Stainless steel fittings fittings sealing principle

Stainless steel fittings ferrule tube fitting the basic structure of the body made ​​of stainless steel fittings , card sets, compression nut composed of three basic parts ( Fig. 1 >, where stainless steel fittings ferrules are key parts .
Stainless steel fittings ferrule is a hill -side with the inner edge of the metal ring , it has good rigidity , hardness and toughness. Stainless steel Hydraulic tube fittings ferrule surface hardness is generally 5 to 63 , hard layer depth of 05 and II, the hardness of the substrate between 9891 ~ 96 . Stainless steel fittings card sets in the assembly process, when tighten the compression nut , stainless steel fittings ferrule axial force, pushed the connector body 24 " tapered bore , the card sets in the radial direction under the action of radial force contraction, so that the inner sleeve and the outer tube cut edge an annular groove is formed , as shown in Figure 2, segment 0 of the annular groove depth of about 3 to 0,501,111 , formed stainless steel ferrule and the pipe joint between the outer wall seal; Meanwhile , the card connector body Gunn outer wall 24 . tapered hole is completely tightly bonded together to form a sleeve between the joint body tapered bore sealing tape . 6 above in Figure 2 . " , 6 two a sealing tape to complete the sealing of a tube . From stainless steel Hydraulic pipe fittings ferrule tube fitting sealing principle can be seen, stainless steel fittings ferrule manufacturing quality is good or bad in itself as well as sealing tape ", 6 are in good form is related to the pipe stainless steel fittings for leaks of the key issues .

Professional production of card sets of pipe joints enterprise outlined Maintenance of pneumatic fittings

Professional production of card sets of pipe joints enterprise outlined Maintenance of pneumatic fittings1 tube fitting connector form: a. Clamp fittings, mainly for cotton braided hose; b. Ferrule fittings, mainly used in non-ferrous metal pipe, rigid nylon tube; c. Insert Hydraulic pipe fittings, mainly suitable for nylon tube, plastic tube. 2 Pipe Connector Type: sub corners, right angles, wear plates, three, four, etc., the user can choose according to need. 3 Nominal pipe fittings interface in three ways: a. According to the connected pipe nominal diameter nominal, commonly known as "Path" in the purchase clamp fittings and ferrule fittings, attention should be the inner diameter of the tube; optional plug-in pipe joints, the pipe diameter should be noted. Commonly used in the three, four and so on branch joints. b. according to the nominal pipe fittings interface thread, such joints are not commonly used. c. according to the nominal diameter pipe and fittings interface thread combinations nominal, pneumatic components commonly used in this type of connector inlet and outlet

Card sets of pipe joints without welding process

Card sets of pipe joints have a solid connection, pressure capacity, high temperature resistance, good sealing and repeated installation and maintenance easy, safe and reliable.Card sets of Hydraulic hose fittings pipe working principle is to insert the card kit, using the ferrule nut, inconsistent card sets, cut the pipe and seal. It is connected with the pipe without welding, is conducive to fire, explosion, and high-altitude operations, and can eliminate the evils of welding accidentally. So it is refining, chemical, oil, gas, food, pharmaceutical, instrumentation, piping and other systems controlled device in a more advanced connections. For oil, gas, water, etc. piping connections.

Prevent the above scenario is this: do not easily loosen or tighten the nut, under

Pipe handling: insert fittings pipe surface should be smooth part intact, avoid scratches and other defects. As shown in the bottom of the tube surface is scratched, the sealing joints affected. To end the tube axis perpendicular to the tube, the tube mouth without glitches. If you want to bend the pipe, the pipe ends to set aside a certain length, see below L value, connector manufacturers to follow the advice given value, otherwise it will affect the pipe insertion and sealing. Note Hydraulic pipe fittings matching size and pipe size. If OD3/8inch and OD 10mm pipe, diameter close, but not with OD10mm OD3/8inch the tube connector, and vice versa is also true. Manufacturers usually in metric fittings made ​​a mark, the installation should pay attention to distinguish.

Suddenly leaking pipe joints how to do

In the hydraulic system , both the metal pipe fitting , or hose fittings , there are prone to leakage problems . Hydraulic tube fittings , mostly due to pipeline subject to greater external force or impact, so that the card sleeve loose or deformed face caused by leaking pipe , you should check whether the card holder out of round , whether the defect edge , whether the pipe ends intact and nut, compression level , etc., while also eliminating pipeline force. For flared Hydraulic hose fittings, mostly due to excessive flaring , quality, undesirable or multiple demolition , resulting in flared cracks or deformation caused by leaks , then you can be re- flared front truncated . If you use a male and female cone top pressure seal , the leakage is mostly due to two cone damage, available on the cone abrasive grit grinding  In some with "о" or outer -ring face seal by the occasion , the leakage following reasons : "о" ring aging or deformation caused by leakage ; "о" ring assembly is not in place , so that the two plane connection when pressure is uneven or "о" ring being cut cause leakage ; "о" rings uncompacted , elastic deformation caused by insufficient leakage ; "о" spigot ring groove too deep and cause leaks. In this regard , the need to re-select the same diameter and cross-sectional thick "о" rings can also be sealed with a rabbet plane for cutting grooves or grinding to reduce the rabbet groove depth , so that "о" rings are flexible enough to deformation ( compression should generally be between 0.35-0.65mm ) . For the use of oil and rubber, wool felt, soft steel cardboard, combined sealing gasket or sealant leaking pipe joints , whether any material , you should first check the seals for damage , deformation, aging and rough through the large , etc. and then take the appropriate measures.

Hydraulic fittings Progentech elaborate hydraulic system of hydraulic fittings

Pressure pipe fittings hydraulic system due to its simple structure, flexible layout, good self-lubricating components, easy, and combined with other transmission methods. Therefore, at present most of the equipment in all types of enterprises on a wide range of applications, all electrolytic tending my factory, casting machines and tipping hybrid furnace and other key equipment are used the hydraulic system. The hydraulic system of hydraulic pipe fittings are generally closed loop piping system, hydraulic system failure is difficult to locate hidden main disadvantages of hydraulic drive. Equipment failure of the hydraulic system as soon as possible once the cause of the fault and immediately removed to reduce parking due to equipment caused economic losses. Engineering and technical personnel required by virtue of their professional and technical skills, basic knowledge of hydraulic transmission, hydraulic fittings components and the basic principles of structural knowledge loop failure analysis.

Metal hose is an important engineering technology connecting member

Metal hose is an important engineering technology connecting member by corrugated flexible tube, a combination of nets Hydraulic hose fittings. In a variety of gas, fluid piping systems as well as length, temperature, position and angle compensation systems as compensation components, sealing elements, connecting elements and a damping element, used in aerospace, petrochemical, mining, electronic, mechanical shipbuilding, medical health, textile electronics, energy and construction fields.Austenitic stainless steel metal hose material or materials required by the user, with excellent flexibility, corrosion resistance, high temperature resistance (-235 ℃ ~ +450 ℃), high pressure resistance (up to 32MPa), the tube path can be connected in any direction, for temperature compensation, and absorb vibration and reduce noise, change the medium conveying direction, remove pipe or between pipes and the mechanical displacement devices, double flange metal corrugated hose to a displacement, vibration a variety of pumps, valves and other flexible joints is particularly applicable.

DGJ hose fittings from solid metal structure and characteristics

DGJ hose fittings from solid metal structure and characteristics:
DGJ from the solid metal hose connector, can no threaded pipe or non-threaded device outlet with hose connection, save the threading process; metal Hydraulic pipe fittings made ​​of zinc alloy die-casting, zinc plated, frosted, or chrome; compact structure, high strength. Steel and metal hose connection, reliable, attractive appearance; This is self-fixed metal joints, metal hose is used to connect to non-threaded or non-threaded pipe outlet on the device; adaptation metal hose: JS-type, JSH type, JSB type, JSHG type; adapter tube: thin steel wire tube, black, galvanized iron pipes (water, gas pipes); selection DGJ from solid metal hose connector hose pipe connection, please note that the specifications, dimensions. (4) 90 degree bend connector: Thread Size: inch thread (G) Material: A, C, F parts are made of high quality steel. D is made ​​of die-cast metal. Color: Metallic (Silver) Operating Temperature: -40 C to 100 C, instant heat-resistant up to 120 C. Product Features:
1, after bonding and cabinet 90 degrees, thick zinc alloy, beautiful appearance, compact structure and high strength. 2, except for the following standard specifications, it may change according to needs of any size and thread standards. (5) 45 degree bend connector: Thread Size: inch thread (G) Material: A, C, F parts are made of high quality steel. D is made ​​of die-cast metal. Color: Metallic (Silver) Operating Temperature: -40 C to 100 C, instant heat-resistant up to 120 C. Product Features:
1, after bonding and cabinet at 45 degrees, thick zinc alloy, beautiful appearance, compact structure, Y-shaped metal hose tee

Since the solid metal hose connector structure and characteristics of

Since the solid metal hose connector structure and characteristics:DGJ from the solid metal hose connector, can no threaded pipe or non-threaded device outlet with hose connection, save Hydraulic tube fittings  process;JINGSHENGFLEX metal joints made ​​of zinc alloy die-casting, zinc plated, brushedor chrome; compact structure, high strength. Steel and metal hose connection, reliable, attractive appearance;
This is self-fixed metal joints, metal hose is used to connect to non-threaded onon-threaded pipe outlet on the device;Metal hose adapter: JS type, JSH type, JSB type, JSHG type;Adapter Pipe: thin steel wire tube, black, galvanized iron pipes (water, gas pipes);DGJ selection from the solid metal hose connector hose pipe connection, please note that the specifications, dimensions

Pressure metal hose cracking analysis

Chemical composition of the base metal hoses meet the standard requirements, microstructure normal. Failure hose member and the base metal and weld finished piece unused micro-cracks are present on the hose, the hose which indicates that micro-cracks before they are used.According to the position and shape of micro-cracks can be divided into two categories: one is located on the weld, the weld along the direction of the main direction of the crack, in addition to many cracks perpendicular to the main secondary cracks, these cracks are located weld intergranular columnar crystal position is formed when the welding weld cracking; second crest of microcracks in Hydraulic pipe fittings of the hose, these micro-cracks in the circumferential direction along the hose (Up direction perpendicular to the weld). and substantially parallel to each other, since the majority of these micro-cracks exist in the inner surface of the crest, and the analyzes were performed by location and morphology with regularity, so these cracks should be rolling waves generated when processing cracks. In welding and molding process, the micro crack initiation at the inner surface of the hose in the subsequent assembly process of trial and the use of extended fatigue microcracks, finally cracked through, causing oil spills. Recommended welding hose and processing to improve, in order to avoid the generation of microcracks.

The advantage of the metal hose

Metal hose because it has a good seal, pressure resistance, high temperature resistance, corrosion resistance, and certain other properties available around the song has become an essential component of modern pipeline. Metal hose can be used for chemical piping systems superheated vapor tube, hydraulic and pneumatic equipment, high-pressure pipeline, the transmission medium, pipes and other drug burst, the role is to absorb the reciprocating movement, absorb thermal expansion, vibration absorption, compensation pipe installation deviation. Because metal hose complicated forces at work, poor working conditions, so the accurate representation of the force metal hose there are considerable difficulties. Largely by the bellows metal hose, and Jic hydraulic fittings nets three parts. Corrugated metal hose pipe is the subject of the role played around; nets from enhanced shielding effect; joint plays a role in the connection.

Proper use of rotary joints

1 down time more than 72 hours before rebooting ring and graphite rings at the junction of the sealing surface surrounding drip lubricant (to prevent damage to two bonded graphite ring). Do not use the machine for a long time can cause rust damage to the rotary joint seals, such as the re-use will be stuck or spill things from happening.2 swivel hose connection must use the entrance, and a sufficient length.3 should be kept inside the piping and rollers clean, new machines often dirty due Hydraulic adapters caused by the rotary joint abnormalities.4 swivel rotary and fixed inner tube threaded points left and right. Clockwise rotation of the roller, with left hand thread rotary joint, whereas the same. Rotary joint rotary axis of right-hand thread, the thread is fixed to the inner tube D, on the contrary the same.5 rotary joint in the handling and installation process, should avoid the collision, no percussion, otherwise easily lead to damage to internal parts.6 In the absence of media into state, should avoid prolonged operation.7 rotary joint work should be in a suspended state.

Metal hose selection

Stainless steel metal hose (also known as metal hose, stainless steel hose, stainless steel corrugated hoses, MetalHose) is a modern industrial pipeline of a high quality flexible pipe. It mainly consists of stainless steel bellows, stainless steel nets and metal hose connector componentsTechnical parameters annular spiral metal hose metal hose technical parametersSpiral spiral corrugated metal hose is a tubular housing arranged in two adjacent corrugation has a helix angle, all of the bellows are connected by a spiral.Annular corrugated metal hose was closed annular tubular Hydraulic adapters by the ring between waves and wave ripples in series. Annular metal hose made seamless pipe or welded pipe forming process. Constrained by the processing methods, compared with spiral corrugated pipe, its single-tube length is usually shorter. The advantage of the annular metal hose is good elasticity, rigidity smaller.Metal hose connectors at both ends: Connector includes threaded connection, flange connection, quick connector, see the thread of connection when selecting summary tables, flanged summary form, the form of summary tables quick connector.Stainless steel mesh cover is a metal braided hoses installed in the pressure line of the main pressure parts, while the protective effect of the metal hose, the pressure in the pipe size and locations, you can select one or more layers of stainless steel wire or steel band performed according to certain parameters is woven to form a high pressure metal hose, I produced Hydraulic tube fittings braided hose pressure range usually ask PN0.6-32.0MPa, up to 42.0MPa. Stainless steel mesh nets are set with steel nets two types. Stainless steel mesh cover type metal hose schematic.Major parts of the metal hose austenitic stainless steel, so as to ensure the metal hose excellent heat resistance and corrosion resistance, the metal hose great temperature range for -196-600 ℃, in actual use , the metal hose pipe material selection should be based on the corrosive medium to select the appropriate grade of stainless steel, metal hose to ensure corrosion resistance.

Metal hose three roles

Metal hose three roles: to reduce piping installation stress, compensating pipe nominal position to absorb the vibration of piping system.1, size hose DN, the choice of the type of connector (mainly flanged, threaded connection, quick connector) and the size of the metal hose, hose lengths. 2, the pressure under actual working pressure hose, corrugated metal hose and then query the nominal diameter and pressure gauges, decide whether to use stainless steel mesh cover types of metal hose. 3, medium hose in the chemical properties of the transmission medium, according Hydraulic tube fittings corrosion resistance of the hose material parameter table, determines the hose material of the parts. 4, the temperature inside the hose and medium operating temperature range; hose when working ambient temperature. High temperatures, the metal hose shall work under high pressure and temperature correction coefficient to determine the temperature corrected pressure to determine the selection of the correct pressure rating. 5, the state is used by the state of the hose, metal hose with reference to the proper use and installation methods and hose compensation in settlement of optimum length. The length of the hose variety of sports state calculation and the minimum number of bends hose and minimum bend radius and other factors, parameters select the correct hose length, and correctly installed.

Metal hose selection

For a given length and specifications of metal hoses, their ability to withstand stress and shock have certain limits, therefore, when used according to the actual situation. Generally used nominal diameter hose and pipe the same nominal diameter, hose length array according to Shen tank temperature deformation, misalignment and earthquakes and other factors to determine the lateral displacement produced.Hydraulic adapters metal bellows tube, nets of three parts and connectors, bellows are made ​​of stainless steel, has a good flexibility, its longitudinal rigidity and bending rigidity is small, within a radius of curvature at the rated working, with a strong corrosion resistance and good temperature stability. Nets from strengthening the role of the metal hose has a large carrying capacity. Therefore, the metal hose with shock, subjected to bending, absorb stress.

Special features of the metal hose

Metal hose is an important engineering technology connecting member by corrugated flexible tube, a combination of nets and Hydraulic tube fittings. In a variety of gas, fluid piping systems as well as length, temperature, position and angle compensation systems as compensation components, sealing elements, connecting elements and a damping element, used in aerospace, petrochemical, mining, electronic, mechanical shipbuilding, medical health, textile electronics, energy and construction fields. Austenitic stainless steel metal hose material or materials required by the user, with excellent flexibility, corrosion resistance, high temperature resistance (-235 ℃ ~ +450 ℃), high pressure resistance (up to 32MPa), the tube path can be connected in any direction, for temperature compensation, and absorb vibration and reduce noise, change the medium conveying direction, remove pipe or between pipes and the mechanical displacement devices, double flange metal corrugated hose to a displacement, vibration a variety of pumps, valves and other flexible joints is particularly applicable.Hose metal hose is installed in the pressure line of the main pressure parts, while the bellows from the sheath effect, according to the size of pipeline pressure and locations, you can select one or more layers of stainless steel wire or steel for weaving, dawn brand hose pressure range is generally PN0.6-32.0Mpa. Up to 42.0MPa. The production of the main part of the material hose is the use of austenitic stainless steel, thus ensuring the hose excellent in heat resistance and corrosion resistance of the hose very wide temperature range, is -196-600 degrees to hose by pipelines through Hydraulic hose fittings choose to apply corrosive stainless steel grades, the corrosion resistance of the hose can be guaranteed. Corrugated metal hose has good flexibility, fatigue resistance, high pressure, high temperature resistance, corrosion resistance, and many other features, it is relative to other hoses (rubber, plastic hose) much higher lifetime would therefore it also has a high overall economic efficiency. With the development of modern industry, for high temperature, high pressure hose corrugated metal demand is also getting bigger. Hose Scope: need fully flexible pipes, to prevent vibration premises piping for steam, gas, air, heavy oil, petroleum, chemical-pharmaceutical etc apply.

Metal hose Application Performance

Closed metal hose has high acid and alkali, high temperature, flexible bend freely and specifications are complete, easy to install, maintenance free, long life characteristics. Applicable to any environment, various types of metal cutting machinery and equipment are applicable. Corrugated metal pipe is a modern industrial pipeline a high quality flexible connecting tube. It mainly consists of metal bellows, metal mesh and various different forms of joint components. It is a spiral-shaped corrugated inner tube or annular corrugated thin-walled stainless steel bellows, bellows outer sleeve made ​​of stainless steel wire mesh or stainless steel Hydraulic pipe fittings to certain parameters. Hose connectors at both ends of piping or equipment in accordance with the user's joint form prepared.Corrugated metal hose has good flexibility, fatigue resistance, high temperature resistance, corrosion resistance, and many other excellent features, it is relative to other types of hose (rubber hose, plastic hose) lifetime is much higher, with the the development of modern industry, resistant to high temperature, high pressure, corrosion-resistant corrugated metal hose is increasingly widely used. Gas stove with gas vent pipe connections, use that is resistant to corrosion, oxidation of the metal hose. Metal hose with threaded connection as long as the stove is connected, you can use the seal will not install due to human causes leaks, and ease of installation.

Metal hose applications industry

Metal hose applications industry1, metallurgical industry, metal hose is gradually transition to competition from product performance competitive cost performance, product structure in shape, the metal hose industry applications has been widely recognized.2, the petrochemical industry, the situation is relatively complex, on the one hand, large-diameter high-pressure hose and tank drain hose central market demand is growing, and new product development in the field of domestic far failed to put in place. On the other hand, some other occasion hose has appeared the phenomenon of alternative products such as dock appearing on the market with a non-metallic conduit tube (light weight, pressure fit). As the petrochemical industry is now the largest domestic market hose, various competitive in this field, input cost of new product development in this area is also larger.3, railway locomotive industries. As used by the Ministry of Railways information required on the form of a composite hose made ​​stereotypes provisions will not be great changes in the product mix in recent years, mainly manifested as price and service competition. But in the long term, the use of complex conditions, the uncertainty of the composite hose damage from abroad perspective of the development of Hydraulic tube fitting, metal hose being replaced is inevitable, so the product development is still far from over.4, shipbuilding industry, product testing by the Society in addition to need, but no special technical performance requirements, but according to foreign domestic data, its market demand is also huge. 5, civil construction, irrigation installation and other industries, in addition to some of the stereotypes of the hose outside (such as plumbing, etc.), thick-walled tube instead of the trend of domestic elbow yet developed, according to Japanese data show that as much as their domestic water heater application prospects hose market.

China's metal hose industry

Nearly half a year, the joint efforts of all parties, the financial crisis in an increasingly ice ablation. Ceramic industry for the better stabilization of the overall situation, but the pressures and challenges still. In fact, due to various reasons, our metal hose industry sector in the development process accumulated in some deep-seated contradictions and problems, not only surfaced, but exposes future development focus and difficulty lies. Excessive investment led to serious excess capacity is widespread, and the industry concentration is low, the structure is irrational, big but not strong problem is very prominent. Insufficient capacity for independent innovation capability, attention to light, less investment, care for immediate benefits at the expense of long-term development, product homogeneity is still fairly obvious. Metal hose enterprises are facing pressure on energy saving is still heavy, product unit energy consumption and resource utilization compared with the international advanced level there are still gaps. Meanwhile, the company's cost remains high. China's metal hose enterprise development, enterprise scale is uneven, the overall competitiveness of Hydraulic pipe fittings needs to be strengthened. The face of the financial crisis triggered by the economic downturn, the timely introduction of the implementation of the national expansion of domestic demand growth, improve the export tax rebate rate and a series of favorable policies and measures, effectively pulling the domestic market, metal hose enterprises to reduce losses generated rebound positive effects play an important role. Ceramic industry for the better stabilization of the overall situation, but the pressures and challenges still. In fact, due to various reasons, our metal hose industry in the development process accumulated in some deep-seated contradictions and problems, not only surfaced, but exposes future development focus and difficulty lies. Requires us to stand on the height of a global perspective, a good grasp of the economic development cycle, analyze the national macro-policy direction for the metal hose industry market Hydraulic hose fittings to analyze specific issues, understand the situation, seize opportunities, reasonable forecast future trend of metal hose industry and formulate correct development planning, timely adjust their development strategies, and actively explore new markets, the crisis in an invincible position in the development of a higher level.

Application of flexible metal hose

Flexible metallic conduit is used in wire and cable protection sleeve of the new material, belonging to the flexible metal hose, can be used for a variety of occasions that concealed within the dark and in-situ concrete laying. Bathroom bath or kitchen washing equipment leakage of water, it will depend on whether the connector metal hose connectors and bolts burst fracture, triangle valve bolt burst phenomenon. If you encounter this situation, measures should be taken to repair the water shutoff, corrugated metal hose adopts foreign advanced technology, combined with Hydraulic ferrules of the domestic market, the characteristics of the stainless steel bellows and rubber elasticity characteristics of Nepal, to optimize the combination, compensation devices, widely used ship, central air conditioning pumps, high-rise building fire pumps, engine export, effectively absorb vibration host or system, reduce transmission source and system expansion and contraction and installation of compensation, noise absorption piping systems, protective equipment, environmental protection, extended equipment and system life. has: Durable, high temperature, high pressure, corrosion, environmental protection advantages. replaced the soft rubber joints caused by unsanitary, easy to aging, pressure unstable, delamination tear, blasting and other adverse factors, to solve the system running worries. damping bellows compensator, metal hose is vibration system supporting the best choice.

Reinforced metal hose production process

Reinforced metal hose: hose housing and disposed therein end portions of the rubber tube is placed between the fastening with three metal sleeve, and the inner flange and the cap casing the outer layer and the intermediate metal valgus sleeve edge clamped together. Connections are secure, using the process will not fall off the hose casing and production installation convenient and simple. Hose casing and placed in one of the rubber tube, rubber tube ends and the ends of the socket with union nut connection gap with metal cap sleeves, middle and outer metal sleeve placed between the metal sleeve. Metal bellows, welded bellows end of the band tapered Hydraulic pipe fittings, characterized in that the bellows other end a and its connected as one of the light pipe, the light pipe sleeve with nuts, inside a the light tube is connected to the one of the convex ring, which has a convex outer ring gasket. Using a local one structure, only the use of a weld, the weld to reduce its impact, reducing the chance of leakage of gas, to improve the safety of use.

Overview of the hose

Hose mainly divided into: stainless steel hose, metal hose, corrugated hose, plastic hoseCorrosion resistance of stainless steel hose depends on the chromium content, if the amount of chromium added to 10.5%, the atmospheric corrosion resistance of steel significantly increased, but the higher chromium content, while still being improved corrosion resistance, but obvious. The reason is of steel with a chromium alloying Hydraulic tube fittings, the change in the type of surface oxide became similar to pure chromium metal oxide formed on the surface.This tight adhesion of chromium-rich oxide protective surface to prevent further oxidation of this thin oxide layer, through which you can see the surface of the natural luster of stainless steel, the stainless steel has a unique surface. Moreover, if the surface is damaged, the exposed steel surface and atmospheric reactions will self repair, re-formation of this kind of "passive film" and continue to play a protective role.

Plastic coated metal hose and application overview

Plastic coated metal hose Major parts of the austenitic stainless steel, thus ensuring a plastic coated metal hose excellent heat resistance and corrosion resistance, plastic coated metal hose operating temperature range greatly, as -196-600 ℃, in actual use, according to corrosive media channels to select the appropriate grade of stainless steel, plastic Hydraulic pipe fittings coated metal hose to ensure corrosion resistance. Annular corrugated plastic coated metal hose was closed annular tubular housing by the ring between waves and wave ripples in series. Annular plastic coated metal hose made seamless pipe or welded pipe forming process. Constrained by the processing methods, compared with spiral corrugated pipe, its single-tube length is usually shorter. Plastic coated metal hose is made of very thin-walled stainless steel seamless or welded congregation plastic coated metal hose through high-precision plastic processing forming. As plastic coated metal tube determines the elastic properties of the silhouette hose has good flexibility and fatigue resistance, making it very easy to absorb deformation of the cyclic loading a variety of sports, particularly in the piping system has the ability to compensate for a large amount of displacement .

Grain metal hose features

Grain metal hose features:1, the recommended maximum allowable amount of expansion of each wave: full-height △ α = ± 24mm half-high △ α = ± 12mm.
2, block gray plate: less dust on the air duct pipe may not be used for dusty flue should file gray board.3, to reduce the number of bellows node should be considered cold drawn 50%.4, the standard half-height corrugated metal hose for cross-sectional area lessthan 4.6 square meters and the smoke duct dimensions less than 1.5m in one side but greater than Hydraulic tube fittings 0.6mm occasions. Standard full-height corrugated metal hose for all the smoke duct.Corrugated metal hose has good flexibility, fatigue resistance, high pressure, high temperature resistance, corrosion resistance, and many other features, it is relative to other hoses (rubber, plastic hose) much higher lifetime would therefore it also has a high overall economic efficiency. With the development of modern industry, for high temperature, high pressure corrugated hose you also demand greater and greater.Hose Scope: need fully flexible pipes, to prevent vibration premises piping for steam, gas, air, heavy oil, petroleum, chemical-pharmaceutical etc apply.

Metal hose material characteristics

Metal hose connectors at both ends: Connector includes threaded connection, flange connection, quick connector, metal hose three main functions: to reduce the stress of the pipe installation, compensating pipe nominal position to absorb the vibration of piping system.Stainless Hydraulic ferrules steel mesh cover is a metal braided hoses installed in the pressure line of the main pressure parts, while the protective effect of the metal hose, the pressure in the pipe size and locations, you can select one or more layers of stainless steel wire or steel band performed according to certain parameters is woven to form a high pressure metal hose, I produced the metal braided hose pressure range usually ask PN0.6-32.0MPa, up to 42.0MPa. Stainless steel mesh nets are set with steel nets two types.

Special features of the metal hose

Metal hose is an important engineering technology connecting member by corrugated flexible tube , a combination of nets and fittings . In a variety of gas, fluid piping systems as well as length, temperature , position and angle compensation systems as compensation components, sealing elements , connecting elements and a damping element , used in aerospace , petrochemical , mining , electronic, mechanical shipbuilding, medical health , textile electronics, energy and construction fields.Austenitic stainless steel metal hose material or materials required by the user , with excellent flexibility, corrosion resistance, high temperature resistance (-235 ℃ ~ +450 ℃), high pressure resistance ( up to 32MPa), the tube path can be connected in any direction , for temperature compensation, and absorb vibration and reduce noise , change the medium conveying direction , remove pipe or between pipes and the mechanical displacement devices , double flange metal corrugated hose to a displacement , vibration a variety of pumps, valves and other flexible joints is particularly applicable.
Hose metal hose is installed in the pressure line of the main pressure parts , while the bellows from the sheath effect,Hydraulic tube fittings according to the size of pipeline pressure and locations , you can select one or more layers of stainless steel wire or steel for weaving, dawn brand hose pressure range is generally PN0.6-32.0Mpa. Up to 42.0MPa. The production of the main part of the material hose is the use of austenitic stainless steel , thus ensuring the hose excellent in heat resistance and corrosion resistance of the hose very wide temperature range , is -196-600 degrees to hose by pipelines through the media choose to apply corrosive stainless steel grades, the corrosion resistance of the hose can be guaranteed . Corrugated metal hose has good flexibility, fatigue resistance, high pressure, high temperature resistance, corrosion resistance , and many other features, it is relative to other hoses ( rubber, plastic hose ) much higher lifetime would therefore it also has a high overall economic efficiency . With the development of modern industry , for high temperature, high pressure hose corrugated metal demand is also getting bigger . Hose Scope: need fully flexible pipes, to prevent vibration premises piping for steam, gas , air, heavy oil, petroleum, chemical -pharmaceutical etc apply.

Metal hose Application Performance

Closed metal hose has high acid and alkali, high temperature, flexible bend freely and specifications are complete, easy to install, maintenance free, long life characteristics. Applicable to any environment, various types of metal cutting machinery and equipment are applicable. Corrugated metal pipe is a modern industrial pipeline a high quality flexible connecting tube. It mainly consists of metal bellows, metal mesh and various different forms of joint components. It is a spiral-shaped corrugated inner tube or Hydraulic hose fittings annular corrugated thin-walled stainless steel bellows, bellows outer sleeve made ​​of stainless steel wire mesh or stainless steel woven according to certain parameters. Hose connectors at both ends of piping or equipment in accordance with the user's joint form prepared.Corrugated metal hose has good flexibility, fatigue resistance, high temperature resistance, corrosion resistance, and many other excellent features, it is relative to other types of hose (rubber hose, plastic hose) lifetime is much higher, with the the development of modern industry, resistant to high temperature, high pressure, corrosion-resistant corrugated metal hose is increasingly widely used. Gas stove with gas vent pipe connections, use that is resistant to corrosion, oxidation of the metal hose. Metal hose with threaded connection as long as the stove is connected, you can use the seal will not install due to human causes leaks, and ease of installation.

Stainless steel pipes instead of water supply pipeline has become the trend of other materials

As more and more high buildings, high-rise buildings in the drinking water and fire water delivery systems have special requirements, the system must not only be able to withstand high pressure but also caused by the earthquake and the building of wind movement. Engineers are with stainless steel piping system meets these requirements. The world's newest and tallest 3 buildings (China Taiwan Province, Taipei Financial Center, Brisbane, Australia Oro Plata Building and Kuala Lumpur Petronas Twin Towers) is the best illustration of this to the high pressure stainless steel pipe the system Hydraulic adapters changes. In the past 25 years the German drinking water extraction, treatment and distribution systems made ​​of stainless steel has been growing widely recognized. Stainless steel tube is not only smooth luxury, look as new, and is widely recognized as a leading environmental health water supply pipes. The strength of austenitic stainless steel pipe carbon steel pipe 2 times, 4 times brass, PPR plastic pipe 8 times, is truly safe and reliable and can be done with the building with life green pipe. Another major use of stainless steel piping is - the life cycle cost of stainless steel components has obvious advantages, because the long-term infrastructure such as drinking water means the use of a stainless steel, you rarely need to be replaced. Although stainless steel drinking water systems in the world, the universal application will take some time, but in the engineering and economic aspects of stainless steel has the advantage over other alternative materials have shown that: instead of other materials with stainless steel pipe water pipe has become a trend. .

Swivel hose joint installation knowledge

1, the rotary hose fittings in the handling and storage process should avoid bumps and drops, to avoid damage to the interface and internal parts.
2, concentric installed as to ensure the smooth functioning of the rotary joint.
3, the threaded connection rotating hose connector during installation, you should pay attention to the inner and outer tube is threaded to correspond to the direction of rotation of the drum, and the inner and outer tubes screwed to it should be consistent.4, swivel hose Hydraulic tube fittings and pipeline connection between the hose must be connected (we recommend the use of scrambling and good company metal hose), the absolute prohibition of rigid connection.5, swivel hose joint entrance as directly as possible with the hose. To relieve joint auxiliary weight and prolong life.6, the inner tube assembly, with attention to the size and weight of the auxiliary support. Internal rotation of the rotary joint with the inner tube and fitting tolerances recommended H8/e7 fit.7, the rotary joint rotation stopper should be properly supported and generally lever detent hole diameter should be smaller than 2mm, so as not to affect the freedom of swivel adjustment and compensation. Connected to the device for rotating the joints of the various connections (customer specific configuration of the device according to set various types of connections

Metal hose connector Category

Metal bellows hose, there are two, one is the spiral bellows; another is an annular bellows.Helically corrugated pipeSpiral spiral corrugated bellows is arranged a tubular housing between the two adjacent corrugation has a helix angle, all of the bellows are connected by a spiralBellow Bellows is a corrugated tube was closed annular shaped housing,Hydraulic hose fittings between waves and wave ripples from the ring series. Bellows seamless pipe or welded pipe from the forming process. Constrained by the processing methods, compared with spiral corrugated pipe, its single-tube length is usually shorter. Bellows advantage of good elasticity, stiffness smaller.

The use of metal hose

Metal bellows hose, there are two, one is the spiral bellows; another is an annular bellows. Bellows  Hydraulic tube fittings  corrugated bellows is a tubular housing arranged in two adjacent corrugation has a helix angle, all of the bellows are connected by a spiral. Bellows Bellows is a corrugated tube was closed annular shaped housing, between waves and wave ripples from the ring series. Bellows seamless pipe or welded pipe from the forming process. Constrained by the processing methods, compared with spiral corrugated pipe, its single-tube length is usually shorter. Bellows advantage of good elasticity, stiffness smaller.

T-shaped metal tee joint structure and characteristics

T-shaped metal tee joint structure and characteristics:T-shaped tee metal hose connectors, connector at one end thin steel wire tube, the other ends of the metal connector metal hose;JingshengFlex metal joints made ​​of zinc alloy die-casting, zinc plated, brushed, or chrome; Hydraulic adapters compact, non-porous, high strength. Reliable connection with metal hose, aesthetic appearance Metal hose adapter: JS type, JSH type, JSB type, JSHG type, complete specifications;Can be customized non-standard metal hose joints and special metal joints.

Self Secured EMT pipe joint structure and characteristics

Self Secured EMT pipe joint structure and characteristics:Self Secured EMT pipe joint structure and characteristics, can non-threaded pipe or non-threaded device outlet with hose connection, save the threading process; metal fittings made ​​of zinc alloy die-casting, zinc plated, frosted, or Hydraulic tube fittings chrome; compact structure, high strength. Steel and metal hose connection, reliable, attractive appearance; This is self-fixed metal joints, metal hose is used to connect to non-threaded or non-threaded pipe outlet on the device; adaptation metal hose: JS-type, JSH type, JSB type, JSHG type; adapter tube: thin steel wire tube, black, galvanized iron pipes (water, gas pipes); optional solid-type EMT fittings from the structure and properties of steel hose connection, please note that the specifications, dimensions .

EMT fittings profile

EMT fittings profile(1) EMT fittings highest tensile properties, derived from a special patented design crowns clamping jaw and seal the match. (2) the product packing nut with a thread, relaxing design, able to withstand high near vibration caused by mechanical equipment loose danger. (3) a professional point of view using high specification materials performance, the most outstanding weathering performance has been verified numerous user experience. (4) EMTHydraulic pipe fittings in the history of the most perfect dustproof and waterproof design when the cable and connectors through an appropriate mix of up to 50 meters underwater safe to use. Protection class IP68. (5) This product is fully complied with strict safety design, its material properties are also able to resist a variety of chemicals, solvents, oil and gas and oil, etc. caused by erosion. This product is UL inspection. (6) EMT fittings As a professional leader in fixed head, we have their proactive customer service provide all kinds of safety documents UL, CSA, DNY, VDE and GL and other international certification, SGS test report and in strict accordance with the ROHS Directive check

Tilt sensor is used

Tilt sensor is used: in the vicinity of the wire suspension clamp mounting tilt sensor to monitor changes in lead angle, corresponding to wire sag and temperature curve, compared to the angular difference calculation leads to increase the amount of stress, so as to arrive icing the quality of the conversion to the equivalent of equivalent ice thickness. Key to this approach is the conductor sag data and Hydraulic tube fittings  curve is affected by many factors, even the slightest error, the quality of ice big difference. If the tilt sensor and force sensor combination, we will replace the tension sensor ball hanging ring, measured in a vertical file directly from within the wire quality, the use of wind speed, wind direction and inclination sensors to calculate the drag coefficient and the tilt component of insulator strings, a process of elimination, concluded ice mass, and then converted to equivalent density 0.9g/cm3 ice thickness. This method is the most direct, most reliable and internationally accepted minimum error method. Currently axis tilt sensor and force transducer power sector has long been affirmed in the weighing method used to monitor icing device also has good features scalability, dual-axis tilt sensor can monitor the installation of the tower is exposed vertical downforce, longitudinal uneven tension wire tower wind angle and inclination and so on....

Metal hose connector or bad security risks of our everyday life

Frequently used in our daily life hose, especially bathroom and kitchen equipment, hose fittings when it will be used more and more, though, is an insignificant thing, gave life a very big security risk Therefore, the quality of the metal hose connector will enable more people are getting attention.Gas ventilation hose humble length, there may lead to disaster. Residents of the home due to the rubber hose off the stove, causing gas leak. The other residents of the home, stove rubber hose fittings on bitten by rats, the whole kitchen exploded. Appliance Market law cases briefing revealed that the step by step to promote metal hose, and in the new real Hydraulic hose fittings estate supporting the installation of the stove threaded interface for convenient installation. Metal hose connector with threaded connection as long as the stove is connected, you can use the seal will not install due to human causes leaks, and easy to install, easy to aging.Bathroom bath or kitchen washing equipment leakage of water, it will depend on whether the connector metal hose connectors and bolts burst fracture, triangle valve Hydraulic ferrules burst phenomenon. If you encounter this situation, measures should be taken to repair the water shutoff, and immediately and decoration companies and informing its view to the scene, to discuss measures to reduce losses, after the landlord may negotiate with the responsible party, or request the relevant departments to the scene to help solve.From people's daily life difficult to see a good metal hose connector optional necessity, a good connection is not only a family to buy a security, but also enables families to reduce unnecessary economic losses. Yong-yu Metal Hose Company safety starting from the customer to produce a range of economical and practical metal hose connectors, and I have a good supporting services to solve your worries during use.

The development process of the metal hose connector Release

Metal hose fittings in modern industry occupies an extremely important position. But the works of some kind of superheated high temperature medium; liquid hydrogen, liquid oxygen, liquid helium cryogenic medium class; gasoline, kerosene, acids, alkalis and other aggressive media ...... if using an ordinary connector to transport, that is certainly is not acceptable.After the development of metal joints for a long period of time to the late 17th century, the Dutch Golden Gai Wan • Bender brothers made ​​a longitudinal suture canvas hose, at the time of the fire service is widely used. Since the hose connector occupies an important position, the joints are also valued by the people since then. Later, with the rubber in the international market development, hoses and metal wire or twine and other fabrics armored hose come out. So, how is it developed it? Initially, people used animal skins Hydraulic pipe fittings Hydraulic pipe fittings sewn into a tubular structure to meet the needs of the struggle produced. Especially at high temperatures under the premise, it is more difficult to ensure the security and reliability.Therefore, it gradually to focus on the metal tube and metal hose connector, the changing geometry of the metal tube, to produce the corresponding corrugated external surface. In this way, both with the same flexibility with hose; same time, high temperature resistance, low temperature resistance, aging resistance, corrosion resistance. Thus, as the metal hose body metal bellows thus produced.
Corrugated metal hose from the tube as important in terms of the significance of the development of metal bellows, which means the development of metal joints. Subsequently, it is covered with the bellows outer bread rubber, nylon, plastic tubes or other materials, sheathed with metal wire or metal tape composed of nets, changing the form of a variety of connectors, to meet the variety of conditions different requirements to create various forms of metal hose. Metal hose fittings and metal hose in the course of history into mutual insurance, mutual development, and constantly adapt to the needs of society, but also to promote the progress of society.

Commonly used in our daily lives which metal fittings

Commonly used in our daily lives which metal fittings?Corner metal hose connector thread size: Inch G; Material: ACF parts made ​​of high quality thickened zinc alloy, BE part made ​​of nitrile rubber, D is made ​​of iron sheet; Color: Metallic color (white); temperature: -40 ℃ ~ +100 ℃, short time up to +120 ℃; protection: IP6One kind of metal pipe thread Hydraulic ferrules lock type quick connector, this new joint has a simple structure, convenient connections, connections are secure advantages in vibration, shock or other circumstances will not drag pipes leak or broken pipe phenomenon, safe and reliable; and which can withstand internal pressure strong, up to 70 MPa.Metal hose connector with external thread connections are secure, strong pressure, tightness, and repetition is good, easy installation and maintenance, safe and reliable.Quick plug for quick and easy replacement of metal fittings, has a good seal and interchangeability. For smaller diameter, pressure of the occasion.

Metal fittings correct installation methods and the effect

Metal fittings for proper installation1 deburred after cutting the trachea, the endotracheal tube fitting end into the metal socket inside, you can achieve a solid connection and sealing.(2) Remove the trachea, with the thumb pressed into the connector ferrule and gently pull force to the trachea.3 trachea repeatedly pulled out. Worn parts should be cut ends. Shuhei successors continued use.4 right angles, tees, crosses and other terminal metal Hydraulic pipe fittings . After installation, just rotary joint body, you can adjust the direction of the joint takeoverMetal joint effect is: it's connected with the metal tube outer diameter equal to or slightly larger, so the small space; joint connection strength of the two metals can be achieved in less yield strength of a metal material, to withstand the internal pressure of up to 80 kg 60 kg hydraulic or pneumatic; manufacturing process is simple, and high reliability.

Metal hose connector basic method of selecting adhesives

Adhesive has a special feature, the metal fittings are widely used. The world for different purposes than ten thousand kinds of adhesive above, the choice of adhesive, the need based on the following four tips to judge. (1) The dielectric properties of the different types of gas or injection of the adhesive force of dissolution medium is quite different, and even then angle during operation of a prime mainly air, water, oil, and acids. Hydraulic tube fittings  Use adhesive should be selected using the media-resistant plastic. (2) The adhesive strength of the adhesive strength and tensile strength, shear strength, torsional shear strength and peel strength lengths denote private detective adhesion member in a different direction of the force of the breaking strength. Select adhesives, should be based on the position of mechanical parts and force the situation with suitable choice misunderstanding strength adhesive. (3) heat resistance refers to fully cured layer can withstand temperature range, such as a temperature -60 º C-120 º C, that is, the stick and can be -60 º C to 120 º C range applies exceed this limit, the adhesive force decreased. (4) Curing time Curing time is hereinafter bonding adhesive at room  Hydraulic hose fittings  into a solid plastic housing gummy at the required time. Fixture is exposed adhesive layer is not due to weight loss pieces time required; whole solid layer is fully cured, and the highest strength and resistance to media stick Sharp function best time. Nylon cable ties on the slow Adhesive For shorten the curing time, the available heat blowing heated oven baking and other measures, but the heating temperature and time should be different types of plastic may be. The above points are Yong-yu adhesive metal hose fittings selecting the basic principles, and only correct choice adhesive in order to achieve the desired results, the use of recovered metal hose connector performance, thereby improving the utilization of metal pipe joints, increase economic efficiency.

Metal joints

Metal hose fittings are installed in the pressure line of the main pressure parts, while the role of the bellows from the sheath. The production of the main part of the material hose is the use of austenitic stainless steel, thus ensuring the hose excellent in heat resistance and corrosion resistance of the hose very wide temperature range. Corrugated metal Hydraulic adapters  hose has good flexibility, fatigue resistance, high pressure, high temperature resistance, corrosion resistance, and many other features, it is relative to other hoses (rubber, plastic hose) much higher lifetime would therefore it also has a high overall economic efficiency

How to choose a good metal joints

How to choose a good metal joints1, the type of fluid, temperature (see selected for the type of fluid, the temperature of the body material and the sealing material of the metal fitting), the fluid, for the body material, the sealing material is different2, the liquid pressure (see the selected fluid pressure for pressure resistance of the metal fittings), Hydraulic tube fittings  pressure of the fluid quick connector is selected key. Withstand voltage characteristic corresponding to the metal mounting structure is different.3 metal connectors use environment (please select suitable environment construction, materials of metal fittings), combined with the use of environmental conditions of humidity and dust conditions, and easy to use environment, corrosion, etc., to consider the type and selected metal joints body material. 4, the installation of the shape and size

Direct connection of dissimilar metal joints form is characterized by

Direct connection of dissimilar metal joints form is characterized by
1) directly without going through the third welded together to form a permanent non-removable connector.2) can be welding,  Jic hydraulic fittings pressure welding, brazing, etc. any kind of welding processes to complete.3) connect directly welded joints, in the production practice has great practical value, the application is very wide.4) The mechanical properties of welded joints is high.

Because plastic coated hose connector design unreasonable phenomenon caused by the failure

Pack plastic hose connector design is essential, which is the core technology of hose assemblies. In actual operation, including plastic hose connector design is often notA good grasp of various key points, it will cause a variety of failures. Because plastic coated hose connector design failures caused by the unreasonable phenomenon is most prevalent are withheld at the inner tube longitudinal cracks appear and Hydraulic tube fittings  cracks are two, there are other symptoms, but not common. There are the following two:A withholding longitudinal cracks appeared at the inner tubeWithhold part of the end of the sleeve, the inner tube vertical microcracks appear, once a crack running through, it will result in failure of hose assemblies2 withhold the inner tube at the circumferential cracks appear
In actual use, and the testing process is also one of the more common symptoms. Inner tube circumferential cracks appeared after the weak link here will become, along with the gradual extension circumferential cracks, often in the form here leak, resulting in failure of hose assemblies.

Metal joints

Used in a variety of connectors on the car. These Hydraulic pipe fittings are made ​​from steel or lead quality, and surface paint, to avoid rust rot. Generally use special seals joints, because the protective order to seal joints only afraid of vibration, and reliable sealing.When installing fittings, rubber seal ring must use fluoride-resistant rubber ring; and fitted with rubber ring, which must be the same size and connector specifications, and the surface needs to apply refrigeration oil. When tightening the nut, the joint can not move, gently tighten with a wrench, but notToo tight, otherwise it will cause leakage.

Friction stir welding of aluminum

Friction stir welding of aluminum / copper properties of dissimilar metal jointsAl / Cu dissimilar metal joints integrated the advantages of both, has excellent mechanical properties and electrical conductivity, are widely used in electric power, chemical, manufacturingCold and aerospace industry, with a wide range of practical value. Al / Cu solder, since the Al / Cu material physical properties and chemical properties and Hydraulic hose fittings differences, resulting in vigorous oxidation welding, pores, cracks; brazing the aluminum / copper electrode potential difference caused by corrosion of the joint, in the weld appear brittle intermetallic compounds, resulting in joint performance.

Pack plastic hose fittings and calculations finite element mesh

Pack plastic hose fittings and force structure is closely related with the truss structure, usually composed of several interconnected metal tubes which consists of, in order to solve complex package plastic hose connector finite element analysis and design issues, the establishment of a hose plastic bag joint finite element analysis model. Hydraulic pipe fittings  three-dimensional modeling using AutoCAD module as modeling support, the use of Boolean functions between entities, find the intersecting curve between the tube. Then intersecting line as the boundary of the metal connectors apart, using the same method on any tube-shaped metal fitting finite element mesh generation: Finally, the role of the joint member forces on the other put into the node set Jane, forming a finite element model.

Butt weld dissimilar metal joints

Dissimilar metal joints or butt weld two different metals from the base material welded directly or using the first isolation layer added, after the method of welding, in the latter case, the spacer  Hydraulic ferrules  and a joint assessment of the welding process can be performed simultaneously .
Taking into account the performance of existing materials, in all cases, especially in the cut specimen should be cut so that the specimen should be able to reflect the characteristics of each connection area and observe the following precautions:Transverse weld test should have been done the base material, the isolation layer (if any) and weld joints. Bend test shall be to make the fusion line, the isolation layer, deposited metal under stress manner. The numb

Pack plastic hose connector installation and application

Plastic coated metal hose is mainly used for the production, processing cable protection. Because plastic coated metal hose with light weight, good flexibility and strength of the connection accessories, electrical properties and oil, splash water and other features, so often widely used in electric power, chemical industry, metallurgy, light industry, Jic hydraulic fittings  machinery and other industries. Hose plastic bag purpose is to protect the wire and cable and insulation, waterproof, can increase the cable bend beautiful. Although compressible metal hose can stretch, but if you do not install the correct position, it will soon break, reduce the service life. Hose plastic bag selection, reference should be corrosion hose material machines and corrugated plastic coated metal hose DN, use, the first cable wires through the pipes, matched with the corresponding model DPJ type connector that available.

Reduce energy consumption, make use of energy

Hydraulic technology in the mechanical energy is converted into pressure energy and anti-conversion areas, has made great progress, but there has been energy loss, mainly reflecting the volume of the system losses and mechanical losses on. If all of the pressure energy can be fully utilized, the energy conversion efficiency of the process would be significantly improved. In order to reduce the loss of pressure energy, the following questions must be addressed:
① components and systems to reduce the internal pressure loss, to reduce power losses. Mainly in the improvement of the internal flow channel component pressure loss, the use of integrated circuits and casting flow channel, pipeline losses can be reduced while also reducing leakage losses. ② reduce or eliminate system throttling losses, minimizing non-security needs of overflow traffic, avoid using throttle system to regulate the flow and pressure. ③ hydrostatic technology, new sealing materials reduce friction losses. ④ the development of small, lightweight, composite, extensive development of three diameter, 4-way solenoid valve diameter and low power solenoid valve. ⑤ improve Hydraulic pipe fittings system performance with load-sensing system, secondary-conditioning systems and the use of accumulator circuits. ⑥ for the timely maintenance of the hydraulic system to prevent contamination of the system affect the life and reliability of the need to develop new pollution detection method for online measurement of pollution, to promptly adjust, not lag, so the treatment is not timely and losses

Hydraulic system maintenance from the past simple failure overhaul, the development of failure prediction

Hydraulic system maintenance from the past simple failure overhaul, the development of fault prediction that found fault symptom, the pre-maintenance, removal of hidden faults, to avoid the development of equipment vicious accident. To achieve proactive maintenance techniques must be strengthened hydraulic system fault diagnosis methods of research, currently, with experienced maintenance technicians sense Palace and experience, through seeing, hearing, touch, measure, etc. to find the fault has been judged unsuitable for modern industry to large , continuous development and modernization of direction, so that Jic hydraulic fittings  system fault diagnosis must modernize, strengthen the expert system to summarize the knowledge of experts, establish a complete, functional expert knowledge with learning and using computer based on the input and knowledge of the phenomenon library, knowledge, and use the existing inference engine reasoning method, calculate the lead cause of the failure, improve maintenance programs and preventive measures. To further lead to the hydraulic system fault diagnosis expert system generic software tools for different hydraulic systems simply modify and change in a small number of rules. In addition, the hydraulic system should be developed from the compensation system, including self-adjusting, self-lubricating, self-correction, before a failure occurs, compensation into the city, which is the hydraulic industry efforts.

cavitation effect of the hydraulic system

Cavitation in the hydraulic system is usually disastrous consequences. An axial piston pump plunger hole in the metal erosion will occur. Pump inlet pressure but not high enough to its suction stroke of the plunger is retracted so that the liquid accelerated into the plunger hole. Liquid to form a hole, when these holes next to the plunger hole wall collapse,  Hydraulic tube fittings  pressure (transient may reach 4.5 × 104Mpa) knocked off from the wall or chipping off a little metalDamage to the gear pump can be displayed side by side, that is envisaged in the low pressure suction side of the holes are produced by both the high pressure side to the oil discharge side and is crushed to be explained (such damage may also be caused by air inclusion, as cavitation caused by the same).In the vane pump, the occurrence of cavitation clear signs of the blades of the stator on which the sliding surface ripples. Since cavitation, leaf becomes unstable, tend to bounce back and forth instead of sliding.

Oil Drill Collar Thread Repair theory

Oil drill collar for oil wells drilled in the lowest part of the drill string , through the drill pipe and drill bit with taper thread connections . Because of poor working conditions , and therefore the higher the frequency of wear , requiring constant maintenance updates to ensure the normal operation of the drilling platform . For the repair of damaged threads , generally in the thread on the basis of the original processing , to meet the operational needs of the screw thread . Thread Repair can increase Hydraulic ferrules  oil exploration, mining industry equipment using drill pipe drill collar reuse , extend the actual life of the drill collar , while also serving as resource-saving effect. Lathe repair thread inefficient and relatively low precision machining , CNC lathe threading principles and drill collar thread repair works have a certain distinction, affect production and processing efficiency and accuracy of thread . Subject to kinematic principles and screw machine repair theory as key research content. Analysis lathe mechanical structure and the use of ordinary lathe thread feed motion laws, and the use of space geometry approach to sport this movement will function formulas describe the way . Depth analysis of two different processing methods for turning threaded feed , and how to ensure that the movement of thread processing relationship to the correct processing of the tooth type thread . The method describes the use of spatial geometry processing and CNC lathes Thread Thread Repair motion function .

Based on CAD ​​/ CAM / CNC design and manufacture of hydraulic fittings

Hydraulic fittings is a large building and maintenance is an important part of the machinery , the use of CAD / CAM / CNC technology to achieve joint modular design and rapid manufacturing is to ensure the quality of its quality and processing efficiency and effective way. In this paper, based on CAD ​​/ CAM / CNC design and manufacture of hydraulic fittings for a more comprehensive study , the main research contents are as follows : 1, non-standard hydraulic fittings , modular : the analysis of the company 's  Hydraulic hose fittings  on the basis of the type and characteristics of established a basic model of hydraulic fittings . According to the model into basic modules ( body ) and add-on modules ( daughter ) , to classify and define , while establishing the main series , sub-module, and ultimately of modularity. 2 , hydraulic fitting CAD-based design : hydraulic fittings in accordance with the classification approach to the company as a research prototype hydraulic fittings from the perspective of parametric design of hydraulic fittings from menu development , modeling, database design, module synthesis steps . 3 , CAM-based hydraulic fittings NC code generation : To investigate the standardization process route hydraulic fittings , cutting elements of the standardization work , especially in the deep understanding of the EdgeCAM post-processor after its transformation , and the establishment of a suitable company CNC the new template system , which derived from the practicality of EdgeCAM NC code

End seal hydraulic fittings Improvement

End seal hydraulic fittings improved end seal Hydraulic ferrules  , welded end straight couplings . End sealed with two flat washers a gripping combination to achieve. Such sealing of the following deficiencies : 1. Rotary joint body bind human body fine thread , due process in the tail for a reason undercut . So the inner diameter substantially equal to the diameter of the thread is not easy to achieve a combination washer correct positioning ( alignment ) , the installation pad because easily damaged. 2 . The sealing properties of such end seal

New Marine hydraulic fittings -GS flanged pipe joints without welding

New Marine hydraulic fittings -GS flanged pipe joints without welding
In marine vessels and offshore engineering ( such as offshore drilling platforms ) Hydraulic Equipment Factory has been the use of a pan , and its increasingly large proportion . Fittings hydraulic system safety and reliability is crucial, conventional welded flanged pipe joints, assembly and disassembly problems , maintenance difficult. Especially in the work of the vessels and rigs , and if found defective pipe joints , should the need for welding , is often impossible. Therefore urgent to disassembly is simple, reliable , without welding flange connection Hydraulic ferrules . Therefore, no welding GS flanged hydraulic : a fitting tube came into being , the countries have already put into use. Currently GS -type non-welded hydraulic fittings , its technical specifications are as follows : nominal pipe diameter: small 20 a small 165mm, wall thickness 5 mmo working pressure : 42MPa its basic structure has the following two ways: one is with a 37 " flare non- welded flanged pipe joints , another is a ring with a metal hose fittings without welding flange

Fe-Mn-Si-Cr-Ni shape memory alloy pipe joint of

Based on the analysis and abroad since the eighties the development of a new iron-based shape memory alloys on the basis of research results , presented at the pipe joint applications exist three questions: shape recovery rate and the small amount of deformation can be restored ; lack bound state of the alloy , heat recovery stress generated when the study ; alloy pipe joint performance on its application process issues few studies . This paper focuses on the expansion ratio Hydraulic hose fittings  , recovery annealing temperature , thermal mechanical cycling training and other factors on characteristics of tube connector , and with alloy wire and sheet comparison . In addition, the use of large general-purpose finite element analysis software (ANSYS) on the tube connector system temperature field numerical simulation . Obtain the following innovative research. Quenching temperature has a great effect on the shape memory effect . Alloy at 650 ℃ ~ 750 ℃ ​​range of quenching, the best shape memory effect . This article also found that , with the quenching temperature , quenching medium different shape memory effect of the alloy increasing influence . Quenched in water alloys shape memory effect best . The research results of engineering application laid an important foundation. Thermomechanical cycle training can significantly improve the response rate and the alloy can be restored shape deformation , deformation of the alloy can be improved response alloy constraints led to room temperature after cooling is improved recovery stress σ_r

NiTiNb shape memory alloy pipe fittings strength of the system model and optimization design

NiTiNb shape memory alloy pipe fittings strength of the system model and optimization desigNiTiNb pipe joints is a new shape memory alloy pipe joints in piping connections has a good application prospect. The strength of fittings and system optimization design of its structure in its nuclear reactor steam generator vessel piping connections on the application of great significance . This paper studies the NiTiNb alloys at high temperatures sag resistance , and shape memory alloy NiTiNb the response characteristics of various constraints , then the use of solid mechanics knowledge to build up strength NiTiNb fitting a mathematical model system to study the strength of the pipe joint system the variation with temperature , and Hydraulic tube fittings were optimized . NiTiNb alloy sag resistance will affect the high-temperature strength NiTiNb fittings , so first NiTiNb alloy at different temperatures under different initial anti- stress relaxation properties have been studied , the results showed that: the temperature at 300 ~ 400 ℃, the initial stress at 260 when ~ 360MPa , NiTiNb good stress relaxation resistance alloys , used to prepare the pipe joint in temperature does not exceed 300 ℃, stress does not exceed 360Mpa conditions safely. Shape memory alloy pipe fittings hold on power was taken over from a shape memory alloy phase transition temperature , the restoring force generated constraints

Correctly identify the introduction of hydraulic fittings on the device

Country from abroad a large number of hydraulic equipment and devices. Therein. Various hydraulic fittings are easy to wear and tear one piece . At present, no international a unified international standard hydraulic fittings , while the bow a feed device type hydraulic fittings weigh more, varies greatly, which gives maintenance has brought great difficulties. In this paper, the international community has primarily affects five national standard pipe fittings, its structure, characteristics and uses of national or regional differences such as profiles, lists a brief introduction ( see table ) , for reference. Table towel fittings not all listed on mechanical equipment,  Hydraulic tube fittings systems, following the more widely used pipe fittings : ts person E J51437. Flared fittings is the world's most widely used as a connector. But it has a weak gasoline and other connectors with the same specifications as compared to the torque sensitivity is higher, namely anti- torque force is weak, if the mounting angle is not appropriate in the case of easy to produce high-pressure leaks . 2.SAE J14 Bow 30 -ring seal fittings , mainly for the United Kingdom, Canada, manufacturing facilities , and other countries are also being gradually increase the amount used . 3. J15B8363 60. Cone fittings, is widely used in Japan and the UK , one of the joints . It is by the metal surface of the cone seal , the sealing performance , high reliability

Mine hydraulic fittings jacket and ball core cold extrusion process

Mine hydraulic fittings mainly used for mine , tamping tract and other hydraulic systems . Due to security needs to be updated quickly , demand, be manufactured by machining , process is relatively simple, but relatively large pore size coat , causing supplies more traditional production process , and the production is low , it is necessary to change the conventional pipe joint mine production methods. Cold extrusion process with supplies ,  Hydraulic hose fittings high efficiency advantages. As a superior performance with little or no machining processes, both technically and economically practical value . In machinery, instrumentation , electrical appliances, light industry, aerospace, marine, military, and other industrial sectors has been widely used . With China's metal cold extrusion techniques and die industry, has been able to produce high- precision cold extrusion dies and equipment . Northwest Rubber plant commissioned by the C-13 core and jacket pipe joints were studied an extrusion extrusion extrusion process analysis and process analysis extrusion Figure 1.1 shown in Figure 1 , (a) for the tube connector Jacket (C-13) of the parts diagram , (b) φ9 mm inner diameter core tube fitting (JWT-13 × 2) part drawings . Technical requirements: heat 180HB ~ 210HB, surface passivation treatment , coating thickness of 0.008 mm ~ 0.015 mm.

Engineering machinery hydraulic fittings leak-proof measures

We used pipe joint R seal structure has been improved since 1996, has been in the application of hydraulic excavators and other equipment , to effectively solve the problem of  Hydraulic adapters system leak . ( 1 ) Welded pipe joints ( see Figure 1 ) This type of pipe joints using face O-ring seals , in theory , after tightening the nut body and welded pipe joints should be along the same line , welded pipe end face of the whole plane will pressure the seal ring and the joint body to achieve the purpose of sealing . However , in general, making conditions difficult to ensure welding flange and welded tubes perpendicular to each other , so when tightening the nut and fitting body after body and welded pipe fittings are not necessarily on the same axis line , welded pipe and the axis of the joint body will form an angle α, as shown in Figure 1 . The welded pipe is rigidly connected , so the angle α will always exist , thus affecting its sealing. To this end , we developed a special positioning welding fixture , ensuring their end flanges welded pipe welded to vertical degree requirements , so as to solve this type of pipe joint sealing problems. ( 2 ) This type of union fittings used in construction machinery more , in theory , it 's good sealing performance , but in actual use union was more common phenomenon of oil spills . This connector is used in require frequent disassembly and requires its seal better place .

Correctly identify the introduction of hydraulic fittings on the device

Country from abroad a large number of hydraulic equipment and devices. Therein. Various hydraulic fittings are easy to wear and tear one piece . At present, no international a unified international standard Hydraulic tube fittings , while the bow a feed device type hydraulic fittings weigh more, varies greatly, which gives maintenance has brought great difficulties. In this paper, the international community has primarily affects five national standard pipe fittings, its structure, characteristics and uses of national or regional differences such as profiles, lists a brief introduction ( see table ) , for reference. Table towel fittings not all listed on mechanical equipment, hydraulic systems, following the more widely used pipe fittings : ts person E J51437. Flared fittings is the world's most widely used as a connector. But it has a weak gasoline and other connectors with the same specifications as compared to the torque sensitivity is higher, namely anti- torque force is weak, if the mounting angle is not appropriate in the case of easy to produce high-pressure leaks .

Correctly identify the introduction of hydraulic fittings on the device

Introduction of hydraulic equipment in the common national standard connector structure , characteristics, manufacture and use of such countries into regional differences profiles , lists a briefing for the relevant comrades in actual use and identification of reference. Major international Hydraulic hose fittings  types, characteristics and status of the country or region Qian Annex. These hydraulic fittings , many connectors are widely used ] : Various equipment hard pressed devices, but not all of these connectors , according to the production of the imported equipment used in countries or regions and manufacturer of hydraulic components , narrowing the choice range of standard fittings , and finally according to their structural characteristics , determine the connector labeled heap.

Affect the performance of hydraulic hose connector assembly structure and process factors

First, the composition of hydraulic hose connector assembly and the classification by the hydraulic hose connector assembly and the metal hose joint of two parts ( Figure l, 2). Mainly on working pressure range and form of connection hose and connectors to classify . ( Twenty {'), j Figure 1 withhold algae Hao Qian Figure 2 detachable 1 Press the working pressure range category 1 ) Low working pressure 3MPa the following , mainly cotton ( fiber ) braided hydraulic hose . Mainly used to control oil ,  Hydraulic tube fittings brake lines and some machine tools . 2 ) working pressure in pressure between the three one 10Mpa , primarily steel wire braided I, Type III Chase Drive ( towel 25 or more ) hydraulic hose . Mainly used in low pressure oil and return line . Ah 3 ) High working pressure at 10 ~ 31.SMPa of the question , mainly steel braided D25 below I, l, l 1990 l of type and wire winding pipe . Mainly used in high-pressure systems . 4 ) high pressure working pressure 31.SMPa above , mainly in the following wire diameter 31.5 Pipe . With the development of EHV power hydraulic machinery , its growing demand .

Hydraulic hose assembly and metal connector design points

Hydraulic hose assembly as transmission fluid , transmission pressure with temperature is generally a 35 ~ 80oC, cheaper than steel braided flexible conduit pipe components, widely used in the hydraulic system, and high, mainly used for high pressure , high pressure piping . Has to prevent vibration, impact mitigation , reducing eccentric pipe for 1.2 resin hose . Its performance has a direct impact on the operation of the entire Hydraulic pipe fittings system for the inner layer of nylon door , reinforcing layer of polyester fiber line . Hose assembly abnormalities, such as bubbling tube , internal blocking , weaving, outer layer made ​​of polyurethane , with a temperature of a 40 rupture , leaking joints , fittings pull off , and this will cause fluid ~ 93oC, pressure up to 35MPa, and rubber hose pressure system failure , or even a major accident . Therefore, the combined ratio with a light weight outer and inner diameter ratio is small, fluid resistance is small , the rationale for the design of hydraulic hose assemblies , hydraulic systems help to improve weather resistance , excellent oil resistance , good flexibility , abrasion resistance, life , simplify the structure, beautifying , reduce costs. Beautiful appearance and so on. Appropriate use of alternative hose woven wire compiled ____ . But high prices resin hose and a large diameter hydraulic hoses tree classification and selection .

Formation of sealing effect

Seal formation: dynamic seal is divided into non-contact seals and contact seals. Non-contact seal mainly a variety of mechanical seals, such as: graphite packing ring, floating ring seals; rubber composite seals and rubber seals belong portfolio contact seals, relying on filling in a sealed chamber in the pre-compression force, leakage channel Hydraulic hose fittings blocking sealing effect is obtained. Seals used in hydraulic systems are mostly static seal (seal), reciprocating seals (piston, piston rod seal) and rotating seal sealing effect of the factors affecting: Sealed structure selection and film forming, pressure, temperature, material compatibility resistance, dynamic seal in contact with the work surface of the material, hardness, geometry, surface finish. First, several anti-sealing material excellent in dielectric properties and characteristics 1, NBR: 2, silicone rubber: 3, fluorine rubber: 4, EPDM: 5, PTFE: 6, polyurethane rubber: 7, acrylic ester rubber:

Regardless of what kind of material, should have the following properties

Sealing material used at home and abroad are mostly polymer elastomer, there are a number of special conditions, the use of plastic and various metals. But regardless of what kind of material, should have the following properties:1, with some mechanical and physical properties: such as tensile strength, elongation strength, elongation;2, there is a certain degree of flexibility, hardness fit and compression set; 3, the working media, not prone to swelling, decomposition, hardening;4, wear, there are some anti-tear properties; 5, high temperature, low temperature aging.However, there is no sealing materials include all of the above properties, the need to work environment, such as temperature, pressure, media and sport mode to select Hydraulic adapters  suitable sealing material, and through the development of materials with recipe to meet certain requirements. Or the use of composite materials or a combination of two or more structures in the form of play to their strengths, to achieve more comprehensive results.

Hydraulic oil properties of the sealing member

Hydraulic oil for hydraulic drive system as the working medium, from the energy transfer, conversion and control role, while also playing the various components within the hydraulic system for lubrication, corrosion, rust and cooling effect. The hydraulic system plays a seal to prevent leakage of fluid from the joint surfaces, maintaining the pressure, to maintain the role of energy transfer or conversion.Jic hydraulic fittings  oil for hydraulic drive system as the working medium, from the energy tansfer, conversion and control role, while also playing the various components within the hydraulic system for lubrication, corrosion, rust and cooling effect. The hydraulic system plays a seal to prevent leakage of fluid from the joint surfaces, maintaining the pressure, to maintain the role of energy transfer or conversion.

Commonly used hydraulic hose assembly

Two, four wire winding hose
 High-pressure hydraulic systems, suitable for mineral oil hydraulic fluids, glycol hydraulic fluid and oil emulsion, suitable for high pressure and large flow systems.Temperature range: -40 ℃ ~ +100 ℃
Three, six wire spiral pressure hose
 High pressure hydraulic systems, suitable for mineral oil hydraulic fluids, glycol hydraulic fluid and oil-water emulsion.Temperature range: -40 ℃ ~ +100 ℃
 Hydraulic hose (hose) assembly is a Hydraulic adapters  system used in an auxiliary device. It is composed of high-pressure steel wire braided or spiral rubber hose and steel fittings made ​​by the withholding of special equipment used to connect various types of hydraulic components, hydraulic systems, mainly used in the operating temperature -40 ℃ to +100 ℃ conditions, the hydraulic power transmission or conveying water, gas, oil pressure medium, in order to ensure that the liquid circulation and transmission fluid energy

One, one, two wire braided hose

One, one, two wire braided hoseHigh pressure hydraulic system, suitable for mineral oilhydraulicoil,glycoloiland HydraulicferruleswateremulsionhydraulicmediumTemperaturerange: -40 ℃ ~ +100 ℃

Commonly used hydraulic hose assembly

Hydraulic hose (hose) assembly is a hydraulic system used in an auxiliary device. It is composed of high-pressure steel wire braided or spiral rubber hose and steel fittings made ​​by the withholding of special equipment used to connect various types of hydraulic components,  Hydraulic adapters , mainly used in the operating temperature -40 ℃ to +100 ℃ conditions, the hydraulic power transmission or conveying water, gas, oil pressure medium, in order to ensure that the liquid circulation and transmission fluid energy.

Use fabric hose

According to the nature of resistance to media layer can be divided into pipes, air pipes, lose acid pipe, pipeline heat tubes, etc., are widely used in industrial and agricultural machinery and equipment. Various types of fabric hose is different according to the medium,Hydraulic tube fittings  choice of appropriate materials, is used to transport the (positive and negative pressure conditions) a variety of liquid and powdered solid sticky fluid medium such as a flexible hose material.According to the nature of resistance to media layer can be divided into pipes, air pipes, lose acid pipe, pipeline heat tubes, etc., are widely used in industrial and agricultural machinery and equipment. Various types of fabric hose is different according to the medium, the choice of appropriate materials, is used to transport the (positive and negative pressure conditions) a variety of liquid and powdered solid sticky fluid medium such as a flexible hose material.

What is the industry standard for hydraulic hose

There are many standards such as GB ISO SAE DIN JISGB is a reference to the ISO standard , most companies are running GB ( nominal diameter 5mm-51mm)
You just know that your condition is what it looks like , according to the working conditions can be selected hose , Hydraulic pipe fittings  hose selection STAMP principles:S-SIZE dimensions , namely pipe inner diameter , outer diameter , lengthT-Temperature temperature, medium temperature, ambient temperatureA-Application Application for what purposes ,M-Media medium , what medium conveying solid, liquid, gas
P-pressure pressure , maximum working pressure number ( including system impact pressure )

Selection of five elements of metal hose

size hose DN , choose the type of connector ( mainly flanged , threaded connection, quick connector ) and the size of the metal hose , hose lengths.the actual working pressure of the hose under pressure , and then query corrugated metal hose nominal diameter and pressure gauges, decide whether to use stainless steel mesh cover types of metal hose . Hydraulic ferrules  medium hose in the chemical properties of the transmission medium , according to the corrosion resistance of the hose material , the parts of the material determines the hose .the temperature inside the hose and medium operating temperature range ; hose when working ambient temperature. High temperatures, the metal hose shall work under high pressure and temperature correction coefficient to determine the temperature corrected pressure to determine the selection of the correct pressure rating .state when used according to the state of the hose , metal hose with reference to the proper use and installation methods and hose compensation in settlement of optimum length . The length of the hose variety of sports state calculation and the minimum number of bends hose and minimum bend radius and other factors, parameters select the correct hose length, and correctly installed.

For the introduction of hydraulic hose assembly

High pressure hose assembly  is a steel wire braided hose and fittings  combinationHigh pressure hose assembly is a steel wire braided hose and fittings  combination. Connect the hydraulic system to ensure that all kinds of hydraulic components, fluid circulation and transfer of liquid energy . Link connector and hose into the form of withholding type Hydraulic hose fittings and detachable , piping systems linked with various forms of hose connector assembly , hose length is not limited , short to 0:00 meters to tens of meters , hope the user optionalSuitable for high-voltage transmission mineral oil , water-based hydraulic oil and water. Widely used in all kinds of engineering machinery, coal , steel hydraulic transmission device With oil resistance and weather resistance excellent special rubber manufacture, use copper wire braid reinforced , high pressure resistance, flex and pulse performance is good, can be -40 ~ +120 ℃ temperature range effect. Appearance Black Gyrosigma .

Courier -style diameter of 100 mm below the various metal hose connector

Courier -style diameter of 100 mm below the various metal hose fittings, quick loading and unloading of the required conditions of use, generally use fast style . It is commonly used special fluorine Jic hydraulic fittings  plastic or rubber "O" ring seal . When moving the handle after a certain angle , the equivalent of fingers long thread is locked ; "O" ring will be kept more tightly , the sealing performance is better. The structure in the fire , Battlefield , and other quick release must be quick occasion is most appropriate. Within a few seconds , without any special tools equipped with , you can open a group or butt joints

Flange disc diameter is 25 mm above the metal hose connector

Flange disc diameter of 25 mm above the metal hose joint , to withstand normal working pressure in the case in the main flange disc ( see Figure 2-5c). It fit the form of tongue and groove seal . Rotating a radial direction , but also axially slidable flange looper tension force of Hydraulic pipe fittings fastening bolts to connect two bodies . This structure sealing performance is good, but difficult process, the sealing surface is easy to bruise . Quick release is required for special occasions , you can tighten the bolts through the holes cut open , made ​​of quick-release flange .

Threaded diameter is 50 mm below the metal hose connector

Threaded diameter is 50 mm below the metal hose connector to withstand high working pressure in the case of multi- threaded to the main thread when tightened after the two connectors on the inner and outer taper surface closely with a hermetic seal . Cone angle is generally  Hydraulic hose fittings 60 degrees , 74 degrees is also useful . The structure , good sealing, but the installation must ensure two countertop concentricity. In order to solve practical engineering often seen repeated demolition, installation and easy concentric and other issues, can also be designed as conical connector mating with the ball .

In addition to excessive altitude

In addition to excessive altitude and high pump speed , this may result in excessively high vacuum pump inlet ( insufficient pressure ) Other factors include the oil from the tank when the pressure in the pump when pushing any factors can cause pressure drop , For example:① tank or suction tube clogged oil filter .② pipe bends , fittings or flanges.③ kinked hose or rigid pipe pits .④ local suction tube wall projections .However, the suction pipe itself also has drop , so make sure it is as thick , short and straight .When the pump is positioned higher than the fuel tank when the page can be directly deducted from the available oil pressure suction height. If you can not install the pump below the liquid level in the position , you should try to keep a high level .In the host has increased year by year , while imports nineties hosts are also expected to enter the maintenance peak in the imported Hydraulic tube fittings  and pneumatic components , approximately 30% of the spare parts for the repair .As the electronics industry , information industry, the rapid development of automobile industry , pneumatic components demand will grow significantly. Among them, high-performance, energy-efficient , miniaturized mechatronic pneumatic products will be demand growth.Hydraulic , pneumatic and sealing components and systems exports in recent years, there is a certain growth, particularly due to the host product exports increase , high performance and high reliability of hydraulic and pneumatic seals with host supporting a growing amount exported growth.

How to prevent cavitation

While the rest of the system cavitation can also occur , but the discussion here only to the pump .In order to prevent cavitation , make sure that the pump inlet pressure is highenough so that the oil pump oil parts ( piston , vane , gear teeth ) back from suction mouth filled space . Different types of pumps , the required pump inlet fluid pressure is different. Manufacturing technology , geometry, or a projection is to determine the minimum pressure ( maximum vacuum) factor.Inlet pressure must be measured at Hydraulic pipe fittings Hydraulic pipe fittings pump inlet . Low oil pressure value is a system that operates in the sea using petroleum oil based .For the pump , at an altitude of 1524m at both the pump from the mailbox to drop more than a small , imported oil pressure has been lower than the pump rating. But take a larger safety factor will ease this situation. The solution is to slow down the pump speed in order to reduce the inlet pressure oil pump parts are not " out " oil.In addition to excessive altitude and high pump speed,thismayresultinexcessivelyhigh vacuum pump inlet ( insufficient pressure ) Other factors include the oil from the tank when the pressure in the pump when pushing any factors can cause pressure drop ,