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 .