Introduction of YW-Lok series tube fittings products Yuwei-Lok company's products (YW -Lok) have adopted international mainstream double ferrule sealing technology, variety of materials create suitable high quality ducts and pipe joints applied to the high pressure conditions for the users' requirement. Yuwei-Lok series of pipe fittings’ development is to meet customers' rapid increasing demand of the high pressure conduit fittings. This series of pipe fittings applies to petrochemical, fluid, power generation, nuclear power, electronics, instruments and other major industries. Yuwei Lok series manufacturing process of pipe fittings and testing method are very meticulous. So it can satisfy people's demand for high-performance pipe joints, such as: high pressure, impact and vibration, vacuum and high temperature, etc. Material's compatibility, appropriate levels, corrected installation. The whole system’s safety must be considered ensure, stable performance. System's operation