Check Valve

It is a high-efficiency energy-saving product developed by the design team by introducing multiple research achievements in the4 inch flanged check valve, water conservancy, water pump, and other industries on the basis of the extensive collection, research and summary of the performance of similar products at home and abroad. We have our own water test system, for each new research and development and production of complete valve working condition of simulated test and flow resistance test, to determine each non slam check valve to meet customer requirements, but also by the sign long-term strategic cooperation agreement with are abundant in China third-party inspection agencies of the state detection and authority issued by the third party test report.

For water supply check valves' spring and the importance of the disc is self-evident, so for every spring, we all use caliper for geometry size, using spring testing machine load force test, high frequency fatigue testing machine with a spring fatigue test to ensure that every spring can meet at first, the design of the state so as to ensure the normal state of the water check valve to open and close. For the disc, we use numerical control equipment to process all the disc. After the processing, we do the geometric dimension test for each disc to ensure the size match. Because of this, ZhengFeng's check valve feedback in the market is very excellent, usual customers with slow, quiet, low flow resistance to praise.