The check valve is also called cut-off valve, one-way valve, re-flux valve and counterbalance valve, it can automatically open and close valve clack and prevent the back flow of medium. Also, the check valve can be used on the alimentative pipe that has high pressure which may even higher than system pressure. | |
Standards | |
Design and Manufacture | API 6D,ASME B16.34,API 594,BS 1868,GB/T 12235,GB/T 12236,JB/T 8937 |
Face To Face Dimension | ASME B16.10,API 6D,GB/T 12221 |
Connection Dimension | ASME B16.5,ASME B16.47,ASME B16.25,GB/T 9113, JB/T 79,HG/T 20592 |
Test and Inspection | API 598,API 6D,GB/T 13927,GB/T 26480 |
Check Valve Structural Features | |
Check valve has compact structural, good air tightness and good property. | |
Clear passageway with small friction. | |
It hardly has water hammer situation since the impact force is small when it is closed | |
Here are three type of check valve named Lift check valve, Swing Check Valve and Butterfly Swing Check Valve. | |
Connection type: threaded, welded, flange, and wafer. | |
Seat sealing surface can be sprayed on cemented carbide at customer's request, with separate threaded seats or welded seat structures. | |
Main Material | |
A216-WCB/WCC, A216-LCB/LCC, A351-CF8/CF8M/CF3/CF3M/CF8C, A105, F304/316, etc. | |
Pressure Range | |
CL150～CL2500; PN10～PN420 | |
Size Range | |
1/2”~48”; DN15~DN1200 | |
Temperature Range | |
-196℃～+600℃ | |
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