qilong valve certficate

Check Valves

   Check Valve, also known as a one-way valve or Check Valves. Pipeline used to prevent reflux of a fluid valve. So pipeline fluid can only make one-way flow of fluid when the clock back, the flap valve can be shut down automatically to prevent backflow. According structure can be divided into two categories : elevating and spin-Kai (or a shake-flap). Former perpendicular to the valve flap valve passageway movements with Valve are generally designed as a cut-off valve and valve common. The latter is a flap valve around the sealing surface for rotating movement, resistance than elevating small, poor sealing performance.

Cast Steel Swing Check Valve

Design and Manufacture ANSI B16.34,API600,API6D,BS1868
Face to face(end to end) ANSI B16.10,API6D
Flanged connection 2"~24" to ANSIB16.5,26"~36" to MSS-SP-44 to API605
Butt welded end ANSIB16.25
Test and inspection API598,API6D

Forge Steel Check Valve

Applicable standards:
Design STD: API 602,ASME/ANSI B16.34
Face To Face: ASME B16.10
Flange End Connection: ASME/ANSI B16.5
Welded End Connection: ASME/ANSI B16.25
Inspection And Test: API598