The check valve is a valve which automatically opens and closes valve disc depending on the flow of the medium itself, and it is also used to prevent medium from flowing backwards. It is also called single direction valve, no-return valve and back pressure valve. It is a kind of automatic valve, main function of check valve is to prevent the reverse flow of the medium, prevent the reversal of the pump and drive motor, and the discharge of the container medium.
Production Size: 1 1/2"~24".DN40~DN600.
Pressure: 150LB.
Design Standard: MSS SP-71.
Face to Face: ANSI B16.10.
Flange Standard: ANSI B16.1.
Testing Standard: API 598.
Body: ASTM A126B.
Bonnet: ASTM A126B.
Stem: 2Cr13, SS304, SS316, carbon steel.
Hanger Pin: Stainless steel.
Hanger: ASTM A536 65-45-12.
Disc: ASTM A126B.
Seat: Brass, Bronze, EPDM, NBR.