H72(Y/W)
Sandwich check valve
Clamp check valve is also known as countercurrent valve, reverse check valve, back pressure valve, check valve. This kind of valve is automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, which belongs to an automatic valve.
Product parameters
Model number | Nominal pressure | Test pressure (MPa) | Operating temperature (℃) | Medium of application | |
Shell shell | Seal up | ||||
H77X | 1.0 | 1.5 | 1. 1 | Soft seal seal：<80 Hard seal：<450 | Water, gas, |
| 1.6 | 2.4 | 1. 76 | |||
| 2.5 | 3.75 | 2.75 | |||
| 4.0 | 6.0 | 4.4 | |||
| 6.4 | 9.6 | 7.0 | |||
Name of part | Materials and materials | ||||
10C、25(10c、16、25、64) | H77H-(16c、25、40、64） | H77H-（25I、40I、64I) | H77W-(16c、25c、25、40) | H77W-(10P、16P、25P、40P) | |
Valve body, butterfly plate | Cast steel WCB | Chromium molybdenum steel | Cast steel WCB | 1Cr18Ni9Ti | |
Valve stem | 2Cr13 | 1Cr18Ni9Ti | 2Cr13 | ||
Body seal ring | Nitrile rubber | Surfacing alloy welding | Hard alloy surfacing | - | - |
Auxiliary closing spring | 1Cr18Ni9Ti | Heat resistant alloy | 1Cr18Ni9Ti | ||