Common Check Valve Selection Table
1 H41 Flanged Lift Through-way Type Flange ＜DN50 Horizontal installation only Relatively high flow resistance.
Sealing performance is dependent on medium pressure.
Disc returns to seat via gravity.
Long face-to-face (structure) length.
Heavy weight.
Higher cost compared to wafer-type valves.
The main check valve product names of China Check Valve Network include:No-load Running Check Valve，Flange Jacket Insluation Check Valve，Flange Tiny Drag Slow Close Muffler Check Valve，Flange Tiny Drag Slow Close Butterfly Type Check Valve，Flange Vertical Check Valve Flange Single Disc Swing Check Valve，Hydraulic Lift Check Valve
2 H44 Flanged Swing Check Valve (Single Disc) Flange ≥DN50 Horizontal installation only Relatively high flow resistance.
Sealing performance is dependent on medium pressure.
Disc returns to seat via gravity.
Long face-to-face (structure) length.
Heavy weight.
Higher cost compared to wafer-type valves.
3 H71 Wafer Lift Check Valve Wafer ＜DN50 Horizontal / vertical, horizontal preferred Relatively low flow resistance.
Sealing performance is less affected by pressure.
Disc returns to seat via spring force.
Short face-to-face (structure) length.
Light weight.
Lower cost compared to flanged-type valves. Check Valve Products
4 H76 Dual Plate Wafer Check Valve Wafer ≥DN50 Horizontal / vertical, horizontal preferred Relatively low flow resistance.
Sealing performance is less affected by pressure.
Disc returns to seat via spring force.
Short face-to-face (structure) length.
Light weight.
Lower cost compared to flanged-type valves.
Structure Diagram：
H41 Flanged Lift Check Valve
H44 Flanged Swing Check Valve (Single Disc)
H71 Wafer Lift Check Valve
H76 Wafer Dual Plate Check Valve
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