H44H Swing Check Valve
H44H/W Stainless Steel Swing Check Valve
H44H/W GB Swing Check Valve GB Swing Check Valve
H44W/H/Y API Swing Check Valve
H41W/H GB Lifting Check Valve
H41W/H Stainless Steel Lift Check Valve
H42W Stainless Steel Vertical Check Valve
H71W/H/Y Clamp Connection Lift Check Valve
H76H/W Clamp Connection Double Disc Swing Check Valve
H41N-25/40 LPG Check Valve
H42N Vertical LPG Check Valve
BH41W/H Insulation Check Valve
FV075 Lug On Clip Double Disc Check Valve
Check Valve summary
Check valve is also known as reverse flow valve, check valve, back pressure, one-way valve.These valves are automatically opened and closed by the force generated by the flow of the medium itself in the pipeline, which belongs to an automatic valve.Check valves are used in piping systems, and their main functions are to reverse the flow of submesh media, to prevent the pump and its drive electric reversal, and to release the medium in the container.Check valves can also be used to supply a line in which the pressure may rise above the main system pressure to the auxiliary system.
Check Valve standard
Check Valve Execution standard:
Type | Design and Manufacture | Length of the structure | Flange dimensions | Pressure and temperature | Test - test |
Swing check valve | GB12236 | GB12221 |
GB9113 JB79 |
GB9131 |
GB/T13927 JB/9092 |
Lift check valve | GB12235 |
Nominal pressure | 1.6 | 2.5 | 4.0 | 6.4 | 10.0 | 16.0 |
Strength test | 2.4 | 3.8 | 6.0 | 9.6 | 15.0 | 24.0 |
Water seal test | 1.8 | 2.8 | 4.4 | 7.0 | 11.0 | 18.0 |
Gas seal test | 0.5-0.7 |
Check Valve Material and performance of main parts:Material and performance of main parts:
Body, cover, plate | Valve stem | Sealing surface | Gasket | Sealing surface | Working temperature℃ | Applicable medium |
WCB | WCB | 1Cr13 |
Reinforced flexible graphite 1Cr13/Flexible graphite PTFE Gear gasket |
13Cr STL Material nylon |
≤425 | Water vapor oil products |
WC6 | WC6 | ≤540 | ||||
WC9 | WC9 | ≤570 | ||||
ZGCr5Mo | ZGCr5Mo | ≤550 | ||||
ZG1Cr18Ni9Ti | ZG1Cr18Ni9Ti | ZG1Cr18Ni9Ti | ≤200 | Acetic acid class | ||
ZG1Cr18Ni12Mo9Ti | ZG1Cr18Ni12Mo9Ti | ZG1Cr18Ni12Mo9Ti | ≤200 | Acetic acid class |