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Baigang valve group brand manufacturing -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
Check valve pressure test:
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
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