Forged steel check valve (sw/threaded end)
For check valves smaller than 2"(dn50), forged steel valves are introduced.Compared with castings, forged valve bodies offer the advantages of more uniform structure, greater density, higher strength integrity, enhanced dimensional characteristics and closer dimensional tolerances.
The design of forged steel check valves are also various:Swing disc / piston disc, full port, conventional port;Bolt bonnet, welded bonnet and pressure seal bonnet;Socket weld (sw), threaded, butt welded (bw) and flanged end.
Features of forged steel check valves (sw/threaded end):
Swing disc or piston disc type
Bolted bonnet, welded bonnet or pressure seal bonnet
Socket weld (sw), butt weld (bw), threaded end available
Applicable standards of forged steel check valves (sw/threaded end):
A) design & manufacture:API 602, BS 5352, ASME b16.34
B) face to face:ASME b16.10, en 558
C) connection end:ASME b1.20.1, ASME b16.11, ASME b16.25, ASME b16.5, en 1092
D) test and inspection:API598, en 12266
Sizes:1/2" - 2" or dn12 - dn50
Pressure rating:Class 150 - class 2500 or pn 16 - pn 420
Material of valve body:A105, lf2, f11, f22, f5, f304, f304L, f316, f316L, etc.
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