1.API 6D certificate 2.CE certificate 3.Prevent fluid backflow valve 4.Valve cover bolt connection can be replaced or welded

Check valve(API 6D series)

• Is automatically to prevent fluid backflow valve. Check the valve flap to open under pressure in the fluid, a fluid from the inlet side to the outlet side. When the import side pressure lower than the export side, the fluid pressure valve itself, factors such as the role of gravity automatically close to prevent fluid backflow.

Design / manufacturing standards:

 

•Steel check valve design standard: BS1868/ API6D / BS5352/ API 602 / ISO 15761/ ASME12224B16.34GB / T, GB / T 12236

•Structure length standard: ASME B16.10

•The end flange standards: SME B16.5( for NPS = 24, not 22), MSS SP-44( for NPS = 22) ASME B16.47( for NPS > 24)

•Butt weld end standard: ASME B16.25

•Socket welding end standards: ASME B16.11

•Threaded end standards: ASME B1.20.1

•Test standards: API 598/ API6D

 

Design / production description:

 

•Valve cover bolt connection can be replaced or welded seat, can body surfacing stainless steel or hard alloy, also can according to requirements increase soft sealing valve seat sealing ring 6D check valves full size design, flow resistance small cap seal:150LB uses powerful graphite gasket,300LB ~ 800LB stainless steel belt winding graphite gasket,900LB and above the metal pad ring, also can use the pressure self sealing structure connection form: RF, RTJ flange, butt welding, socket welding, threaded end.

API 6D Check Valve