FYV’s high pressure seal check valve is suggested for better closure in high pressure condition, while bolted bonnet is still available for customer's option. The pressure seal design incorporates a metal-to-metal seal that becomes tighter as the pressure increases. The pressure seal valves are widely used in fossil fuel power plant. Compared with bolted bonnet valves, it provides absolute reliable sealing of the bonnet joint, so that the pressure seal valves are more compact and rigid as well as maintenance cost-effective at high temperature and high pressure service.
Design & manufacturing standard as per API 6D /BS 1868
Face to face standard as per API 6D / ASME B16.10
Fanged ends standard as per ASME B16.5/ASME B 16.47
Testing & inspection standard as per API598 /API 6D
Body material: Carbon steel, Stainless steel, Alloy steel ,Monel, Duplex, Inconel
Pressure Rating: Class900～Class 2500
End connection: RF, RTJ,BW
Only one sealing face is designed on the valve body and valve disc,
Full stellite overlay seat sealing surface
Absolute bonnet joint leak proof.
Optional by-pass design.
Pressure Seal Cover
Internal Hinge Pin Design Standard
Through-body Hinge Pin Design Available
Extra Lever, Counter Weight and Damper Available