The pressure seal valves are designed in accordance with API600 and ASME B16.34 for service of high temperature and high pressure and are widely used in fossil fuel power plant. Compared with bolted bonnet joint 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.

Technical specification
Design & manufacturing standard as per API 600
Face to face standard as per ASME B16.10 / API 6D
Fanged ends standard as per ASME B16.5 / MSS-SP-44/ASME B 16.47/ASME B 16.25
Testing & inspection standard as per API598 / API 6D

Product Range
Body material: Carbon steel, Stainless steel, Alloy steel ,Monel, Duplex, Inconel
Size range(s):1/2"～60"
Pressure rating: Class900～Class 2500
End connection: RF, RTJ, BW
Working temperature: -46℃～+560℃
Mode of operation: Hand wheel, gear box, Electric , Pneumatic , etc.

Design Features
The valve self-sealing type bonnet.
The disc wedging phenomenon is not liable to be caused when temperature rises.
Flexible wedge.
Full stellite overlay seat sealing surface
Full wedge guiding design.
Absolute bonnet joint leak proof.
Optional by-pass design.