Pressure Seal Butt Welding Gate Valve
The pressure seal valves are designed 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
Rational structure reliable sealing,excellent performance and nice
Regardless of operating-temperature changes,the bonnet ioint
remains leak proof.This is insured by stainless steel inlay in the
body gasket area.The sealing pressure is in direct proportion to
the internal pressure.
Advanced pressure seal designed body and pure graphite gasket rings
to ensure high tightness and comply with the healthy and safe
environment requirements for fugitive emissions control.
Main Parameter Specification
Design and Manufacture:Cast Steel Gate Valve to API 600(ISO
10434),API 6D;Cast Stainless Steel Gate Valve to API 603,API 600
Inspection and Test:API598,API600 or API 6D
End Flange Dimension:ASME B16.5(for NPS≤24,ASME B 16.47 series
B,API 605,ASME B16.47 A Series,MSS SP-44(for NPS>24)
BW end Dimension:ASME B16.25
Face to Face and End to End:ASME B16.10
Pressure-temperature ratings:ASME B16.34
Body material: WCB, WC6, WC9, LCB, LC1, C5, CF8, CF8M, CF3, CF3M, CF8C, CN7M,
Hastelloy C, etc.
End Connection: RF,RTJ, BW
Pressure range: Class150~2500(PN16~PN420)
Operation: Hand wheel,Gear,Electric Actuator,etc.
Main Parts and Materials
|6||Sealing Ring||Graphite , Soft steel|
Gate valves with NPS>=2 are flexible gate,gate valves with with
NPS<2 are of solid gate.
If being requested by the customer,the Belleville spring loaded
packing impacting system can be adopted for
enhancing the durability and reliability of the packing seal.