A216 WCB Flange Gate Valve 150lb ASME 16.34
CLASS 150lb~2500lb CAST Steel Flange Gate Valves
OS&Y, Rising stem, Flexible Wedge, Single Wedge, full bore
Bolted Bonnet/Bolted Body, Threaded or Welded seat ring /Insert Seat
ASTM A216 WCB, A217 WC6, A351 CF8, A351 CF8M, A351 CF3, A351 CF3M, A351 CN7M
Face to Face
End to End
Main Design Features for Pressure Sealed Butt Weld Gate Valve
Our Valves can adopt pressure seal bonnets to allow high pressure service, typically in excess of 15 Mpa (2250 psi). The main feature about the pressure seal bonnet is that the body-bonnet joints seals improves as the internal pressure in the valve increases,compared to other constructions where the increase in internal pressure tends to create leaks in the body-bonnet joint.
Internal pressure forces the bonnet upwards against the gasket,creating forces in the contact areas between the gasket and the bonnet and between the gasket and the body.