API Check Valve
Cast Steel Swing Check Valves
1) Design and manufacture: API6D,API594,JB/T8937
2) Test and inspection: API598
3) Face to face dimensions: API594,API6D,DIN3202,JB/T8937
4) Flanged end: ASME B16.34
Swing Check Valve Features:
The valve is closed by the reversing flow medium and the weight . The valve is closed by two stages of quick and slow closing which prevents the pump from
Turning back and superhigh water hammer pressure. The weight on the shaft balance the force during opening to reduce the flow resistance
This kind of valves are automatic type which are opened by the pressure of the medium and closed by the reversing flow. The water hammer rising has been taken into consideration during design so it is reliable.
MATERIALS OF MAIN PARTS
2) Class: 150LB to 2500LB
3) Type: Bolted Cover, Swing Disc, Threaded or Welded seat ring
4) Material: WCB, WCC, WC6, WC9, C5, C12, CF8, CF8M, CF3, CF3M, CN7M, LCB, LCC, DUPLEX SS, MONEL, ALLOY 20, CAST IRON etc
5) Operation: Lever with counterweight(option)Main features and applications
1. Products using pin axis structure of built-in type, reduce leakage, the use of more reliable.
2. Valve disc rotate around the valve seat outside the axis, reduce the impact of the closure, suitable for horizontal or vertical installation.
3. Product design and manufacture according to API standard, reliable sealing, good performance, and can be used with imported equipment.
Standard materials of parts
|1||Body||ATM A216 WCB|
|2||Seat ring||ASTM A105 + 13Cr|
|3||Disc||ASTM A216 WCB + 13Cr|
|4||Disc nut||ASTM A182 F6|
|5||Hinge||ASTM A216 WCB|
|6||Hinge pin||ASTM A182 F6|
|7||Gasket||Stainless steel and graphite spiral wound|
|8||Cover||ASTM A216 WCB|
|9||Cover bolt||ASTM A193 B7|
|10||Cover nut||ASTM A194 2H|