Sangong forged steel check valves

Sangong forged steel check valves are available in three bonnet designs.
The first design is the Bolted Bonnet, with male-female joint, spiral wound gasket, made in F304l/graphite. Ring joint gasket is available on request. The second design is in the welded bonnet, with a threaded and seal welded joint. On request a full penetration strength welded joint is available. The third design is the pressure seal bonnet, with a threaded and pressure seal bonnet joint. The check valves are also available in three different design configurations. These are piston check valve type, ball check or swing check types.

Construction is as follows

1. Full port or conventional port

2. Lift check valve type

3. Ball check valve type

4. Swing check valve type

5. Acceding to requirement equip inside spring

6. Bolted bonnet with spiral-wound gasket, threaded and seal welded bonnet or threaded and pressure seal bonnet

7. Socket weld ends to ASME B16.11  Screwed ends(NPT) to ANSI/ASME B1.20.1
9. Disc can change for soft seal disc and ball disc.

Application standards

Check valve design and manufacture conform to BS5352, MSS SP-118
Connection ends conform to
1)Socket welded dimension conform to ANSI B16.11
2)Screw ends dimension conform to ANSI B1.20.1
3)Butt-welded conform to ANSI B16.25
4)Flanged check valve ends conform to ANSI B16.5

Test and inspection conform to: API 598