H41H flange forged steel check valve has three bonnet design forms. The first is a bolted bonnet. The valve designed according to this design form has a bolt and nut connection between the valve body and the bonnet, and spiral wound gasket (316 It is made of flexible graphite) for sealing. If customers have special requirements, they can also be connected by metal rings. The second design form is a welded bonnet. According to this design form of valve, the valve body and bonnet are connected by threads, all welded Sealing. If customers have special requirements, they can also use penetration welding connection. The third type is pressure self-tightening bonnet. The valve designed according to this design form has a threaded connection between the valve body and the bonnet, and the internal pressure self-tight ring seal .

Structural features of H41H flange forged steel check valve:

1. Full diameter or reduced diameter

2. Lift check valve

3. Ball check valve

4. Swing check valve

5. Built-in springs as required

6. Bolt connection, spiral wound gasket sealing bonnet, threaded connection, fully welded sealing bonnet and threaded connection 

7. Connecting internal pressure self-tightening bonnet

8. Integral upper sealing seat

9. Socket end conforms to ASME B16.11

10. Threaded connection end (NPT) conforms to ANSI/ASME B1.20.1

11. The valve disc can be changed into throttle type, needle type, ball type