Forged Steel Check Valve

Application

Forged Steel Check Valve valves are available in Three bonnet designs. The first design is the Bolted Bonnet, with male-female joint, spiral wound gasket, made in F304+flexible graphite. Ring joint gasket are also available on request. The second design is 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, ball check, or swing check designs.

Structure features

• Full port or reduced port;

• Lift type check valves;

• Ball type check valves;

• Swing type check valves;

• According to requirement to equip inside spring;

• Bolted bonnet with spiral-wound gasket, threaded and seal welded bonnet or threaded and pressure seal bonnet;

• Socket weld ends to ASME B16.11;

• Screwed ends (NPT) to ANSI/ASME B1.20.1;

• Disc can change for soft seal disc and ball disc.

Design Construction

1. Structural formation: Bolt-jointed bonnet lifting type, bolt-jointed bonnet swing type check valve

2. Design standard: ASME B16.34, BS5352

3. Face to face: ASME B16.10

4. Flanged ends: ASME B16.5

5. Thread ends: ASME B1.20.1

6. Socket welded ends: ASME B16.11

7. Test & inspection: API 598

Notes: The sizes of valve connecting flange and butt-welding terminas can be designed according to customer's requirement.

Major Parts Material Form

Main Size of Outside & Weight

Class 800 (Piston type)

Class 1500 (Fasten the opening type)