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Stainless Steel Long Series Single Disc Spring Check Valve

Wafer disc check valve is applicable for various pipelines with nominal pressure of PN1.0 Mpa~42.0Mpa,Class 150LB~2500LB and nominal diameter of DN15~1200mm,NPS 1/2-48 and working temperature of -196~540 degree Celsius to be used for protecting from medium backflowing.
Product Details

Stainless Steel Long Series Single Disc Spring Check Valve

Key design features:

Retainerless body design with no external body penetrations eliminating the possibility of outside leakage. Disc assembly secured in place by high strength key.

End gasket surfaces are uninterrupted with no screws or lock pins breaking the gasket surface. No gasket restrictions required.

Seat faces lapped for smooth finish and superior sealing.

High torsion inconel springs for quick closing.

Each valve is shell and seat pressure tested per industry standard API 598.

Available in Wafer, Lug and Double Flange styles.

Each valve has a unique certification number that is traceable to the valve certification sheet which includes MTR data, pressure test report, and inspection report.

Function Description:


Body: Carbob steel, Stainless steel
Disc: Stainless steel
Hanger: Carbob steel
Seal ring: Synthetic rubber
Spring: Stainless steel
Axle: Stainless steel

Normal pressure: 1.6Mpa
Sealing test pressure: 1.76Mpa
Strength test pressure: 2.4Mpa

Design According to API 594

Face to face according to API594

Pressure & Temperature Rating according to ASME B16.34

Test & inspection According to API 598

Suitable medium: Water, Natural Gas, Oil and some corrosive liquid
Flange connection conform to: DIN2632, PN10/ DIN2633, PN16

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