Product specification
Cast & Forged Steel Check Valves
Swing, lift and piston check designs to 30", engineered to close cleanly and quietly on reverse flow.
Overview
A check valve is only as good as its behaviour in the first second of reverse flow. Our swing and lift check designs are dimensioned to minimise slam, protect upstream equipment and hold their seat over thousands of cycles.
Design features
- Swing disc geometry tuned for low cracking pressure and controlled closure
- Renewable seat ring, hard-faced for erosive media
- Bolted cover with hinge pin accessible without line removal
- Optional counterweight and damper arrangements
- Piston and ball check variants for pulsating service
- Non-slam behaviour verified during functional testing
Size & pressure class range
| Size range | Pressure class |
|---|---|
| 2" – 30" | Class 150 |
| 2" – 24" | Class 300 / 600 |
| 2" – 6" | Class 900 / 1500 / 2500 |
| 1/2" – 2" | Class 800 (forged lift check) |
Sizes and classes outside this table are reviewed on enquiry against available patterns and forging stock.
Design standards
- BS 1868
- API 6D (on request)
- API 602
- ASME B16.34
- ASME B16.10
- IBR
Body & trim materials
- Carbon steel: A216 WCB, A105, LCB, LF2
- Alloy steel: WC6, WC9, C5, C12, F22
- Stainless steel: CF8, CF8M, CF3M, F316
End connections
- Raised-face flanged
- Butt-welded
- Socket-welded
- Screwed NPT
Testing
- Hydrostatic shell & seat
- Air seat test
- Back-flow seat verification
Temperature range
-196 °C to +550 °C depending on trim and body grade
Typical applications
Where this valve family usually lands.
Pump Discharge Lines
Oil & Gas
LNG Terminals
Power Generation
Also manufactured
Related valve families.
Next step
Need check valves against a specific datasheet?
Share the size, class, metallurgy, end connection and test requirement. We will confirm feasibility and lead time.