Integrated Backflow Prevention
Check Valves
Swing, lift-up and dual-plate wafer check valves that automatically arrest reverse flow — protecting pumps, compressors and downstream process equipment.
BS 1868API 594API 6DASME B16.34
Key features
Design highlights
- Swing disc design with minimal pressure drop
- Lift-up configuration for vertical installations
- Dual-plate wafer design for tight installations
Operational advantages
Field performance
- Automatic backflow prevention, low maintenance
- Low pressure drop in forward flow
- Reliable across varying flow rates
Technical specifications
Manufacturing range
| Type / Rating | MOC (Body/Seat/Trim) | Mfd Std | Size Range | End Conn. | Hydro Body | Hydro Seat | Air Test |
|---|---|---|---|---|---|---|---|
| Swing NRV — 150# | WCB, SS316 | BS 1868 | 2" — 36" | RF | 425 psig | 315 psig | 7 kg/cm² |
| Swing NRV — 300# | WCB, WC6, CF8M | BS 1868 | 2" — 24" | RF | 1125 psig | 825 psig | 7 kg/cm² |
| Swing NRV — 600# | WCB, WC6, CF8M | BS 1868 | 2" — 24" | RF | 2225 psig | 1630 psig | 7 kg/cm² |
| Lift-Up NRV — 150# | WCB, SS304, SS316 | BS 1868 | 2" — 12" | RF | 425 psig | 315 psig | 7 kg/cm² |
| Lift-Up NRV — 300# | WCB, SS304, SS316 | BS 1868 | 2" — 12" | RF | 1125 psig | 825 psig | 7 kg/cm² |
| Dual Plate — 600# | WCB, CF8, CF8M | API 594 | 2" — 24" | Wafer / Lug | 2225 psig | 1630 psig | 7 kg/cm² |
| Dual Plate — 900# | WCB, CF8M | API 594 | 2" — 24" | Wafer / Lug | 3350 psig | 2450 psig | 7 kg/cm² |
Inspection & test: 100% in-house hydrostatic and pneumatic testing for body and seat per API 598. All valves undergo rigorous dimensional verification and material traceability protocols.
Bespoke engineering: non-standard sizes, grades and pressure classes are available on request. Custom material and body/end configurations produced on project basis.