Wafer Type Non-Return Valve
KBN Engineers Wafer Type NRVs prevent reverse flow while taking up a fraction of the space of a conventional swing check valve. The thin wafer body is clamped between two pipe flanges, which keeps weight and installation cost low.
Made in WCB carbon steel and CF8 / CF8M stainless steel and tested to API 598: 425 Psi (30 Kg/cm²) body, 300 Psi (21 Kg/cm²) seat, plus a 7 Kg/cm² pneumatic air test.
Technical Specifications & Parameters
| Parameter | Technical Specification Value |
|---|---|
| Material of Construction (M.O.C) | WCB / CF8 / CF8M |
| Manufacturing Standard | API 600 |
| Testing Standard | API 598 |
| Pressure Rating | Class 150#, 300# & 600# |
| Size Range | 25 mm to 250 mm |
| Body Pattern | Wafer type, fitted between flanges |
| Hydro Test Pressure - Body | 425 Psi (30 Kg/cm²) |
| Hydro Test Pressure - Seat | 300 Psi (21 Kg/cm²) |
| Pneumatic Air Test | 7 Kg/cm² |
Compact Wafer Design
Much shorter and lighter than a swing check valve, ideal where pipeline space is limited.
Tested to 425 Psi Shell Test
Every valve is hydro tested on body and seat and air tested according to API 598.
Automatic Backflow Stop
Closes on its own when flow reverses, protecting pumps and upstream equipment.
Need Compact Check Valves for Tight Pipelines?
We supply Wafer Type NRVs from 25 mm to 250 mm in Class 150#, 300# and 600# with WCB or stainless steel bodies.