NRV — Non-Return Valve

An NRV (non-return valve) prevents reverse flow. Supreme Valves supplies WCB swing checks, dual plate wafer checks and specialty alloy checks for pump discharge, steam headers and process lines.

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NRV types we manufacture

• WCB swing check valve (NRV) — BS 1868 / API 6D practice, bolted cover
• Dual plate wafer check — short face-to-face, reduced slam
• WCB check valves hub — full cast steel check range
• Swing check vs dual plate comparison

When to use which NRV

Use a swing check on many horizontal pump discharges and steam lines. Use a dual plate wafer check when face-to-face is tight or slam risk is high. Confirm orientation, media and class on the RFQ. Selection guide: swing check / NRV selection.

RFQ checklist

1. NRV type (swing / dual plate / lift)
2. Size, class, ends
3. Flow direction and installation orientation
4. Media, pressure, temperature
5. Slam / water hammer concerns
6. Material (WCB, SS, NAB, Alloy 20)

Also: NRV RFQ India · Check valve manufacturer · Tools