Cast Iron Reflux Valve PN10 (Swing Check)
Flanged cast iron swing check (reflux) valve to IS 5312 / BS 5153 that prevents reverse flow and protects pumps in water supply and distribution systems.
A reflux valve is a swing-type check (non-return) valve widely used on the discharge side of water pumps to prevent backflow and water-hammer damage. The Supreme cast iron reflux valve is built to IS 5312 / BS 5153 with a cast iron body, gunmetal or rubber-faced disc, and a bolted cover for easy maintenance.
Technical Specifications
Features & Options
- Swing disc opens with forward flow and closes on reversal to prevent backflow
- Bolted cover for in-line inspection and seat/disc maintenance
- Rubber-faced disc option for drop-tight, low-noise closure
- Lever-and-weight or lever-and-spring options to reduce slam and water hammer
- Single-door and recoil (non-slam) configurations available
Frequently Asked Questions
What is a reflux valve?
A reflux valve is another name for a swing check (non-return) valve, used mainly in waterworks on pump discharge lines to allow flow in one direction only and prevent reverse flow when the pump stops.
How does a reflux valve prevent water hammer?
By closing as flow reverses, the disc stops backflow. Lever-and-weight or lever-and-spring (or non-slam recoil) versions accelerate closure to minimise the pressure surge (water hammer) that can damage pumps and pipework.
What sizes are available?
Cast iron reflux valves are available from DN50 to DN600 (2" to 24") in PN10 (and PN16 on request), flanged to IS 1538 / ASME B16.1.
Need Reflux / Check Valves for a Pumping System?
Request a technical datasheet, material certification details, or a project quotation from our engineering team. We export to Saudi Arabia, the UAE, and across the Gulf.