Proven gravity-and-flow swing disc design for full-bore, low-resistance non-return duty across the broadest size and pressure range.
The cast steel swing check valve uses gravity and back pressure to seat a pivoting disc against a matching body seat ring. The full-bore, straight-through flow path produces minimal pressure drop in the open position, making it the most energy-efficient non-return valve for large-bore, moderate-velocity applications. The disc is accessible through a bolted cap for in-line inspection and maintenance.
VALVAX swing check valves are designed to BS 1868 and API 600 requirements. Available with or without outside lever and counterweight for applications where closure assistance is required. Hard-faced Stellite seats resist erosion in sand-laden streams and high-velocity service.
| Parameter | Value |
|---|---|
| Design Standard | BS 1868 / ASME B16.34 |
| Size Range | 2″ – 24″ (DN50 – DN600) |
| Pressure Class | ASME Class 150 – 900 |
| Face to Face | ASME B16.10 |
| End Connections | RF / RTJ / BW |
| Body Material | WCB / CF8M / LCC / WC6 |
| Disc / Arm | SS316 / CF8M / Duplex |
| Seat Ring | SS316 / Stellite 6 HF |
| Design Temp. | -196°C to +593°C |
| Testing | API 598 |
ASTM A216 WCB
Oil, gas, water, and steam service at ambient to moderate elevated temperatures.
ASTM A217 WC6
High-temperature steam and hot oil non-return service in power and refinery plants.
ASTM A351 CF8M
Corrosive chemical process streams, marine, and pharmaceutical non-return applications.
ASTM A890 4A
Offshore seawater and chloride-rich process service requiring maximum corrosion resistance.
Pump and compressor discharge non-return, pipeline isolation in gathering and transmission service.
Boiler feedwater, steam condensate, and cooling water pump discharge protection.
Pump station discharge and sewer force main non-return where flow velocities are moderate.
Corrosive fluid pump discharge in CF8M or duplex body with hard-faced seat for erosive media.
Bilge, ballast, and seawater cooling pump non-return service on commercial and naval vessels.
Our engineers will help you select the right disc type, closure assistance, and material for your system.