Wafer Type, Spring-Loaded
Dual Plate Check Valve
Ultra-compact backflow prevention with the lowest pressure drop in its class
Two spring-loaded semi-circular plates close rapidly under reverse flow, preventing water hammer and protecting rotating equipment. The wafer body is the shortest face-to-face design available — installs between standard flanges with minimal pipe modification.
API 594ISO 9001CE PED
Technical Specifications
| Size Range | NPS 2″ – 60″ / DN 50 – 1500 |
| Pressure Rating | Class 150 – 2500 / PN 16 – 420 |
| Temperature Range | -196°C to +600°C |
| Body Material | WCB, CF8M, Duplex, WC6, AL-Bronze, Inconel® |
| Seat Material | PTFE, RPTFE, Metal, Viton® |
| End Connection | Wafer, Lug, Double Flanged |
| Design Standard | API 594, ASME B16.34, EN 13789 |
| Testing Standard | API 598, EN 12266-1 |
Key Features
- Two independently spring-loaded plates for fast, non-slam closure
- Shortest face-to-face length in the check valve family
- Lightweight — 70-80% lighter than equivalent swing check valves
- Torsion spring design — no external protrusions, zero leak paths
- Can be installed in horizontal or vertical (upward flow) orientation
Industry Applications
Compressor discharge protectionPump discharge linesSteam & condensate systemsGas processing plantsOffshore riser protection
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