‍ball check valves/wafer check valves/flanged check valve

Standard:
1. Design standard: EN 12334
2. Face to face: EN 558-1
3. Flange end: EN 1092-2
4. Pressure test: EN 12266-1

Feature: No noise, fully enclosed, straight-through, anti-"water hammer", the smaller of losing pressure

Uses: water, seawater and so on

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