Check valve allows the fluid to pass in one direction only. Check valves are designed to restrict the flow to one direction. If the flow reverses direction, the check valve closes.
Check Valves
| Size | DN50 – DN300 |
| Type | Swing Check |
| Rating | Class 150, Class 300 & Class 600 |
| General design and manufacture | API 6D / BS 1868 |
| Valve face to face dimension | ASME B 16.10 |
| Pressure & Temperature Rating | ASME B 16.34 |
| Flange Standard Conformity | ASME B 16.5 |
| Testing | API 598 |
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