
One-way (non-return) valve for 15 mm (1/2") lines — flow pushes it open, reverse flow shuts it automatically; no handle. Spring-loaded disc design, for upward-flowing vertical lines only (e.g. above a pump). Bronze construction, Screwed BSP (IS 554) ends. Tested to 25 kg/cm² shell / 16 kg/cm²; up to 80°C. For water, oil. Single-piece body; nitrile O-ring seal; also available metal-to-metal.
| Orientation | Vertical only |
| Mechanism | Spring-loaded disc |
| Ends / flange std | Screwed BSP (IS 554) |
| Shell test | 25 kg/cm² |
| Seat test | 16 kg/cm² |
| Max temp | 80°C |
| Fluids | Water, Oil |
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