CHK
Check valve
Backflow protection for pressurised circuits
Specifications
The RFF check valve prevents any fluid backflow and protects pumps, compressors and heat exchangers against water hammer. Its spring-and-disc design minimises pressure drop and closing hysteresis, while the three-piece bonnet allows quick inspection of the seat machining.
Key features
- Low cracking pressure (0.5 bar)
- Low pressure drop
- Three-piece removable bonnet
- Replaceable spring seat
- Straight-through or angle body
Available connections
| Connection | Standards | DN min – DN max |
|---|---|---|
| Butt weld, EN pipe | EN 10253-2, EN 10253-4 | DN8 – DN300 (16) |
| Butt weld, ASME Schedule pipe | ASME B16.25, ASME B16.9 | DN15 – DN300 (14) |
| Socket weld | ASME B16.11, ASME B16.9 | DN8 – DN100 (11) |
| Butt weld, stainless steel pipe | EN 10253-4, ASME B16.25 | DN8 – DN300 (16) |
Related products
Technical documents
For authorised customers only — sign in to download our price lists, CAD models and approvals.
Client area