Spring-loaded differential pressure control valve
The Fig 753 PRESO overflow valve from Ari Armaturen is a spring-loaded, straight-through differential pressure control valve with flanges in accordance with DIN EN 1092-1/-2. It opens when the differential pressure increases and reliably protects systems against overload. The compact design and maintenance-free construction make it ideal for use in pump protection and bypass lines.
| Feature | Specification |
| Nominal size | DN 15 – DN 100 |
| Nominal pressure | PN16 |
| Body | Cast iron EN-JL1040, ductile iron EN-JS1049, cast steel GP240GH+N, stainless steel GX5CrNiMo19-11-2 |
| Temperature range | -10 °C to +400 °C (optionally down to -60 °C) |
| Face-to-face length | according to DIN EN 558-1 R1 |
| Leakage rate | Class IV according to DIN EN 1349 |
| Kvs values | 2 – 45 m³/h |
| Setpoints Control ranges | A: 0.5 – 1.5 bar B: 1.0 – 3.0 bar C: 2.0 – 5.0 bar D: 4.0 – 10 bar |
It opens when the differential pressure rises and regulates the flow rate proportionally.
Liquids, gases and steam (observe material resistance).
Standard: -10 °C to +400 °C, optionally down to -60 °C.
Yes, test no. 922-9241371.
Yes, e.g. heating jacket, PTFE cone, manual control unit.
Our insulations are more than just accessories – they perfectly complement fittings and systems and increase efficiency, safety and adaptability.
Order and configure now.
We offer:
