The pressure reducing valve type 681 is a robust diaphragm valve made of gunmetal with integrated strainers. It is used for pressure regulation in drinking water and process water supplies as well as in industrial applications. The high-quality elastomer diaphragm ensures precise regulation and a long service life.
Ideal for use in domestic water supply systems, industrial and building services engineering, fire extinguishing and sprinkler systems as well as shipbuilding and offshore systems.
| Characteristic | Value |
| Nominal size | DN 15 – DN 50 |
| Connection | BSP thread (female/male), optional NPT |
| Nominal pressure | up to 40 bar |
| Back pressure | 0.5 – 15 bar (depending on version) |
| Temperature range | -20 °C to +120 °C |
| Materials | Body: gunmetal CC499K; Sieve: stainless steel 1.4404 |
| Executions | SP (standard): |
| Gaskets | EPDM: -20 °C to +120 °C (up to 8 bar back pressure) FKM: -10 °C to +120 °C (for non-neutral media) |
For drinking water, process water, neutral liquids and gases.
-20 °C to +120 °C.
0.5-15 bar (depending on version).
Yes, e.g. oil and grease-free production for oxygen, galvanized nickel-plated.
DVGW, WRAS, ACS, CE, EAC, ATEX optional.
Our insulations are more than just accessories – they perfectly complement fittings and systems and increase efficiency, safety and adaptability.
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