651mHNK Safety valves with diaphragm made of gunmetal
Rugged safety valve with diaphragm and a full metal construction. Designed to protect hot water and heating systems.
Due to this unparalleled design, which contains no plastic parts, these valves are also suitable for very high outside temperatures.
For the protection of:
- Thermostatically protected closed water heating systems with supply temperatures up to 120 °C and an allowed heating capacity of up to 2,700 kW according to TRD 721, DIN 4751, and DIN EN 12828.
If the thermostatic limiting and control unit fails, the safety valve must release the total heating capacity of the boiler in the form of hot water and steam. Thanks to the fully metal design, these safety valves can also be installed in high ambient or radiation temperatures.
