Series 851bH

The 651mWNK diaphragm safety valve with enlarged outlet (TÜV/CE) is our premium solution for the highest demands in the drinking water sector. In our efforts to ensure absolute safety and purity in the drinking water system, we consistently use materials of the highest quality. These are specially recommended, tested and certified for contact with drinking water so that no compromises are made in terms of safety and durability.

Developed for use in the cold water supply of feed water heaters, these diaphragm safety valves effectively protect the water heater from potential overpressure. Their special design with enlarged outlet ensures optimum pressure relief and promotes the performance and safety of the entire drinking water system.

• Internal pipe thread
• Male thread

• Combined heat and power plants
• biogas plants
• District heating transfer stations/ house stations
• Solar systems

• closed, thermostatically protected water heating systems

In the event of failure of the thermostatic control and limiting devices, the safety valve must blow off the entire heating output of the boiler in the form of hot water and steam. the entire heating output of the boiler in the form of hot water and steam.

• Closed solar heating systems according to DIN 4757-1 and 2 with flow temperatures up to 120°C for all static heights.
• District heating substations, house substations and house systems for connection to heating water district heating networks to DIN 4747-1 and AGFW 505. 

Safety valves are permanently set and sealed at the factory.