Series 451bH

Our D/G/H safety valves, equipped with a stainless steel bellows and a metal-supported elastomer seal, offer special approval for the effective protection of heating systems in industrial and building technology. They are also ideal for protecting non-intrinsically safe solar systems by meeting the highest safety standards and thus minimizing the risk of malfunctions. These valves meet the strict requirements of the Swiss SWKI and stand for quality and reliability.

Thanks to their precise design, these safety valves are able to ensure operational safety in demanding environments. Their specific suitability for heating systems as well as for solar systems underlines the versatility and technical superiority of this valve series. Compliance with the SWKI guidelines also confirms the high quality and safety of our products for use in Switzerland and beyond.

• 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.