Steam safety valve 451bH series

for hot waterthreadeddiaphragm

For demanding requirements in hot-water and heating-systems, there is also a version available made of high-quality corrosion- and acid-resistant stainless steel. This valve is suitable for all hot- water systems, where protection cannot be achieved by using a standard safety valve with diaphragm with the standard set pressures of 2,5 or 3 bar, for example in the case of all large building complexes. For the protection of: - thermostatically protected closed-circuit water heating systems with flow temperatures of up to 120°C for all static heights or rated output above 350 kW according to TRD 721, DIN 4751 and DIN EN 12828. - Should the thermostatic limiting and control unit fail, the safety valve has to blow-off the total heating output of the boiler as hot water and steam. - Closed-circuit solar heating plants according to DIN 4757-1 and 2 with flow temperatures up to 120°C for all static heights. - district heating sub-stations, district heating building substations and domestic systems suitable for connection to a hot water district heating network according to DIN 4747-1 and AGFW 505. - heating plants for building technology and industrial applications - co-generation plants (CHP) - biogas plants - district heating transfer stations, building sub-stations - solar plants