COMFORT Safety Group No. 25 DN20 (3/4) 10 bar Brass

The safety group 25, DN 20, provides optimal protection against overpressure in closed domestic hot water heaters (DHW), in accordance with DIN 1988 and DIN 4753, Part 1. It meets the sound insulation requirements of DIN 4109 (sound insulation in building construction) Class 1 and compactly contains all components required by DIN 1988 for equipping DHW units. The safety valve protects the downstream DHW heater, and the backflow preventer prevents the backflow of heated potable water. Additionally, a pressure reducer is upstream to regulate the required system pressure. The safety group 25.2 consists of a pressure reducer, inlet and outlet shut-off valves, a backflow preventer with a test device, a pressure gauge connection, a diaphragm safety valve, and a discharge funnel. The easily replaceable diaphragm safety valve with a wear-resistant stainless steel seat can be rotated 360 degrees via a screw connection for adaptation to different installation conditions. Screw connections with R ¾. Technical data: Inlet pressure: 10 bar according to DIN EN 1488 Operating pressure: max. 80% of the safety valve's response pressure Operating temperature: max. 30°C inlet temperature Pressure reducer setting range: 1.5 - 6 bar (factory setting 4 bar) Max. nominal volume DHW: 1,000 litres Response pressure: Factory setting: 10 bar Medium: Drinking water Component test no.: TÜV-SV-20-545-DN-W-p Installation position: any Flow rate: DN 15: 1.3 m³/h at ∆p 1.1 bar ABP No.: P-IX 16742/I (DM), PA-IX 1794/I (SG)