Membrane safety valve for closed water heaters according to DIN 4753, 8 bar, up to 75 kW, E 1/2 inch - A 3/4 inch

• Watts membrane safety valve for closed hot water heaters (blow-off pressure: 8 bar)
• Connections: input: 1/2 inch female thread x output: 3/4 inch female thread. Max. Power up to approx. 50 kW
• Material: pressed brass CW617N according to EN 12165-99 // membrane made of heat and age-resistant material // twist cap made of impact-resistant plastic // spring made of NiCr steel
• The blow-off pressure is pre-set by the factory and secured against adjustment by a pressed-in safety washer, which carries the blow-off pressure and the component test mark. The function of the safety valve must be checked once a year by a professional: by ventilating the rotary cap, manual draining causes the valve seat to clean.
• Installation regulations: the membrane safety valve must be installed at a point with minimum temperature, at the highest point or in the flow near the heat generator in accordance with the direction of the arrow. The connection line of the safety valve must be designed so that no accumulation of dirt or residues is possible, must be no more than 1 m long, no narrowing of the cross-section and it is not allowed to install shut-off devices.

Membrane safety valve for closed hot water heaters according to DIN 4753 part 1 and DIN 1988. Blow down pressure: see selection box above. The membrane safety valve belongs to the protection of pressurised systems filled with water or water mixtures. Manufacturer: Watts Max. Power up to approx. 50 kW connections: input: 1/2 inch internal thread x output: 3/4 inch internal thread material: pressed brass CW617N according to EN 12165-99 membrane made of heat and ageing resistant material twist cap made of impact-resistant plastic spring made of NiCr steel. The blow off pressure is pre-set by the factory and by a pressed safety disc that allows the blow off pressure to the blow off pressure. and the component test sign, secured against adjustment. Installation Regulations: The membrane safety valve must be installed at a point with minimum temperature, at the highest point or in the forward near the heat generator, taking into account the direction of the arrow. The connection line of the safety valve must be designed in such a way that no accumulation of dirt or residues is possible, must be no more than 1 m long, have no narrowing of the cross-section and it is not allowed to install shut-off devices. The function of the safety valve must be checked once a year by a professional: by airing the rotating cap, a manual draining is caused to clean the valve seat.