The diaphragm safety valves 2115 are designed to protect pressurized liquid systems from exceeding the permissible pressure. They are mainly used for the safety of closed domestic water heaters. Guidelines for selecting the valve size based on the volume of the tank or the thermal power of the heat exchanger are referenced in the catalog table. The safety valves can be used in pressurized water installations and with other non-sticking liquids with a maximum temperature not exceeding 110°C.