SAFETY EXCESS PRESSURE VALVE
Type 44-8 Safety Excess Pressure Valve (SEV) for protecting district heating plants. The Type 44-7 Excess Pressure Valve consists of a valve and an actuator with operating diaphragm. In contrast, the Type 44-8 Safety Excess Pressure Valve is designed with an actuator with two diaphragms. The version with two independent operating diaphragm complies with AGFW (German District Heating Association) regulations concerning components in-house substations according to DIN 4747-1. This regulator version continues to operate even after the operating diaphragm ruptures. In the event of a ruptured operating diaphragm in the actuator, the regulator continues to operate. An indicator at the actuator shows that the actuator is damaged.