HERZ-Design-Thermostat Head for MMA Valves

with liquid sensor (hydrosensor), set point range 8–30 °C, frost protection adjustable at approx. 8°C. Limitation and locking of the set point range via limiting pins 1 9551 02 possible (must be ordered separately). As of year of manufacture 1988, connection diameter M 28 x 1.5 mm.