Electric heating actuator is a commonplace old product in the HVAC industry, and is widely used in the field of floor heating and water circuit connection, air conditioning water circuit connection. Previously, it was more controlled by the room thermostat, and the temperature value was used as the switching amount, which contributed to the realization of indoor constant temperature and energy saving. The traditional manual electric heating actuator can work stably under most conventional working conditions to meet the design and use functions. However, as a normally closed power mechanism, once it encounters extraordinary circumstances, such as a sudden power failure, it will cause the actuator to be closed and cannot be opened. In the long summer, the normally closed actuator for heating is usually closed by power off, which is of course normal, but from the perspective of the manifold, the spring of the branch spool is squeezed to the limit for up to half a year, so when the h
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