Normally Open/Normally Close selection Thermal Actuator TPA01  

TPA01 electro-thermal actuator is designed to control the open/close of hot water pipe in the heating system so as to control indoor temperature.

Mount the actuator on the valve for hot water; it can control the open/close of the valve through the electrothermal sensor inside the actuator.

When the power is off, the valve is normally close. When the power is on, the actuator stem moves up side, and the valve spring opens the

valve, the chilled-water or hot water enter into the fan coil or heat exchanger to supply cold or warm air to rooms; when the room temperature reaches the set value, the thermostat in the AC system will provide an closed signal to the actuator, and the actuator spring will make the valve close and stop the water flow entering the fan coil or heat exchanger. Through the open or close of the valve, room temperature will be always kept in the set range

The electro thermal actuator can indicate the valve open and close by the red pole . It is flexible, convenient, reliable performance, durable and energy saving.