The OGX2071 series on-off electric valve consist of a valve actuator and a brass valve.This product can be used to control the opening and closing of cold and hot water air conditioning system pipes,in order to achieve the purpose of controlling the room temperature.The actuator is driven by a one-way hysteresis synchronous motor and the valve is closed when not operating.When the product needs to work, the temperature controller provides an opening signal, so that the electric valve is connected to the AC power supply to open the valve, frozen water or hot water into the fan coil, to provide cold air or heating for the room.When the room temperature reaches the set value of the temperature controller, the temperature controller will power off the electric valve, and the reset spring closes the valve, so as to cut off the water flow into the fan coil.The valve is closed or opened to keep the room within the temperature range set by the thermostat at all times.