The electric three-way regulating valve has two valve cores and valve seats, and the structure is similar to the double seat valve. However, in the electric three-way control valve, when the flow area between one valve core and the valve seat increases, the flow area between the other valve core and the valve seat decreases. In the double-seat valve, the flow area between the two valve cores and the valve seat increases or decreases at the same time; the air opening and air closing of the electric three-way regulating valve can only be realized by selecting the positive and negative actions of the actuator. The change of air opening and air closing of the double seat valve can be realized by directly reversing the valve body or valve core and valve seat; when the electric three-way regulating valve is used in the control system that requires fluid to be proportioned, because it replaces an air opening control Valve and an air-off control valve, therefore, can reduce costs and reduce installation space; electric three-way control valve is also used in bypass control places, for example, one fluid passes through the heat exchanger for heat exchange, and the other fluid does not exchange heat .
