Electric two-way valve is a general term, and its concept range is relatively large. As long as it is driven by an electric actuator and the valve is two-way, it is called an electric two-way valve, and the proportional regulating valve can also be said to belong to an electric two-way valve. Electric two-way valves are generally divided into two types: switch type and adjustment type. The proportional control valve is adjustable and belongs to a kind of electric two-way valve. Proportional control valve is an electric valve synthesized by proportional and integral calculation during execution. The farther the calculated value is from the set value, the faster the stepping motor moves, which is basically an attenuated sine wave. The electric two-way valve is fully open or fully closed.