What is the difference between electric valve and solenoid valve?

The solenoid valve is a solenoid coil that generates a magnetic attraction to overcome the pressure of the spring to drive the spool to move after the solenoid is energized. It is a solenoid with simple structure and low price, which can only be switched;


The electric valve drives the valve stem through a motor to drive the spool to move. The electric valve is divided into (shut-off valve) and regulating valve. The shut-off valve is a two-state work that is fully open and fully closed. The regulating valve is equipped with an electric valve positioner, and the valve is dynamically stabilized in a position through closed-loop adjustment.


1. Switch form:


The solenoid valve is driven by a coil and can only be opened or closed, and the action time is short when switching.


The driving of the electric valve is generally by a motor, and it takes a certain amount of time to complete the opening or closing action, which can be adjusted.


2. Nature of work:


The total current coefficient of the solenoid valve is very small, and the working pressure difference is very small. Under normal circumstances, the 25-caliber solenoid valve has a much smaller flow coefficient than the 15-caliber electric ball valve. The solenoid valve is driven by the solenoid coil, which is more easily damaged by voltage shock. It is equivalent to the function of a switch, which is two functions of on and off.


Solenoid valves are fast-opening and fast-closing. They are generally used in places with small flow and low pressure, and electric valves are the opposite of where high switching frequency is required. The drive of the electric valve is a motor, which is relatively resistant to voltage shock. Control, the state is open, closed, half open and half closed, which can control the flow of the medium in the pipeline, but the solenoid valve cannot meet this requirement.


Solenoid valves can generally be reset when power is off. For such functions, electric valves need a reset device.


3. Applicable process:


Solenoid valve is suitable for some special process requirements, leakage, special fluid medium, etc., and the price is more expensive.


Electric valves are generally used for adjustment, and there are also switching values, such as: the end of the fan coil.