What is the difference between electric valve and solenoid valve?

Solenoid valve: used for on-off control of liquid and gas pipelines, two-position DO control. Generally used for the control of small pipelines.
Electric valve: It is used to adjust the analog quantity of the pipe medium flow of liquid, gas and wind system. It is AI control. In the control of large valves and wind systems, electric valves can also be used for two-position switch control
Solenoid valve: It can only be used as a switch value. It is DO control. It can only be used for small pipeline control. It is common in pipelines of DN50 and below.
Electric valve: It can have AI feedback signal and can be controlled by DO or AO. It is more common in large pipelines and air valves.

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:
Solenoid valves generally have a small flow coefficient and a very small working pressure difference. For example, the general 25-diameter solenoid valve has a much smaller flow coefficient than the 15-diameter electric ball valve. The solenoid valve is driven by the solenoid coil, which is relatively easy to be damaged by voltage shock. It is equivalent to the function of a switch, which has two functions: on and off.
Electric valves are generally driven by motors, which are more resistant to voltage shocks. Solenoid valves are quick-opening and quick-closing. They are generally used in places where small flow and small pressure are required, and the electric valve is reversed where high switching frequency is required. The opening degree of the electric valve valve can be controlled, and 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, such as 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 a fan coil.