The difference between an electric valve and a Solenoid Valve

In our daily life, Solenoid Valves and electric valves are relatively common. Many people do not understand the difference between Solenoid Valve and an electric valve. What is the difference between the two? Let's take a look.

Here is the content list:

• Different uses

• Different nature of work

Different uses

A solenoid valve is a solenoid coil that generates a magnetic force to attract and overcome the pressure of the spring to drive the valve core to move. It is a solenoid coil with a simple structure and low price. The electric valve drives the valve stem through the motor to drive the valve core to move, and the electric valve is divided into (a shut-off valve) and regulating valve. The shut-off valve is a two-position type of work, that is, fully open and fully closed. The control valve is equipped with an electric valve positioner, and the valve is dynamically stabilized in one position by closed-loop adjustment. The electric valve is used for analog regulation of medium flow in liquid, gas, and wind system pipelines, and is controlled by AI. In the control of large valves and air systems, electric valves can also be used as two-position switch control; electric valves can have AI feedback signals and can be controlled by DO or AO, which are more common in large pipes and air valves. A solenoid Valve is used for switch control of liquid and gas pipelines, and it is a two-position DO control. It is generally used for the control of small pipelines; it can only be used as switch value, it is DO control, and can only be used for small pipeline control, which is common in pipelines of DN50 and below. The solenoid valve is driven by a coil and can only be opened or closed, with a short action time when switching. Electric valves are generally driven by electric motors. It takes a certain amount of time to complete the opening or closing action, and it can be adjusted.

Different nature of work

Solenoid valves generally have small flow coefficients and small working pressure differences. For example, the flow coefficient of the general 25-caliber Solenoid Valve is much smaller than that of the 15-caliber electric ball valve. The driving of the Solenoid Valve is through the electromagnetic coil, which is equivalent to the function of the switch, that is, the two functions of opening and closing. Electric valves are generally driven by motors and are relatively resistant to voltage shocks. Solenoid Valve is quick opening and quick closing, generally used in small flow and small pressure, where the switching frequency is required to be large, and vice versa. The opening degree of the electric valve can be controlled, and the state is open, closed, half-open, and half-closed. Solenoid Valves can generally be reset after power failure. Electric valves need a reset device for such a function.

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