Comparison of use of electric valve and solenoid valve

- Mar 28, 2020-

Solenoid valve: used for on-off control of liquid and gas pipelines, it is two-position DO control. Generally used for the control of small pipelines.

Electric valve: It is used for analog quantity adjustment of pipeline 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 switching value, it is DO control, and it can only be used for small pipeline control.

Electric valve: It can have AI feedback signal and can be controlled by DO or AO. It is found in large pipes and dampers.

1. Switch form:

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

The drive of electric valve is generally driven by a motor. It takes a certain amount of time to complete the opening or closing action and can be adjusted.

2. Nature of work:

The solenoid valve generally has a small flow coefficient and a small working pressure difference. For example, the flow coefficient of a 25-port solenoid valve is much smaller than a 15-port electric ball valve. The solenoid valve is driven by the electromagnetic coil, which is relatively easy to be damaged by voltage shock. Equivalent to the role of a switch, that is, on and off.

Electric valve is generally driven by a motor, which is more resistant to voltage shock. Solenoid valves are quick-opening and quick-closing. They are generally used in small flows and pressures, where electric switching is required where the switching frequency is high. The opening degree of the electric valve can be controlled, and the states are open, closed, half-open and half-closed. The flow rate of the medium in the pipeline can be controlled, but the solenoid valve cannot meet this requirement.

The solenoid valve can be reset when the power is off. The electric valve needs a reset device for this function.

3. Applicable technology:

The solenoid valve is suitable for some special process requirements, such as leakage, special fluid medium, etc., and the price is more expensive.

The electric valve is generally used for adjustment, and there are also switching values, such as the end of the fan coil.