Solenoid valve is the electromagnetic coil energized magnetic force to attract to overcome the pressure of the spring to drive the spool action, on a solenoid coil, simple structure, cheap price, can only realize the switch;
Electric valve is driven by a motor stem, drive the spool action, electric valve is divided into (off valve) and regulating valve. Turn-off valve is a two-position work that is fully open and fully closed, regulating valve is installed on the electric valve positioner, through closed-loop regulation to make the valve dynamic stability in a position.
Electric valve and solenoid valve use comparison
Solenoid valve: Used for switching control of liquid and gas pipelines. It is a two-position DO control. Generally used for small pipe control.
Electric valve: For liquid, gas and wind system pipeline medium flow analog volume regulation, AI control. In the control of large valves and wind systems can also use electric valves to do two switch control.
Solenoid valve: can only be used as switching quantity, is DO control, can only be used for small pipe control, common in DN50 and below pipe.
Electric valve: can have AI feedback signal, can be controlled by DO or AO, compared to large pipes and air valves.
1. Switch form:
Solenoid valve is driven by coil, can only be opened or closed, switch action time is short.
The drive of the electric valve is generally driven by the motor. The opening or closing action needs a certain amount of time to complete the simulation. It can be adjusted.
2. Job Nature:
Solenoid valve general flow coefficient is very small, and the working pressure difference is very small. For example, the general flow coefficient of 25 caliber solenoid valve is much smaller than 15 caliber electric ball valve. Solenoid valve is driven by electromagnetic coil, relatively easy to be damaged by voltage impact. Equivalent to the role of the switch, is on and off 2 roles.
The electric valve is generally driven by a motor, more resistant to voltage impact. Solenoid valve is fast opening and fast closing, generally used in small flow and small pressure, switching frequency is required to large place electric valve vice versa. The opening of the electric valve can be controlled, the state is open, closed, half open and half closed, you can control the flow of the pipeline medium and the solenoid valve can not meet this requirement.
Solenoid valve general power can be reset, electric valve to such a function needs to add a reset device.
3. Applicable technology:
Solenoid valve is suitable for some special process requirements, such as leakage, fluid medium, etc., the price is more expensive.
Electric valves are generally used for regulation, but also switch quantity, such as: fan coil end.
