The hydraulic solenoid valve is a magnetic core that absorbs and restrains the pressure of the spring to drive the valve core after the solenoid coil is energized; the electric valve is driven by the motor to drive the valve core to actuate, and the electric valve is divided into a shut-off valve and a conditioning valve.
Difference between electric valve and solenoid valve:
The solenoid valve is a magnetic coil that generates magnetic force to absorb the pressure of the spring after the solenoid coil is energized to drive the valve core. The electromagnetic coil has a simple structure and is inexpensive and can only complete the switch. The electric valve is driven by the motor to drive the valve core to drive the valve core. The valve is divided into (shut-off valve) and conditioning valve. The shut-off valve is a two-position operation, that is, fully open and fully closed. The conditioning valve is equipped with an electric valve positioner on the top, and the valve is dynamically stabilized in one position through closed-loop conditioning.
Use of electric valve and solenoid valve:
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 imitating volume adjustment of pipeline medium flow of liquid and gas breeze system. It is AI control. In the control of large valve breeze 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. It is common in pipelines of DN50 and below, and it is rare to go up.
Electric valve: It can have AI response signal and can be controlled by DO or AO. It is similar to that of large pipeline breeze valve.
1. Switching mode:
The solenoid valve is driven by the coil and can only be opened or closed, and the action time when switching is short. The driving of the electric valve is usually driven by a motor, and the opening or closing action requires a certain amount of time to imitate, which can be adjusted.
2. Nature of work:
The solenoid valve has a small general flow coefficient and a small working pressure difference. For example, the common 25-port solenoid valve has a much smaller flow coefficient than the 15-port electric ball valve. The driving of the solenoid valve is through 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. The electric valve is usually driven by a motor, which is more resistant to voltage shock. The solenoid valve is quick-opening and quick-closing. It is generally used for small flow and pressure, and the central electric valve that requires a large switching frequency is the opposite. The opening degree of the electric valve can be controlled, and the states are open, closed, half-open and half-closed. It can control the flow of medium in the pipeline and the solenoid valve cannot meet this request. The solenoid valve can be reset when the power is off. The electric valve needs to be reset and installed in such a function.
3. Applicable technology:
The solenoid valve is suitable for some special process requirements, such as leakage, special fluid media, etc., and the price is more expensive. Electric valves are generally used for conditioning, and there are also switching values, for example: solenoid valves on non-burning brick machines.