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The detailed difference between electric valve and solenoid valve and the different uses of the two valves


1. The solenoid valve uses the electromagnetic principle, and uses the electromagnetic attraction generated by the electrified solenoid coil to guide the movement of the valve core. The control mode is DO digital signal control. The solenoid valve has a single structure, simple principle and low price, and can only switch the valve. control, suitable for use in pipes with smaller diameters.
The solenoid valve is normally installed in small-diameter pipelines, and is suitable for use in small-diameter pipelines that require rapid and frequent valve opening and closing. The designed flow is small and the pressure of the valve is also low. The solenoid valve uses the suction force of the solenoid coil to drive the valve to open and close, which is simple and effective. At the same time, the solenoid valve coil will be affected by the voltage change, which is relatively easy to damage and has a short working time. The solenoid valve is similar to the gate valve, it only has two functions of opening and closing the valve, and cannot adjust the flow of the pipeline medium.
2. Electric valves can be used in larger diameter pipelines, and there is a larger scope of application. The electric valve is suitable for a two-way motor as the driving part of the valve. The valve is opened and closed through the rotation of the motor. The degree of opening and closing can be adjusted, and the valve can be half-open and half-closed to control the flow of the medium.
The driving device of the electric valve is a reversible electric motor, which drives the spool to control the valve through the rotation of the motor for a certain period of time. Using AI analog signal control, the flow of the pipeline medium can be adjusted, and digital can also be used in a specific pipeline environment. signal control.
3. Scope of application of electric valve and solenoid valve:
The solenoid valve has excellent anti-leakage performance, opens and closes quickly, and has low power. It is suitable for use as a cut-off in some chemical pipelines such as corrosion and toxicity. Electric valves are mostly used for the regulation of pipeline flow. They are normally installed at the outlet of air supply and refrigeration pipelines. They can also be used in liquid pipelines. They are widely used in canned pipelines and sewage treatment pipelines for beverage production.
Expansion information -
Solenoid valve (Electromagnetic valve) is an industrial equipment controlled by electromagnetic, and it is an automatic basic component used to control fluid. It belongs to the actuator and is not limited to hydraulic and pneumatic. Used in industrial control systems to adjust the direction, flow, speed and other parameters of the medium. The solenoid valve can be matched with different circuits to achieve the desired control, and the control accuracy and flexibility can be guaranteed. There are many kinds of solenoid valves. Different solenoid valves play a role in different positions of the control system. The most commonly used ones are check valves, safety valves, directional control valves, speed control valves, etc.
The working principle of the solenoid valve: the solenoid valve has a closed cavity with through holes at different positions, each hole is connected to a different oil pipe, the middle of the cavity is a piston, and the two sides are two electromagnets. Which side will it be attracted to, open or close different oil discharge holes by controlling the movement of the valve body, and the oil inlet hole is normally open, the hydraulic oil will enter different oil discharge pipes, and then push the oil cylinder through the pressure of the oil The piston drives the piston rod, which drives the mechanical device. In this way, the mechanical movement is controlled by controlling the current on and off of the electromagnet.
Electric valve, English name: motor-driven valve or electric valve. The electric valve simply uses the electric actuator to control the valve, so as to realize the opening and closing of the valve. It can be divided into upper and lower parts, the upper part is the electric actuator, and the lower part is the valve. Also called air conditioning valve.
The electric valve is a high-end product in the automatic control valve. It can not only realize the switching function, but also realize the valve position adjustment function. The stroke of the electric actuator can be divided into two types: 90° angular stroke and straight stroke. Special requirements can also meet the full stroke of 180°, 270° and 360°. The angular stroke electric actuator is used in conjunction with the angular stroke valve to realize the internal rotation of the valve to control the on-off of the pipeline fluid; the straight stroke electric actuator is used with the straight stroke valve to realize the up and down action of the valve plate to control the on-off of the pipeline fluid.
Working principle of electric valve: The electric valve is usually connected by an electric actuator and a valve, and becomes an electric valve after installation and debugging. The electric valve uses electric energy as power to connect the electric actuator to drive the valve to realize the opening and closing and adjustment of the valve. So as to achieve the purpose of switching or adjusting the pipeline medium.

Solenoid valve is a type of electric valve; it uses the magnetic field generated by the electromagnetic coil to pull the valve core, thereby changing the on-off of the valve body.