Solenoid Valve
Solenoid valves are industrial equipment controlled by electromagnetism, which are automation basic components used to control fluids. They belong to actuators and are not limited to hydraulic or pneumatic systems. It is used in Industrial control system to adjust the direction, flow, speed and other parameters of medium. The solenoid valve can be combined with different circuits to achieve the expected control, and the accuracy and flexibility of the control can be guaranteed. There are many types of solenoid valves, and different solenoid valves play a role in different positions of the control system. The most commonly used ones are one-way valves, safety valves, directional control valves, speed regulating valves, etc.
Keyword： Solenoid Valve
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Detail
Selection basis:
1. Select the solenoid valve according to the pipeline parameters: diameter specification (i.e. DN) and interface method
1) Determine the diameter (DN) size based on the internal diameter or flow requirements of the on-site pipeline;
2) The interface method is generally to choose a flange interface when it is greater than DN50, and can be freely selected according to user needs when it is less than or equal to DN50.
2. Select the material and temperature group of the solenoid valve based on the fluid parameters
1) Corrosive fluid: It is recommended to use corrosion-resistant solenoid valves and all stainless steel; Edible ultra clean fluid: It is recommended to use food grade stainless steel electromagnetic valves;
2) High temperature fluid: solenoid valves made of high-temperature resistant electrical and sealing materials should be selected, and piston type structures should be selected;
3) Fluid state: It must be distinguished from gaseous, liquid, or mixed states, especially when the diameter is greater than DN25;
4) Fluid viscosity: Usually, it can be selected arbitrarily below 50cSt. If it exceeds this value, a high viscosity solenoid valve should be selected.
3. Principle and structural variety of selecting solenoid valves based on pressure parameters
1) Nominal pressure: This parameter has the same meaning as other general valves and is determined based on the nominal pressure of the pipeline;
2) Working pressure: If the working pressure is low, the principle of direct action or step-by-step direct action must be selected; When the minimum working pressure difference is above 0.04Mpa, direct action, step-by-step direct action, and pilot type can be selected.
4. Electrical selection: The voltage specifications should prioritize AC220V and DC24, which are more convenient.
5. Choose based on the duration of continuous operation: normally closed, normally open, or continuously energized
1) When the solenoid valve needs to be opened for a long time and the duration is longer than the closing time, the normally open type should be selected;
2) If the opening time is short or the opening and closing time is not long, select the normally closed type;
3) However, for some working conditions used for safety protection, such as furnace and kiln flame monitoring, the normally open type cannot be selected, and the type that can be powered on for a long time should be selected.
6. Select auxiliary functions according to environmental requirements: explosion-proof, check, manual, waterproof fog, water immersion, and diving.
Nominal diameter:1/8"(8mm)-4"(100mm)
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