Six selection methods and essentials for solenoid valves in the current market1、 Select the solenoid valve based on pipeline parameters: diameter specification (i.e. DN), interface method
1. Determine the diameter (DN) size according to the on-site pipeline inner diameter size or flow requirements.
2. Interface method, generally>DN50 requires flange interface, ≤ DN50 can be freely selected according to user needs.
1. Corrosive fluids: corrosion-resistant solenoid valves and all stainless steel should be selected; Edible ultra clean fluid: It is recommended to use food grade stainless steel solenoid valves.
2. High temperature fluid: It is necessary to choose electromagnetic valves made of high-temperature resistant electrical materials and sealing materials, and to choose piston type structures.
3. Fluid state: up to gaseous, liquid, or mixed state, especially with a diameter greater than DN25.
4. Fluid viscosity: Usually below 50cSt, it can be freely selected. If it exceeds this value, a high viscosity solenoid valve should be used.
3、 Selecting solenoid valves based on pressure parameters: principles and structural types
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. Work pressure: If the work 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 acting, step-by-step direct acting, and pilot operated can all be selected.
4、 Electrical selection: The voltage specifications should preferably be AC220V or DC24, which are more convenient.
5、 Choose based on the duration of continuous work: normally closed, normally open, or continuously powered on
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, choose 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 long-term electrified type should be selected.
6、 Select auxiliary functions according to environmental requirements: explosion-proof, check, manual, waterproof fog, water shower, diving
1. Explosive environment: Electromagnetic valves with corresponding explosion-proof levels must be selected.
2. When there is backflow in the fluid inside the pipe, a solenoid valve with check function can be selected.
3. When on-site manual operation of the solenoid valve is required, a solenoid valve with manual function can be selected.
4. Waterproof and dustproof varieties (with a protection level of IP54 or above) should be selected for outdoor installation or in dusty environments.
5. Submersible solenoid valves (with a protection level of IP68 or above) must be used for fountains.