The selection of solenoid valve should first follow the four principles of safety, reliability, applicability, and economy in order, and then according to the six aspects of field working conditions (ie, pipeline parameters, fluid parameters, pressure parameters, electrical parameters, action methods, Special requirements for selection).

    Selection basis:

    1. Select the solenoid valve according to the pipeline parameters: diameter specification (namely DN), interface mode

    1. Determine the diameter (DN) size according to the pipe inner diameter size or flow requirements on site.

    2. Interface mode, generally >DN50 should choose flange interface, ≤DN50 can be freely selected according to user needs.

    2. Choose the solenoid valve according to the fluid parameters: material, temperature group

    1. Corrosive fluid: Corrosion-resistant solenoid valve and all stainless steel should be used; edible ultra-clean fluid: Food-grade stainless steel solenoid valve should be used.

    2. High temperature fluid: choose solenoid valves made of high temperature resistant electrical materials and sealing materials, and choose a piston type structure.

    3. Fluid state: large to gaseous, liquid or mixed state, especially if the diameter is larger than DN25, it must be distinguished when ordering.

    4. Fluid viscosity: usually below 50cSt, it can be arbitrarily selected. If it exceeds this value, a high-viscosity solenoid valve should be used.

    3. Choose solenoid valve according to pressure parameters: principle and structure variety

    1. Nominal pressure: This parameter has the same meaning as other general valves, and it is determined according to the nominal pressure of the pipeline.

    2. Working pressure: If the working pressure is low, the principle of direct action or stepwise direct action must be used; when the minimum working pressure difference is above 0.04Mpa, direct action, stepwise direct action, and pilot type can be selected.

    4. Electrical selection: It is more convenient to choose AC220V and DC24 for voltage specifications.

    5. Choose according to the length of continuous working time: normally closed, normally open, or continuously energized

    1. When the solenoid valve needs to be opened for a long time and the lasting time is excessive, 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 power-on type should be selected.

    6. Select auxiliary functions according to environmental requirements: explosion-proof, non-return, manual, waterproof, mist, water shower, diving

    1. Explosive environment: solenoid valve with corresponding explosion-proof grade must be selected.

    2. When the fluid in the pipe has reverse flow, a solenoid valve with check function can be selected.

    3. When the solenoid valve needs to be operated manually on site, the solenoid valve with manual function can be selected.

    4. Waterproof and dustproof varieties should be selected for outdoor installation or dusty occasions (protection level above IP54).

    5. For fountains, submersible solenoid valves must be used (protection class above IP68).

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