Select the solenoid valve
according to the pipeline parameters: diameter specification (ie DN), interface method
Determine the diameter (DN) size according to the internal diameter of the pipeline or flow requirements;
Interface mode, generally > DN50 to choose flange interface, ≤ DN50 can be freely selected according to user needs.
The select solenoid valve
according to fluid parameters: material, temperature group
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;
High-temperature fluid: choose a solenoid valve made of high-temperature resistant electrical materials and sealing materials, and choose a piston-type structure;
Fluid state: as large as gas, liquid, or mixed state, especially when the diameter is larger than DN25, it must be distinguished;
Fluid viscosity: usually below 50cSt can be arbitrarily selected, if it exceeds this value, a high viscosity solenoid valve should be used.
Selection of solenoid valves
according to pressure parameters: principles and structural varieties
Nominal pressure: This parameter has the same meaning as other general valves, and is determined according to the nominal pressure of the pipeline;
Working pressure: If the working pressure is low, the direct-acting or step-by-step direct-acting principle must be used; when the minimum working pressure difference is above 0.04Mpa, direct-acting, step-by-step direct-acting, and pilot-operating can be selected.
Electrical selection: It is more convenient to choose AC220V and DC24 for voltage specifications as far as possible.
Choose according to the duration of continuous operation: normally closed, normally open, or continuously energized
When the solenoid valve
needs to be opened for a long time, and the duration is longer than the closed time, the normally open type should be selected;
If the opening time is short or the opening and closing time is not long, the normally closed type is selected;
However, for some working conditions 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.
Select auxiliary functions according to environmental requirements: explosion-proof, non-return, manual, waterproof fog, water shower, diving.
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