Solenoid valve selection should first follow the four principles of safety, reliability, applicability, economy, followed by six aspects of the field conditions (namely, pipeline parameters, fluid parameters, pressure parameters, electrical parameters, mode of action, special requirements to choose).
First, according to the pipeline parameters to select solenoid valve: diameter specification (i.e.), interface mode according to the field pipe diameter size or flow requirements to determine the size of diameter 0.Interface mode, general > to choose flange interface,< can be freely selected according to user needs.
Second, according to the fluid parameters of the solenoid valve: material, temperature groupCorrosive fluid: should choose corrosion resistant solenoid valve and all stainless steel; Edible ultra-clean fluid: food grade stainless steel solenoid valve should be selected.High temperature fluid: the solenoid valve made of high temperature resistant electrical materials and sealing materials should be selected, and the type of piston structure should be selected.Liquid state: large to gaseous, liquid or mixed state, especially when the diameter is larger than the order must be distinguished., fluid viscosity: usually in the following can be arbitrarily selected, if more than this value, to choose high viscosity solenoid valve.
Third, according to the pressure parameters to choose the solenoid valve: principle and structure varietiesNominal pressure: this parameter and other general valve meaning is the same, is based on the nominal pressure of the pipelineWorking pressure: if the working pressure is low, it must choose direct motion or step by step direct motion principle; When the minimum working pressure difference is above, direct acting type, step by step direct acting type and pilot type can be selected.
Fourth, electrical selection: voltage specifications should be preferred as far as possible, more convenient.
Fifth, according to the length of continuous working time to choose: normally closed, normally open, or sustainable electricityWhen the solenoid valve needs to open for a long time, and the continuous time is more than the closing time should be used normally open.If the open time is short or open and close time is not much, then choose normally closed type.However, some working conditions for safety protection, such as furnace and kiln flame monitoring, can not choose normally open, should choose long-term electrified type
Sixth, according to the environmental requirements to select auxiliary functions: explosion-proof, check, manual, waterproof fog, water spray, diving explosive environment: the corresponding explosion-proof solenoid valve must be selectedWhen there is a backflow of fluid in the tube, the solenoid valve with check function can be selected.When you need to manually operate the solenoid valve on site, you can choose the solenoid valve with manual function.Open air installation or dust more occasions should choose waterproof, dustproof varieties (protection grade above).