(1) The diameter (DN) shall be determined according to the on-site pipe inner diameter size or flow requirements.

(2) Interface mode: generally, flange interface shall be selected if it is > DN50, and it can be freely selected if it is ≤ DN50.

Select the of the solenoid valve according to the fluid parameters

Material and temperature group.

(1) Corrosive fluid: corrosion resistant solenoid valve and all stainless steel should be selected; Edible ultra clean fluid: food grade stainless steel solenoid valve should be selected.

(2) High temperature fluid: the solenoid valve made of high temperature resistant electrical materials and sealing materials shall be selected, and the piston structure type shall be selected.

(3) Fluid state: it must be distinguished from gas state, liquid state or mixed state, especially when the diameter is greater than DN25.

(4) Fluid viscosity: generally, it can be arbitrarily selected below 50cst. If it exceeds this value, the high viscosity solenoid valve shall be selected.

Select the of the solenoid valve according to the pressure parameters

Principle and structure variety.

(1) Nominal pressure: this parameter has the same meaning as other general valves and 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 step-by-step direct action must be selected; When the low working pressure difference is above 0.04MPa, direct acting type, step-by-step direct acting type and pilot type can be selected.