1) Corrosive fluid: Corrosion-resistant solenoid valve and all stainless steel should be selected; Super clean fluid for food: Food-grade stainless steel solenoid valve should be selected;
2) High-temperature fluids: select solenoid valves made of high-temperature-resistant electrical materials and sealing materials, and choose piston-type structures;
3) fluid state: gas state, liquid state or mixed state, especially when the diameter is larger than DN25, it must be distinguished;
4) Fluid viscosity: Generally, it can be arbitrarily selected below 50cSt. If it exceeds this value, a high viscosity solenoid valve should be selected.