Choosing a suitable solenoid valve needs to meet many requirements. Because in different environments, different temperatures and even different humidity conditions, the solenoid valves that need to be selected are also different.

So when choosing a solenoid valve, you need to know the working medium. Generally, solenoid valves are used in media such as water, oil, petroleum products, steam, compressed air or heat transfer fluids without solid particles. The circulating medium can help you determine the material you need to use. Most solenoid valves are made of brass (suitable for water, fuel, gas or inert gas), stainless steel (corrosive liquid, gas or food liquid), and plastic (mainly used in chemical and food departments). Of course, in order to increase the life of the solenoid valve and prevent solid particles, impurities, etc. from entering the valve, it is best to install a filter upstream of the solenoid valve.

The solenoid valve is 2-way, but it can also have multiple ports. It is usually represented by 2 numbers, one for the number of channels and the other for the number of positions. For example, a 3/2 solenoid valve represents 3-way 2-position.

Depending on the use time of the solenoid valve, you can choose a normally closed solenoid valve or a normally open solenoid valve.

Normally closed solenoid valve opens when powered on and closes when powered off

Normal open solenoid valve closes when powered on and opens when powered off

Depending on the flow and power consumption requirements of the usage scenario, there are direct-acting solenoid valves and pilot-operated solenoid valves to choose from.

When the direct-acting solenoid valve is powered on, the coil acts directly on the diaphragm or valve. The valve is opened directly, so the power used will be relatively large. It is generally used for low flow, and the pressure range ranges from 0 bar to the maximum bearing capacity of the circuit.

The pilot-operated solenoid valve uses the pressure difference between the upstream and downstream to open and close the valve. When powered on, the coil sends an open or closed signal, so the power required is relatively small. This type of solenoid valve needs to be used in high flow conditions to achieve a pressure difference between the inlet and outlet that is sufficient to open the solenoid valve.

Under normal circumstances, solenoid valves are sensitive to humid environments. Therefore, when choosing, the waterproof level of the coil should be judged according to the humidity of the environment. IP65 can ensure that the product can withstand water washing outdoors without affecting its use. IP67 can ensure that the product can be immersed in 1 meter deep water for 30 minutes and can still be used after being out of water. IP68 is the highest waterproof level. The product can be submerged indefinitely under the specified water pressure to ensure that it will not be damaged by water immersion and can still work normally after being out of water.

Including when the ambient temperature is relatively high and there is a risk of explosion, it is necessary to select a solenoid valve with a suitable explosion-proof level to ensure the safety of the product during application.

Under these conditions, the required solenoid valve can basically be selected. If there are more conditions for the solenoid valve, you can directly contact the manufacturer for communication.