What should be paid attention to when selecting a solenoid valve

Solenoid valve is controlled by electromagnetic effect, and the main control method is controlled by relay. In this way, the solenoid valve can cooperate with different circuits to achieve the expected control, and the control accuracy and flexibility can be guaranteed.

1.applicability

The fluid in the pipeline must be consistent with the medium calibrated in the selected solenoid valve series model.

The temperature of the fluid must be lower than the calibration temperature of the selected solenoid valve.

The allowable liquid viscosity of the solenoid valve is generally below 20CST, if it is greater than 20CST, it should be indicated.

Working pressure difference, when the high pressure difference of the pipeline is less than 0.04MPa, direct-acting and step-by-step direct-acting types such as ZS, 2W, ZQDF, ZCM series should be selected; when the low working pressure difference is greater than 0.04MPa, the pilot type (pressure difference type) solenoid valve; the maximum working pressure difference should be less than the maximum calibration pressure of the solenoid valve; general solenoid valves work in one direction, so pay attention to whether there is a reverse pressure difference, and install a check valve if there is one.

When the cleanliness of the fluid is not high, a filter should be installed in front of the solenoid valve. Generally, the solenoid valve requires better cleanliness of the medium.

Pay attention to the diameter of the flow hole and the diameter of the connecting pipe; the solenoid valve is generally only controlled by two switches; if conditions permit, please install a bypass pipe for easy maintenance; when there is water hammer, the opening and closing time adjustment of the solenoid valve should be customized.

Pay attention to the influence of ambient temperature on the solenoid valve

The power supply current and power consumption should be selected according to the output capacity. The power supply voltage of the gas solenoid valve is generally allowed to be about ±10%. It must be noted that the VA value is relatively high during AC startup.