Four Principles for Selecting Solenoid Valves

1.Applicability

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

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

Solenoid valves allow liquid viscosity generally below 20CST, greater than 20CST should be noted.

When working pressure difference is less than 0.04 MPa, direct and step-by-step operation such as ZS, W, ZQDF, ZCM series should be selected; when the minimum working pressure difference is greater than 0.04 MPa, pilot type (differential pressure type) solenoid valve can be selected; the maximum working pressure difference should be less than the maximum calibration pressure of solenoid valve; in general, solenoid valves work in one direction, so attention should be paid to whether there is backpressure difference, such as installing check valve.

    When fluid cleanliness is not high, filters should be installed before solenoid valves. Generally, solenoid valves require good cleanliness of media.

    Pay attention to the flow orifice and nozzle caliber; solenoid valves are generally controlled by two switches; if conditions permit, please install bypass pipes for easy maintenance; when there is water hammer, customize the opening and closing time of solenoid valves.

    Pay attention to the influence of ambient temperature on solenoid valves

    The power supply current and consumed power shall be selected according to the output capacity, and the power supply voltage is generally allowed to be about ± 10%. It must be noted that the VA value is high when AC starting.

2.Reliability

    Solenoid valves are divided into two types: normally closed and normally open. Generally, normally closed type is chosen, which is open by electricity and closed by power cut. However, when the opening time is long and the closing time is short, the normally open type is chosen.

    Life test, factories generally belong to type test projects, to be exact, there is no professional standard for solenoid valves in China, so it is prudent to choose solenoid valve manufacturers.

    When the action time is very short and the frequency is high, the direct motion type is usually chosen, and the fast series is chosen for the large caliber.

3.Safety

    Generally, solenoid valves are not waterproof. If conditions do not permit, please choose waterproof type. The factory can customize it.

    The maximum calibration nominal pressure of solenoid valve must exceed the maximum pressure in the pipeline, otherwise the service life will be shortened or other accidents will occur.

    All stainless steel type should be used for corrosive liquid, and SLF solenoid valve should be used for strongly corrosive fluid.

    Explosive environment must choose appropriate explosion-proof products.

4.Economy

    There are many solenoid valves that can be used in general, but on the basis of meeting the above three points, the most economical products should be selected.

    These are the four principles of selecting and purchasing solenoid valves introduced by Smart Solu. The principle of solenoid valves can be divided into three categories: direct-acting, step-by-step direct-acting and pilot-type. From the difference of disc structure and material and principle, it can be divided into six sub-categories: direct diaphragm structure, step-by-step direct diaphragm structure, pilot diaphragm structure, direct piston structure, step-by-step direct piston structure and pilot piston structure. I hope our introduction will be helpful for you to choose solenoid valves.