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Solenoid valve selection knowledge introduction instructions

One: Applicability
The fluid in the tubing must match that of the media in the selected solenoid valve model.

The temperature of the fluid must be less than the calibrated temperature of the selected solenoid valve.
The
Solenoid valves allow the viscosity of liquids to be generally below 20CST, and should be indicated when more than 20CST.

Working pressure difference, the maximum pressure difference in the pipeline is less than 0.04MPa should be used such as ZS, 2W, ZQDF, ZCM series and other direct-acting and step-by-step direct-acting; minimum operating pressure difference is greater than 0.04MPa can be used when the pilot type (pressure Differential type) Solenoid valve; the maximum working pressure difference should be less than the maximum calibration pressure of the solenoid valve; the general electromagnetic valve is one-way operation, so pay attention to whether there is back pressure difference, if there is a check valve installed.

When the fluid cleanliness is not high, the filter should be installed in front of the solenoid valve. General electromagnetic

Valves require better cleanliness of the media.

Pay attention to the flow aperture and the nozzle diameter; the solenoid valve is generally only controlled by two switches; if required, please install the bypass pipe to facilitate maintenance; when there is a water hammer phenomenon, customize the opening and closing time of the solenoid valve.

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 is generally allowed to be ±10%. It must be noted that the VA value at the time of AC start is high.

Second, reliability

Solenoid valves are classified into two types: normally closed and normally open; Normally selected are normally closed, energized open, and power off; however, normally open type is used when the open time is very long and closed.

Life test, the factory is generally a type test project, to be exact, there is no professional standard for solenoid valves in China, so choose a solenoid valve manufacturer with care.

When the operation time is very short, the direct-acting type is generally selected, and the large-caliber selection is used for the fast series.

Third, security

General solenoid valve is not waterproof, please use waterproof type when conditions do not allow, factory can be customized.

The highest rated pressure of the solenoid valve must exceed the maximum pressure in the pipeline, otherwise the service life will be shortened or other unexpected situations will occur.

Corrosive liquids should be made of all-stainless steel type, and strong corrosive fluids should use plastic king (SLF) solenoid valves.

Explosion-proof products must be selected for explosive environments.

Fourth, economy

There are many solenoid valves that can be used universally, but the most economical product should be chosen based on the above three points.

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