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Pay attention to the selection of solenoid valve

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

One: Applicability

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

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

  The liquid viscosity allowed by the solenoid valve is generally below 20CST, and it should be noted if it is greater than 20CST.

Working pressure difference, when the pipeline high pressure difference is less than 0.04MPa, direct-acting type and stepwise direct-acting type such as ZS, 2W, ZQDF, ZCM series should be used; when the low working pressure difference is greater than 0.04MPa, the pilot type (pressure difference Type) Solenoid valve; the high working pressure difference should be less than the large calibrated pressure of the solenoid valve; generally solenoid valves work in one direction, so pay attention to whether there is a back pressure difference, and install a check valve if any.

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

   Pay attention to the flow aperture and port diameter; solenoid valves generally have only two-position control on the switch; if possible, please install a bypass pipe for easy maintenance; when there is water hammer, the opening and closing time of the solenoid valve should be customized.

  Pay attention to the influence of ambient temperature on 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 higher when the AC starts.

   2. Reliability

Solenoid valves are divided into two types: normally closed and normally open; normally, the normally closed type is used, which is open when energized and closed when power is off; but when the open time is long and the closed is short, the normally open type should be selected.

  Life test, factories generally belong to type test items. To be precise, there is no professional standard for solenoid valves in my country, so be careful when choosing solenoid valve manufacturers.

   The action time is very short. When the frequency is higher, the direct action is generally selected, and the fast series is selected for large diameter.

   Three, safety

  The general solenoid valve is not waterproof, please choose the waterproof type when the conditions do not allow, the factory can customize it.

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

  The all-stainless steel type should be used for corrosive liquids, and the plastic king (SLF) solenoid valve should be used for strong corrosive fluids.

   Explosive environment must use corresponding explosion-proof products.

   Fourth, economy

   There are many solenoid valves that can be used in common use, but on the basis of meeting the above three points, economical products with high temperature solenoid valves should be used.


 This article is original by gas solenoid valve, please indicate http://www.sungofluid.com/


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