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Two-way two-position solenoid valve in the selection of matters needing attention

Two-position two-position solenoid valve in the selection of matters needing attention:
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.
Two-way two-position solenoid valve allows the liquid viscosity to be generally below 20 CST (Celsius), more than 20 CST (Celsium) should be specified.

1bar=105Pa≈1.02kgf/cm2

1MPa=106Pa

1psi=6.895kPa=0.06895bar European and American countries are accustomed to using psi as a unit

1Psi=lb/in2

Working pressure difference, the maximum pressure difference in the pipeline should be less than 0.04MPa direct-acting and step-by-step direct-acting; the lowest working pressure difference is greater than 0.04MPa can be used when the pilot type (differential pressure) solenoid valve; the highest working pressure difference Should be less than the maximum calibration pressure solenoid valve; general solenoid valve is one-way work, so pay attention to whether there is back pressure difference, if installed check valve. When the fluid cleanliness is not high, the filter should be installed in front of the solenoid valve. Generally, the electromagnetic valve requires better cleanliness of the medium. Pay attention to the flow aperture and the nozzle diameter; solenoid valve is generally only two-way control switch; conditions allow to install the bypass pipe, easy to repair; have water hammer phenomenon to customize the solenoid valve opening and closing time adjustment.
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. (VA: apparent power S, W: active power P, Var: reactive power Q)
Second, reliability
Solenoid valve is divided into two types: normally closed and normally open: Generally, normally closed type is used, power on, and power off. However, normally open type should be selected when the open time is very long and closed.
Life test, the factory is generally a type test project.
When the operation time is very short, the direct-acting type is usually selected when the frequency is high.
Third, security
General solenoid valve is not waterproof, please use waterproof type when conditions are not allowed.
The highest nominal pressure of two-way two-position 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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