The cause and solution of the blockage of the solenoid valve

Plugging is the most common fault of the solenoid valve. There are many reasons for the blockage of the solenoid valve, for example, the fluid has impurities, the type of the solenoid valve is not chosen correctly, or the working environment of the solenoid valve becomes more complicated. Under normal conditions, there are five ways to solve the problem of solenoid valve blockage: cleaning method, external scour method, installation pipe filter method, increasing throttle gap method, medium scour method and so on.
1. Cleaning method
The impurities such as slag, rust, residue and other impurities are usually caused by the blockage of the solenoid valve. Too much sundries lead to the damage of the valve core and the seal face, or the scratch and injury of the parts. The cleaning method is to dismantle the solenoid valve and clean the pipelines and solenoid valves. After the cleaning is finished retest and work normally
Solenoid valve
Two. External scour method
The external scouring method refers to the scouring of gas and steam outside the bottom of the valve cover. When the valve is blocked or jammed, the external gas or steam valve is opened, and the washing operation can be completed under the condition of the stationary electromagnetic valve, so that the valve can run normally.

Three. Installation of pipe filter method

For small caliber solenoid valves, especially ultra small flow control valves, the throttling gap is very small, and there is not a little residue in the medium. In case of blockage, a filter can be installed on the valve front pipe through the solenoid valve manufacturer to ensure the smooth passage of the medium. With the positioner used in the regulating valve, the locator is not working properly, and the choke of the gas path choke is the most common fault. Therefore, when the positioner is working, the gas source must be handled well. The usual method is to install air filter pressure reducing valve on the gas source pipeline before the positioner.

Four. Enlargement of the throttling method
If the solid particles in the medium or the welding slag and rust that are washed out in the pipe and so on, the throttle of the throttle can be replaced by the throttle of the throttle. The throttle area of the throttle is a window, the opening type of the valve core and the sleeve. The fault can easily be broken down because the area of the throttle is concentrated instead of the circular distribution. Exclude。 If it is a single or double seat valve, the plunger spool can be changed to "V" shaped spool, or to sleeve valve. For example, a chemical plant has a two seat valve often stuck, recommended to replace the sleeve valve, the problem will be solved immediately.
Blockage treatment of solenoid valve
Five, medium scour method
Using the scouring energy of the medium itself, it can scour and carry away easily precipitated and easily clogged things, thereby improving the anti blocking function of the valve. The common methods are:
1, change to flow closed type use
2. Streamline valve body
3, the throttle put the most serious erosion, using this method should pay attention to improve the erosion resistance of cutting pieces of material.