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The knowledge about screw compressor intake valves is here

From： Hunan ZEGA Date：2018-11-06 13:58:32 Hits：796 Belong to：Company News

The air compressor intake valve can also be said to be an intake control combination valve, which has the functions of intake control, loading and unloading control, capacity regulation control, discharge, preventing unloading or shutdown is oil injection and so on. Today, let's understand the working principle of the intake valve of screw air compressor.

　　The working principle of the intake valve of the screw air compressor < br/>
　　A general rule for the intake valve of screw air compressor is: the intake valve is loaded with electricity, and the power is lost and unloaded.

　　Sometimes our equipment has a slightly large current in the case of unloading, and the current is 31A when unloading 22KW. It is initially suspected that the intake valve is not closed tightly, because when there is no gas, after the machine is unloaded, the pressure will slowly rise, and sometimes the high pressure alarm stops! And after the shutdown, there is still some residual pressure inside the machine that cannot be unloaded (around 6 kg), resulting in overload of the main engine when starting again.

　　When the screw air compressor intake valve belongs to the normally open intake valve, the solenoid valve is open when the screw air compressor is not loaded, and the solenoid valve is closed after the compressor is loaded. When the solenoid valve is opened, there will be a gas all the way to close the intake valve, but can not be completely closed, but also to retain the intake space to maintain the pressure required for compressor lubrication, this pressure is generally 1.5bar; after the solenoid valve is closed, the compressor will enter the normal working state until the set working pressure, depending on the user.

　　The intake valve has two pipes, one way empty; Drain the residual gas in the valve all the way to ensure the normal loading of the compressor. When unloading, the current is too large, indicating that the tank pressure is high, the opening of the intake valve is large, please adjust the venting screw to ensure that the tank pressure is not too high.

　　After the screw air compressor is stopped, the tank pressure can generally be completely emptied in about 60 seconds, that is, the pressure is 0, and your tank pressure is still 6bar, indicating that there is a problem with the intake valve venting pipeline:

　　It may be that the pipe diameter is too thin;

　　The combination valve orifice is too small or whether it is blocked by debris.

　　After unloading, the pressure will rise back and forth slightly, but this is only needed for balance, and it is short. It will not rise to high-pressure shutdown, high-pressure shutdown should be that there is a problem with the solenoid valve of the air compressor, please check whether it is intact and whether it can work normally. No matter what kind of intake valve, the tank pressure should be maintained between 1.0~2.0BAR when unloading. Too high is a big waste of energy for screw air compressors.

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