The working principle of the intake valve of a screw air compressor is that the intake valve is electrically loaded and closed. The current during device unloading may slightly increase, and the current during unloading at 22KW may be 31A. At first, it seemed that the intake valve was not closed. This is because if no gas is used, the pressure will slowly rise after the machine is unloaded, and the high pressure alarm may stop! In addition, even after the machine stops, there is still residual pressure in the machine that cannot be discharged (about 6 kg), causing the engine to overload during restart< Br/>


When the intake valve of the screw air compressor is a normally open intake valve, the solenoid valve opens when the screw air compressor is not loaded, and closes after the compressor is loaded. Opening the solenoid valve provides a method of closing the intake valve, but it cannot be completely closed and reserves intake space to maintain the minimum pressure required for lubricating the compressor. This pressure is usually 1.5 bar. The solenoid valve is closed. Then the compressor enters normal operation until the set working pressure, depending on the user.

The intake valve has two pipes, one of which is ventilated; One is to ensure normal load on the compressor by releasing residual gas from the valve. When unloading, the fuel tank pressure is high, indicating that the intake valve has a large opening and the current is too high. Adjust the exhaust screw to ensure that the fuel tank pressure is not too high. After the screw air compressor is turned off, the tank pressure will be completely drained within approximately 60 seconds. That is to say, the pressure is 0 and the tank pressure is 6 bar. This indicates a problem with the intake valve exhaust pipeline. Too fine; The combination valve hole is too small or blocked< Br/>


After unloading, the pressure increases slightly back and forth, but this is only a balance and requires a very short time. It will not rise to the high pressure for shutdown. The high pressure shutdown should be the problem of the air compressor solenoid valve. Check whether it is normal and functional. Regardless of the intake valve, the fuel tank pressure must be maintained between 1.0 and 2.0 during unloading between BARs. If it is too high, it will waste a lot of energy for the screw air compressor< Br/>


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