How does a screw compressor work?

A screw compressor can run loaded ('pumping air') or unloaded ('idle'). The inlet/loading valve opens and closes according to air demand. The inlet valve is controlled by a solenoid valve that supplies control air to the inlet/loading valve. Check solenoid valve coil and solenoid valve operation.

How do you adjust an air compressor?

When the pilot seat of the differential screw is in contact with the ball, secure the locknut. Adjust the air compressor by setting the load pressure to a minimum and then turning it off. Slowly screw the pressure screw back into its place until you feel the air coming out the top of the valve.

How do you control a compressor at part load?

A moderately efficient method of controlling a compressor at part load uses load/unload mode with adequately sized storage receiver capacity. With this mode, a pressure switch, or electronic control, is used to provide load and unload signals to the compressor.

How do you load a compressor?

Load/unload — Loading and unloading a compressor using inlet valve control and sump blowdown. Moderately efficient if the compressor has access to large storage. Variable displacement — Opening up ports in the screw to bypass the compression element. Good efficiency if set up correctly.

What should I do if my air compressor is too low?

If the capacity of the air compressor is really too low, check the following: Check differential pressure over oil separator. Replace separator when necessary. Check and replace compressed air filters (if installed). Compressor does not unload. Check if pressure switch is correctly set and working.

How do you tighten an air compressor?

Place the valve ball into the pilot valve hole in the air compressor body and hand tightens the pilot cap assembly into the pilot hole body. Tighten the differential locknut. Turn the unloader screw assembly into the pilot cap assembly suitably to set the cut-out pressure. Tighten the pressure screw lock nut.