How do you change oil on a screw air compressor?

In basic terms, the oil change process for a screw air compressor looks something like this: Clean the area near the compressor’s tank and oil filter to avoid contamination. Remove the oil drain plug and empty the old oil into a sufficiently large container.

What is the scavenge line on a rotary screw compressor?

The scavenge line is found on all bigger oil injected rotary screw compressors and plays a crucial part in the removal of oil from the compressed air. Most people know that the oil separator filter is the part that separates the oil from the compressed air. But that is only part of the story. The oil separation process consists of three steps.

How does an oil separator work?

The air/oil mixture enters the vessel at a pretty high velocity, but will lose momentum quickly. To facilitate this 'tornado action' and to protect the oil separator from direct contact with the incoming air/oil mixture, there is an oil screen or splash screen installed. See the green arrows in the picture where the oil screen is located.