Rotary (or screw) compressors are the backbone of the compressed air and gas industry. Two screws rotating within each other move the air continuously into a smaller space. Finally the compressed air is expelled into a receiver or the compressed air line. The motion is smooth and in one direction. This reduces wear on the components and assures low maintenance and long product life.

Injecting oil reduces friction between components, absorbs some of the heat generated, and improves the seal between the rotating and stationary parts.

Capacity FAD is the measure of free air delivery.