We are supplying here the high quality Screw Air Compressor is a compressor that uses a rotary-type positive displacement mechanism, called a rotary screw, air-end. They are commonly used to replace piston compressors, in commercial and industrial applications, where large volumes of high pressure air are needed. The compressor will turn on and build up pressure to whatever your set point or facility demand. Then the compressor will turn itself off and wait. The Screw Air Compressor is very efficient and durable.