A typical rotary screw air Screw Air Compressor china compressor has two interlocking helical rotors contained in a housing. Air will come in through a valve, typically called the 
inlet valve and is taken into the space between your rotors. As the screws turn, they reduce the volume of the air, thus increasing the pressure.
The cardiovascular of an air compressor is the screw element which can be called air-end. The air-end can be the most important part of any screw-type compressor. It’s that portion of the machine where the actual compression occurs. It is the heart of the rotary screw atmosphere compressor.
A Rotary Screw Air Compressor is a compressor that uses a rotary-type positive displacement mechanism, called a rotary screw, air-end. … Rotary Screw Compressors also use two inter-twined helical formed screws, referred to as rotors, to compress the air flow.