A typical Screw Air Compressor china rotary screw air compressor has two interlocking helical rotors within a housing. Air will come in through a valve, typically known as the inlet valve and is usually taken in to the space between the rotors. As the 
screws convert, they reduce the volume of the air, therefore increasing the pressure.
The cardiovascular of an air compressor is the screw element which can be called air-end. The air-end is definitely the most important part of any screw-type compressor. It’s that section of the machine where the actual compression takes place. It is the heart of the rotary screw air compressor.
A Rotary Screw Air Compressor is a compressor that runs on the rotary-type positive displacement mechanism, called a rotary screw, air-end. … Rotary Screw Compressors also make use of two inter-twined helical shaped screws, known as rotors, to compress the air flow.