The screw air compressor is one kind of air compressor, and it can be divided into twin-screw type and single-screw type. The invention of the twin-screw air compressor is more than ten years later than the single-screw air compressor. However， the design of twin-screw air compressor is more reasonable and advanced. Overcoming the single-screw air compressor’s disadvantages of imbalance and bearing vulnerability, the twin-screw air compressor possesses the advantages of long life, low noise, and more energy saving.

Screw air compressor adopts high-capacity compression module. Its Rotor external circular velocity is low and it reaches the best oil injection, realizing high efficiency and high reliability. By 2012, manufacturers were designed to ensure that system temperatures and compressed air temperatures were extremely low, which ensures all components achieve the optimum cooling effect and maximum service life. And no maintenance was required during normal operation. There are the advantages of no maintenance, high reliability, and high efficiency. Meanwhile, the original design of screw air compressor saves unnecessary maintenance costs. All components are designed for long life. Large-size inlet filter, oil filter, and fine separator ensure the best-compressed air quality. All oil filters and separator assemblies within 22 kW (30 hp) adopt centrifugal opening and closing,  which further reduces maintenance time.