With 16 years of experience in the manufacturing of permanent magnet motors and 10 years of experience in processing rotary screws, we have designed a series of high quality two stage air compressors. Our two stage permanent magnet rotary screw air compressor uses SKF precision bearing, which has improved its loading capacity, made it run in a more stable state, lowered the noise and reduced the operating cost largely.

Features of two stage compression
The same pressure ratio is used at each step of the two stage compression and interstage pressure is set to lower each step of pressure ratio than independent one, which reduces the backflow leakage among rotors and improves the volumetric efficiency and adiabatic efficiency.

After the first-stage compress, the air is cooled by oil injection in interstage, then reducing the second-stage suck temperature. The whole compression is nearly isothermal, which can reduce the power of compression effectively. In this case, MDE series two stage rotary screw air compressor with single permanent magnet motor drive can save 15% energy at same circumstance compared with variable speed two stage rotary screw air compressor with single permanent magnet motor drive.