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Since the founder Mr. B. Zimmern proposed the single-screw compression structure in 1960, CMN has brand history of over 60 years. We have formed a set of strict production management systems and processes to ensure the stability of the machines we manufactured; based on our R&D team of more than 30 people, CMN has always been a leading enterprice that focuses on innovation in the pneumatic industry. CMN has three factories and more than 20 dealers around the world, our corporate purpose has always been to focus on customer needs, continuously improve products, and realize the value of CMN.

Pure water instead of lubricating oil is used in air end for lubrication. Air end and all parts contacting with water are made of 304 food grade stainless steel. Compressed air passes TUV oil free test and also meets requirements of FDA and GMP. With no oil in the whole machine, maintenance is simple which only requires the replacement of air and water filter. Water injected screw compressor adopts a direct coupling method between the air end and the motor, resulting in high transmission efficiency. Due to the direct injection of water for cooling circulation, the unit operates at a very low temperature which is around 45 degrees Celsius. Working Principle Of CMN No Oil water injected compressor The single screw air end is composed of a main screw and two symmetrically arranged flat star wheels to form a meshing pair, installed inside the stainless steel shell. The screw's groove, the inner wall of the air end shell, and the tooth surface of the star wheel constitute the compression chamber. The motor directly drives the rotation of the screw shaft, which drives the rotation of the star wheel. The gas enters the screw groove through the suction port, undergoes compression, and is then expelled through the exhaust port on the air end shell. There are spray holes on the air end shell for injection of lubricating oil or water into the compression chamber, serving as sealing, cooling, and lubricating functions.

Oil Injected compressor are widely used in various industries to provide compressed air power. CMN oil injected screw air compressor adopts patented shaft sealless design to ensure that the air end will never leak oil. The unique single-screw type air end achieves twelve times of compression in one rotation, with high efficiency. The ultra-high machining accuracy allows the air end to achieve good sealing and lubrication effects by spraying only a small amount of lubricating oil so the oil content can be less than 2ppm to meet most usage requirements. OIL INJECTED SCREW COMPRESSOR VS RECIPROCATING PISTON COMPRESSOR Piston air compressors use the piston to reciprocate in the cylinder to compress the air. They have high noise and vibration and many wearing parts. After the piston rings are worn, the air volume will decrease causing the decreased efficiency.

The entire series of CMN oil free compressor in china are certified by German TUV Rheinland for oil-free, in cordinate with level of Class 0. Unlike traditional dry type oil air compressor free that rely on seals to prevent oil from coming into contact with air, CMN oil free industrial air compressors do not contain any lubricating oil in the entire machine, ensuring a lifetime supply of pure oil free compressed air. CMN, as a oil free compressor suppliers, the compressor adopts permanant magnet variable frequency motor to ensure high efficiency. For more information about difference between oil free and oil compressor and a screw compressor, please feel free to contact us!