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Pure water instead of lubricating oil is used in the air end for lubrication. The air end and all parts in contact with water are made of 304 food-grade stainless steel. Compressed air passes the TUV oil-free test and also meets the requirements of the FDA and GMP. With no oil in the whole water-injected screw compressor, maintenance is simple and only requires the replacement of the 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. The water-injected compressor unit operates at an exceptionally low temperature, typically around 45 degrees Celsius, ensuring efficient cooling and energy use.

The advantages of the CMN oil-injected screw compressor are reflected in its outstanding energy-saving effect and variable frequency performance. The unit is equipped with a high-efficiency permanent magnet variable frequency motor and variable frequency drive, which automatically adjusts the speed to reduce energy consumption. Maintenance only requires replacing the filter element and air compressor oil. The CMN oil-injected screw air compressor is designed with no wearing parts, making maintenance simple and the designed service life is more than 20 years.

CMN oilless scroll-style air compressor has an air supply pressure of 2 to 12 bar, a gas production volume of 255 to 1660L/min, and an ultra-quiet design. As one of the best oil free compressor suppliers, CMN oilless scroll style compressor is suitable for various processes with small gas consumption but high cleanliness requirements. The main components of the unit are a high-precision square air end, permanent magnet motor, frequency converter, and stainless steel gas storage tank.

Coalbed methane compressor are mainly devices with water injected screw compressors as the air end, which are used in coal mine gas recovery, natural gas secondary recovery, oil fields, refineries, natural gas chemical plants, vinylon plants, chemical fiber plants and other petrochemical enterprises , as well as combustible gas recycling at liquefied gas stations and strategic combat readiness oil depots.
This product can not only recycle energy, but also significantly reduce environmental pollution. It has reliable quality, good cost performance, and is highly competitive in the domestic market. So far, coalbed methane recovery devices have been promoted and applied in petrochemical enterprises such as oil fields, refineries, natural gas chemical plants, vinylon plants, and chemical fiber plants. As a natural gas compressor manufacturer, CMN provides excellent compressors that effectively reduce pollution.

The working principle of the pure oil-free screw compressor is the same as that of the normal pressure oil-free screw air compressor. The difference is that the low-pressure screw air compressor is equipped with a low-pressure stainless steel air end with a compression ratio of 1.2 to 4, and the air supply pressure of the unit is 1.2 to 4 bar. The unit has good stability and low energy consumption.

Thermal adsorption type - uses part of the dried compressed air to purge the adsorbent after decompression to achieve "regeneration" of the adsorbent; Microthermal adsorption type - the difference from the non-thermal adsorption type is that the compressed air used for purging is heated by an electric heater.