1, piston rings and packing filler apparatus piston oil-free air compressor oil-free air compressors are used to fill the cylinder with a self-lubricating properties of PTFE as a sealing element. Therefore, the injection cylinder and packing equipment without lubricating, under normal circumstances, after essentially pure compressed gas free of oil, without increasing the oil cleaning device. The disadvantage is that the machine motor power is too large, the discharge pressure is not stable enough, the exhaust temperature is high, the noise is too large, maintenance workload air compressor manufacturer, high maintenance costs. 2, screw-type air compressor screw air compressors yin, yang and precision with the rotor and the rotor body shell gas recirculation reduces leakage and improve efficiency; only intermeshing rotors, no cylinder reciprocating motion, reducing the vibration and noise sources. Unique lubrication has the advantage by virtue of the pressure difference generated itself, to keep the compression chamber and bearing coolant injection, simplifying complex mechanical structure; injection cooling fluid can form a liquid film between the rotor, the rotor can be used directly by the deputy main rotor drive, without the help of high-precision timing gears; injecting coolant can increase the role of airtight to reduce noise generated due to high frequency compression, but also absorb a lot of the heat of compression, and therefore Which compressor manufacturers Well, even a single-stage compression ratio up to 16 also allows the exhaust gas temperature will not be too high, not because of different thermal expansion coefficients of friction generated between the rotor and the casing. So air compressor manufacturer leasing, screw air compressor has vibration, without using anchor bolts on the foundation, motor power, low noise, high efficiency, the exhaust pressure is stable, and no wearing parts and so on. The disadvantage is that the aircraft out of the air compressed by the oil, the oil content of 1 ~ 3 × 10-6, the oil content of the compressed air demanding processes need to increase oil removal equipment. The plant's compressed air system has increased by two oil cleaning device. Since the compressed air ADC step ADC foaming agent in direct contact with the product, so the air quality requirements more high, ADC process gas oil means increasing the air compressor after three years of development has been the first piston single species the development of screw, vane and other major types. Simple screw air compressor has a structure, reliable operation and easy operation and a series of unique advantages, due to the widespread industry attention. Currently screw compressor which can completely replace the piston compressor, and it has a lot of piston possess advantage, it is a high-speed rotary positive displacement compressor, comprising a pair of rotors through the intermeshed helical spline, resulting in changes in the volume of the gas compression, in addition to the two high-speed rotation of the screw rotor, there is no other moving parts, to overcome the rotary compressor (centrifugal compressor) and reciprocating compressors (such as piston compressors) for their shortcomings, with such a small size, light weight, smooth operation, less wearing parts, high efficiency, single-stage compression ratio, energy stepless adjustment, etc., in the compressor industry has been rapid development and application. Since single-stage screw refrigeration compressor has a larger compression ratio and a wide range of capacities screw air compressor manufacturer, it is suitable for high, medium and low variety of conditions, especially at low temperature conditions and the situation remains variable condition has a high efficiency, the advantages are other models (such as absorption, centrifugal, etc.) do not have. Therefore, screw refrigeration compressors are widely used in various industries, the food industry air conditioning, refrigeration, beer, chemical, water, etc., is the field of refrigeration especially industrial refrigeration best models. Screw was divided in two and twin screw single screw. Twin-screw machine applications common in the market. Heze air compressor manufacturer, Qin Wei pneumatic, oil-free air compressor manufacturer is provided by Compressor Co., Ltd. Xianyang Qin Wei. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) is Xianyang, compression, separation equipment leader, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Qin Wei Pneumatic leadership with the staff warmly welcome all inquiries negotiations to create Qin Wei Pneumatic better future.