Saturated compressed air first enters the higher temperature refrigeration dryer pre-cooler, in the pre-cooling vessel and from a local dry cold evaporator heat exchange, after the initial lower temperature to give into the evaporator, where the evaporator is compressed air and a second refrigerant vapor compressor manufacturers supply heat exchange, the temperature was further reduced to close to the refrigerant evaporation temperature; in the two cooling process, the compressed air saturated water vapor to condense into liquid water droplets into the air, and gas-water separator, separator to separate the liquid through automatic drain (not shown) from the plane screw compressor manufacturers, low temperature dry air is returned to the pre-cooler large air compressor manufacturers, and just entering the saturated air heat exchange, so that the temperature itself is improved, resulting in cold and dry vents get a lower water content (ie, lower dew point) at the same time lower the relative humidity of the drying air. From the above analysis shows, pre-cooling, evaporator and air-water separator is cold and dry compressed air flow system of hollow three major components. A) lubricating properties: viscosity compressor oil lubricated with compressor oil performance quality related. Generally speaking, there is no viscosity or viscosity reduction means lower after oil lubricated compressor performance deteriorated compressor oil of lubricating properties. This can not form a sufficient film strength, adhesion or adhesion deteriorates accordingly. Will not achieve good lubrication. Compressor oil performance advantages and disadvantages of test: the compressor oil stained friction between thumb and forefinger, if feeling sticky. It can be concluded that there is good air compressor oil lubrication properties. If astringent feeling, it can be concluded that compressor oil has been lost due to the lubricating properties. B) Moisture: The compressor oil into the test tube. It appears cloudy, it was observed transparency. If it is not crystal clear. You can determine the initial compressor oil contains water in the end in order to determine whether the oil contains water, there are two reliable methods: 1. Anhydrous sulfuric acid steel (red powder) into a test tube containing the compressor oil. This also proves that the oil in the presence of moisture contained in the two methods do not give much moisture, such as copper sulfate from white to blue. Depending on how much and how much can be empirically applied copper sulfate compressor oil during heating bubbling to estimate. 2. The oil poured into the tube to be tested. On alcohol lamp heating. If bubbles appear, fuel two-thirds of the tube volume. The tubes with cork and wax sealed after opening. At the same time issued a "pop" pop "sound, and in the wall of the tube above the oil water droplets condense, can explain the presence of moisture in oil compressor manufacturer leasing, Qin Wei Air (certified), Cangzhou compressor manufacturers By Xianyang Qin Wei Compressor Co., Ltd. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) is Xianyang, compression, separation equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness , the maximum meet customer needs. In Qin Wei Pneumatic leadership with the staff warmly welcome all inquiries negotiations to create Qin Wei Pneumatic better future.