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Considering the quality of compressed air, the compressed air produced by ordinary air compressors contains a certain amount of lubricating oil as well as water. In some applications, the presence of oil and water is not allowed; in such cases, it is necessary to pay attention to the selection of the compressor and also install additional post-treatment equipment (used in industries such as food production, oxygen generation, and nitrogen production). Using a lubrication-free compressor can ensure that the gas delivered is free of oil, but not free of water. It involves adding one or two more levels of purification devices or dryers to the air compressor (of any type). This device ensures that the air supplied to the compressor is free of both oil and water, reducing the oil and water content in the compressed air to a level below what is required by the process specifications. The degree of drying and purification of compressed gas also varies depending on the requirements set by the customer, which in turn influences the choices to be made. Typically, the configuration order for users is: compressor + air storage tank + centrifugal oil-water separator (pre-mounted) + refrigeration dryer + main pipeline filter + micro-oil mist filter + (adsorption dryer + main pipeline filter + activated carbon deodorization filter). Since the gas storage tank is a pressure vessel, it must be equipped with all necessary safety accessories such as safety valves, pressure gauges, and drain valves. A 1000L gas storage tank is used for exhaust volumes of 2–4 m3/min or less. For exhaust volumes of 6–10 m3/min or less, use air storage tanks of 1500L–2000L. It is recommended to make use of existing gas storage tanks or connect them in series to reduce one-time investment costs. The Betten core dryer and high-efficiency precision filters not only provide a technical solution to completely eliminate problems such as water, oil, and dust in compressed air, but also reduce energy consumption compared to traditional purification equipment. The heat-free model requires 5% of recycled gas, while the mild-heat model needs only 2% of recycled gas, **reducing the energy consumption and production costs for enterprises. Source: Professional air compressor after-treatment equipment manufacturer – dryers and filters, www.szbiteman.com