Oil cooler is the use of oil to lubricate, cool and seal, and the machine needs to cool the oil if it wants to maintain a reasonable temperature. Therefore, there are air cooling and water cooling. Air cooler uses an aluminum cooler to force convection through a fan. To achieve the effect of cooling the engine oil, water cooler is achieved by heat exchange between the spiral copper tube and the water to achieve the cooling effect. The installation of the air-cooled machine is relatively simple, but it is greatly affected by the environment. Frequent maintenance is required in places with poor ventilation or poor environment, otherwise it is easy to be high temperature; water cooling needs to install a cooling tower water pump, but water-cooled machines have low environmental requirements and are stable. If small machines (below 50HP) are air-cooled, large machines It is suggested that water cooler will be more stable. For example, our common compressor oil cooler, 1614886900, 225344000, 1623711900, 1202604500, 8829017-243