Precision filters are equipment that are paired with non powered refrigerated drying units. Under any working condition, untreated air contains many impurities such as water, rust, particulate dust, and oil. If the impurities are not removed, it will lead to additional production losses, reduce the service life of the compressor, and increase maintenance costs. Therefore, filters need to be used for treatment to improve efficiency. The equipment is widely used in industries such as pharmaceuticals, chemicals, petroleum, and environmental protection, and is an ideal device for filtration, clarification, and purification treatment.