air filter is an important component to ensure the quality of compressed air, high-quality air filters can effectively block the gas entrained dust, and can very effectively other filter element to extend the life of the compressor. Vertical folding gas separation filter is to determine the oil-injected screw compressors and compressor discharge air soaked oily film quality of key components. Out of the air entrainment large and small oil droplets, large droplets through the oil separator is easy to separate, and small droplets (suspended oil particles) must be separated by oil filter micron glass fiber bed filter. When the correct choice of glass fiber diameter and thickness of the gas in the oil mist filter to intercept, diffusion and aggregation, the effect can reach the best. Small oil droplets quickly gather into big droplets, driven by the pneumatic and gravity through filter layer, accumulate in the filter at the bottom, then back through the filter at the bottom of the hollow pipe imports return lubrication system so that the compressor discharge is more pure, oil-free compressed air. Spin on Oil filter is widely used today in the field machine oil through a new device, with ease of installation, replacement fast, sealed, high pressure, filter precision. The widely used lubricating screw compressors, piston compressors, generators, all kinds of domestic and imported heavy vehicles, loaders and construction machinery. Spin on Oil filter assembly with high strength aluminum filter head, screw compressor for lubricating oil circulatory system and works as a filter of hydraulic systems. And equipped with pressure sender, and when the filters need to be replaced, the pressure sender signal device can give directions in a timely manner.