• Spantech Engineers Private Limited

Compressed Air/Gas Filters

The Compressed Air/Gas Filters are used for removal of larger and smaller aerosols. There are two fiters available - prefilter and microfilter. Removal of oil/water is also very important for air used in instrumentation and controls, powder coating/spray painting, sand/grit blasting, high speed production machines, etc. Removal of liquid aerosol is more complex and difficult, and is achieved by the principle of coalescence, ie, forcing the aerosols to merge with each other. This is done passing the air through a glass microfibre medium where liquids are collected by the fibres, through the processes of inertial impaction, interception and diffusion. Once collected, the micro liquid particles adhere to the fibre surface and gradually buildup into bigger coalesced droplets. These droplets move along the fibres till they attain a mass, which makes them break away from the fibres. They are driven to the outside of the filter by the air stream, collected at the outer form barrier and drop out from the filter element at the bottom. The outer foam also does not allow the droplets to re entrain into the air stream. These Prefilters and microfilters are generally used in series.