The air treatment equipment of screw air compressor is mainly composed of air storage tank, dryer and filter. The filter part is divided into pre-filter and post-filter, usually separated by a dryer. Compressed air is sent from the unit to an air storage tank, pre-filter, dryer and filter. Post-filters are used to complete purification processes such as filtration and drying.
Today the editor introduces the difference between air compressor pre-filter and post-filter? A pre-filter pre-filters and cleans the compressed air, removing large amounts of water, oil, and larger particles to filter, and plays a maintenance role. Air compressor prefiltration is therefore a pretreatment of compressed air that stops prefiltration and filters larger particles.
Pre-filter:
Removes liquid water, lubricants, and particles larger than 1 µm in diameter. Both adsorption and refrigeration dryers require a prefilter. Otherwise, when the evaporator is blocked by rust or other particles on the pipe, it will greatly reduce the working efficiency of the refrigeration dryer and damage the evaporator. Post filters are relatively accurate. Compressed air enters the aftertreatment and basically there is no liquid discharge. Assuming that the compressed air containing many impurities is directly treated with the post-filter, maintenance of the pre-filter, which causes air-water separation, becomes unnecessary. The phenomenon of clogging or breaking of drain valves and drain valves.
Post filter:
Removes oil mist concentration in compressed air to a higher standard, removing oil mist concentration of particles of 0.01 μm or more and oil content of 0.001 ppm or more. Under normal conditions, very little liquid water leaks through the rear filter. If yes, it means that the refrigeration dryer's air-water separator or drain he valve is defective.
In summary, the main function of the pre-filter is to pre-filter and purify the compressed air, allowing it to filter large amounts of water, oil and large particles while protecting the unit. Air compressor prefilters are therefore a pretreatment of the compressed air, prefiltrating to filter out relatively large particles. Post filters are relatively accurate. When compressed air enters the aftertreatment, basically no liquid is discharged. If heavily contaminated compressed air is not protected by a prefilter, it is treated directly by a postfilter. This can clog or even damage the steam separator and drain valve.
