The Hi-Flux coalescing, adsorbing, and microbiological filter elements were developed by Metalplan to eliminate every specific form of contamination, providing maximum air quality generated by any type of compressor in any environment.

Compressed air contamination takes various forms, with particular emphasis on water, oil, and solid particles, according to the international standard ISO 8573. Water comes from the humidity present in the ambient air (water vapor), while oil and solid particles have two sources: atmospheric air and the compressor itself.

Among the Hi-Flux compressed air filter elements, coalescing models are the most versatile, capable of retaining solid contaminants as small as 0.01 micron, as well as water and oil aerosols with minimal mass, whose behavior resembles that of a gas.

Hydrophobic borosilicate nanofibers, impermeable to oil and water, are responsible for coalescence, which is the aggregation of small condensate droplets (aerosols) into larger droplets, subject to gravity action.

The condensate precipitated at the bottom of the filter housing is drained to the exterior by an automatic drain. Appropriate condensate neutralization systems allow its disposal into the environment without risk of contamination.

Solid particles, on the other hand, are trapped inside the nanofibers, causing element saturation. For this reason, coalescing filters are also notable for their high efficiency in promoting "depth filtration."

In addition to the coalescing elements M40 (fine) and M20 (ultrafine), there are two more compressed air filter media in the Hi-Flux family: the adsorbing elements (grade MA) and microbiological elements (grade MB).

The main component of the adsorbing elements is activated carbon, whose base is highly porous carbon capable of selectively retaining gases or impurities inside it, with high clarification, deodorization, purification, and removal of toxic and radioactive materials. Activated carbon is obtained from the controlled burning (800°C to 1000°C) of selected organic matter in an atmosphere with low oxygen content.