Pneumatics Tools

What Are Filter Regulators?   


jauhar khan 
@jauhar123 | Posted 30 Aug. 2019


An airline filter purifies compressed air. It strains the air and traps solid particles (dust, dirt, rust) and distributes liquids (water, oil) entrained in the compressed air. Filters are installed in the airline upstream of switches, lubricators, directional control valves, and air driven tools such as cylinders and air motors.


Reliability is one of the strongest motivations to use compressed air, and proper filtration is the solution to maximizing reliability and longevity. Compressed air can offer condensed water, oil carryover from compressors, solid impurities (pipe scale and rust) generated within the pipelines, and other wear particles from the ambient air. These contaminants can cause difficulties at every point of benefit and should be removed by installing fitting filters.

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Many Festo Filter Regulator manufacturers will determine the expected pressure loss and dirt holding capacity, utilising curves related to stress and flow. Therefore, the particle -removal filters should be selected based on acceptable weight drop – and pipe-connection size. A typical weight drop through such filters would be between 1 and 5 psig.


A filter with higher body size will produce less initial pressure loss and give longer operating life than a smaller size filter with the corresponding removal ratings. The charts compare pressure drop through numerous particulate filters that all have identical 5-µm removal capacity.