Compressor filtration performs different jobs at different points in the system. Intake air filters help keep airborne contamination away from the compression element. Oil filters help keep contaminants out of the lubricant circuit. Air/oil separators reduce lubricant carryover from oil-injected compressor discharge. Downstream line filters are selected according to the compressed-air quality required by the application.
A filter that physically fits is not automatically correct. Important factors can include element dimensions, sealing design, collapse strength, flow capacity, pressure drop, operating pressure, temperature and media type. For separators, internal design, grounding provisions and application-specific construction can also matter.
When requesting a replacement, provide the part number first. If unavailable, send element dimensions, photographs of both ends, gasket or flange details, machine model and serial number. For line filters, include housing model, port size, flow requirement and the required filtration stage where known.
Compressed-air purity requirements are commonly described with ISO 8573-1 classes for particles, water and oil. The required treatment train should be selected according to the end-use requirement, not simply by adding the “finest” filter available.
Technical information is provided for identification and procurement support only. Always follow the equipment manufacturer’s service, safety and installation instructions.