Compressed air filters and oil-free compression: defining air quality
The process defines air quality requirements. “Oil-free” or a filter class alone does not describe all contaminants at the point of use.
Separate the requirements
State allowable particles, moisture and oil separately. If a standard is required, specify its exact designation, edition and test point. Select filters by function and verified characteristics, not just series letters.
Check the complete treatment chain
Compressor type, intake air, drying, piping and maintenance all affect the result. Even an oil-free installation needs defined treatment and quality-control requirements. Equipment condition matters: listing a suitable filter does not verify its performance.
Reading configurator designations
“Class 3 / C”, “Class 2 / T” and “Class 1 / A” are catalogue navigation labels. They do not certify an entire installation to an ISO 8573-1 class. Before ordering, verify the filter datasheet, operating point, connection, element life and agreed treatment arrangement.
What to prepare
- Application and quality-control point
- Separate limits for water, particles and oil
- Exact datasheets for selected treatment stages
- Maintenance and element replacement
This guide helps assemble inputs. Check the complete datasheet for the specific model’s conditions.