Compressed Air Transmission and Treatment:Check list for compressed air filters

Check list for compressed air filters

I. Determine the type of compressor lubricant used before selecting a filter. Some filter components such as gaskets, seals and transparent bowls are not compatible with certain synthetic compressor lubricants. Deterioration of these components in contact with such lubricants may cause the filter to burst causing injury.

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2. Check that the pressure rating and flow capacity of the filter is greater than the pressure and flow at the point of installation.

3. Inspect the filter for shipping damage. Replace the whole unit if damage is apparent.

4. Install filters down stream of aftercoolers and receivers.

5. On critical lines, where the air supply must not be interrupted, it is good practice to incorporate a good by-pass system complete with standby filter at the filter location.

6. If the filter does not incorporate an automatic drain facility, install a drain trap or drop leg below the filter and drain frequently. This will prevent liquid from accumulating in the bottom of the filter housing or impairing the efficiency of the filter element. Do not exceed the flow capacity of the drain system on start-up since compressed air lines may accumulate large amounts of water while shut down.

7. A compressed air filter is a pressure vessel. While in service, filters must be depressurised before any maintenance is attempted. Depressurise filters by slowly opening the drain provided for condensate removal. Failure to do so can result in equipment damage or injury.

8. Follow the manufacturer’s warnings with regard to cleaning the filter, to avoid damage to filter parts. Since some cleaning solvents attack seals, transparent bowls or housings, these should be cleaned only with soap and water.

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