Compressed Air Filters

save the end products against spoilage
protect the air net and tools
for low installation costs
are reliable in operation
have low power consumption
require minimum maintenance
give sure, safe performance
favourable cost/efficiency ratio

Compressed air filters remove oil and liquid particles and oil vapours. Coalescing filters to remove water and oils have efficiencies from 99.98% at 0.1 micron particle size to 99.9999% at 0.01 micron. The filters should have a maximum wetted pressure drop of 3 to 3.5 psi. The maximum pressure drop, normally 10 psi, determines the service life of these filters. Expect to replace the filter elements every six to twelve months.

High-performance coalescing filters require changeout every five years. Although these filters have a higher first cost the lower pressure drop and reduced energy and maintenance costs provide a simple payback of less than one year.

Particulate filters installed downstream of a desiccant dryer should have a different pressure gauge to indicate the condition of filter elements rated for a nominal efficiency of 99.95% at 1 micron particle size and initial pressure drop of 1 psi. Coalescing filters must have a high-quality automatic condensate drains.

Vapor removal and filters absorb oil vapors with activated charcoal. Location and the oil concentration determines filter element life. Normal pressure drop for a vapor removal filter is 1 psi.

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