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SIZING AND SELECTION
WHAT SIZE EXPEL DO I NEED?
Typically, the most common EXPEL fi lter for automotive and workshop applications is the EXPEL 30. Th is units
handles a compressed air fl ow from 5-30 CFM (140-850 L/Min). Most tools and compressed air equipment will
state on a label what compressed air usage they require. Th ey will also state an operating pressure in Bar or
PSI. Th e EXPEL units are designed for use in applications up to 15 bar (217 PSI)
WILL THE EXPEL REPLACE MY EXISTING CONVENTIONAL AIR FILTERS?
Th e EXPEL will replace existing fi lters that remove water, oil emulsion fl uids, and particulates down to 1 micron.
I’M EXPERIENCING RUST BUILD UP IN MY TOOLS, WHAT IS THE SOLUTION?
Th e development of rust within your tools is caused by liquid water entering the tool from the compressed air
line. Installing an EXPEL fi lter at point of use ensures that all the water is removed, preventing the build up of
rust and scale and prolonging the service life of your pneumatic tools signifi cantly.
I ALREADY HAVE A REFRIGERANT DRYER – DO I NEED EXPEL?
Yes. Often refrigerant dryers are perceived as the most cost-effective way to achieve dry compressed air, but
they are not without their pitfalls.
A refrigerant dryer is specifi cally designed to rapidly reduce the temperature of the compressed air, and this
rapid reduction causes water vapor (water in a gas state) to condense into liquid water.
To stop this high volume of water travelling through your compressed air system, a coalescing water separator
has to be installed after the dryer. Th ese fi lters are typically around 95% effi cient, allowing 5% of the produced
water to continue into your compressed air.
Most commonly it is liquid water that creates problems with pneumatic tools and equipment; from impact
wrenches through to tire changers. Liquid water will displace the oils required to lubricate tools and this
can cause detrimental damage causing seal failures, juddering or equipment seizure and in particularly cold
weather this water will freeze and expand fracturing internals and equipment casings.
If an Expel fi lter is installed at each point of use, or prior to any expensive and important pneumatic equipment
you are guaranteeing protection to that item from liquid water, oil carryover and any solid particles as small as
1 micron are removed.
It may be possible to completely remove the refrigerant dryer as the Expels provide suffi cient protection to
your equipment. As the EXPEL requires no power, consumables or replacement fi lter elements the cost savings
achieved by no longer needing a refrigerant dryer along with its associated service and operating costs would
be signifi cant.
EXPEL 30 FILTER & AUTO DRAIN SET
FREQUENTLY ASKED QUESTIONS
