Excessive oil in the lines

by Al Kandziorski
(Batavia IL USA)

Even with a large amount of different types of filters we are still seeing oil at our CMM's (coordinate measuring machines).

To be honest we are getting a LOT of oil. We use a Rotary type compressor ( Ingersoll Rand )due to the fact we were told this was a cleaner type of compressor.

These machines actually float on the ways via multiple sets of air bearings and oil is very undesirable.

Any and all input to
(1) Finding out just where this oil is coming from and
(2) How the heck is it getting by a bank of multiple coalescing filters
Would be greatly appreciated!!


Most industrial compressors have oil separators, devices that take most of the compressor lube oil out of the air stream. They don't however, take it all.

If you are seeing an inordinate amount of oil, the separators in your compressor may be having a problem. This should be checked.

Coalescent filters take out liquid oil. If you are still seeing oil at your machines, then it's condensing there from oil in aerosol form, and you need to step up your compressed air treatment.

Check with a compressed air FRL company like Norgren about their line of compressed air filters that strip oil aerosols from the air stream. Add one of these downstream from the coalescent, and that should do the trick.



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Gel clogged output air filter.

Air compressor clogs output airfilter with a clear, gel like substance. What can be done to prevent or stop this from happening?

Good grief!! We're being attacked by the blob from the air compressor!

All kidding aside, I've never heard of this one.

What type of air compressor is it please?

What is it that your business is doing, or making?

Is there anything other than air possibly entering the intake port?

Where is the air filter that's clogging up in relation to the air compressor?

Fire me the answers to these on this same thread, and we'll go from there.



Comments for Gel clogged output air filter.

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Jul 23, 2013
Having similar gel issues clogging the output air fitler.
by: Anonymous

Hello, I'm having a similar issue with my compressor. I have a Quincy 2 Phase 60 gal compressor and I have the output hooked up to some IR ARO air filters. The first stage air filter has been completely destroyed by the build up of this gel like goop.

The gel dries to a clear white powdery substance. The compressor is connected to the filter via a copper pipe about 2 feet in length so there is nothing inbetween.

I called Quincy but they didn't know what this was either. Any ideas?

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Removing water from compressor air line

by Truman
(Bellville, Ohio)

I have a cabinet shop and do my own spraying (lacquer mostly). sprayed a large cabinet and had bubbles (water)in the lacquer. Here is my set up: Sears compressor model # 919.167600; 1.6 hp, 26 gal, 160 psi.

Compressor serves as my main compressor for running nail guns and for doing my spraying.

My spraying system is a HVLP system. My spray gun runs off a pressure pot with 25'of air and fluid hose.

My compressor and spraying system set side by side.

I T'd off the line on the compressor and run a separate line for spraying. The air line for the sprayer runs through it's own regulator then through a Sears air line filter model #16008 with a 40 micron filter element. From the compressor to the pressure pot is about 8'. From T on compressor to regulator is 3'(rubber air hose). From regulator to filter is 1', then from filter to pressure pot is 4' (rubber air hose).

I would like to solve this problem as simply as possible and as cheaply as possible (I know these two don't usually go together, but one can always hope). If I used a longer air hose (50') from filter to pressure pot would this allow the air to cool enough to avoid water in my laquer? What if I put another filter at the pressure pot? I just don't know but I can't have this problem, it requires too much time to resand and respray. Any input would be greatly appreciated.




You can take all the free water out of an airstream, and yet have water appearing again just a bit further down the air line.

You need to understand that water is both free (liquid) and vapour, and it's the vapour that condenses further down the line into free water that's likely causing your problem.

What you want to consider is an in-line desiccant dryer installed just before the gun to rid the air stream of residual water and water vapor too.

See the page on desiccant dryers on this site for more info.



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