oily smell in tank drain water

by Darnell
(Honolulu, Hawaii)

When I drain the air tank, red milky water comes out. Smells like oil or coolant is

mixing with the air. What else can be done or checked?
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Darnell, make of compressor? Model number? Age? Hard or light use? What color is the oil in the sump?

I can't specifically help you without specific information on the compressor as not all are the same.

Please provide more information as a comment to this post.

Cheers,

Bill



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Apr 14, 2014
reply
by: Darnell

Ingersoll Rand. Ser#PG0499U04019,Model# UP6-40-125, moderate daily use for production. The oil is Dark in color, had some grittiness to it when I drained some out. There's also oil discharge from drain.
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This is an air colled, 40 HP, 125 PSIG output rotary screw air comressor. While I suspect that you have an issue with your oil separator, I'll leave details to those with actual experience on these air compressors. Anyone have advice for Darnell?

Thanks,

Bill

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Water accumulates in the sump oil of Ingersoll Rand

by Dave Giles
(Auckland. New Zealand)

I have bought (12 months ago) a new 2 stage Ingersol Rand compressor.

The problem is that water accumulates in the sump oil until the compressor starts to squeal. This is how it first came to our attention.

Three times we have undone the filler to find it over flowing. We have drained it, found water mixed with the oil, refilled with clean oil.

when restarted it sounds great an obvious change in pitch.

My colleagues suggest that running for approx 2 minutes at intervals of 15-20 minutes minimum to approx 30 minutes or so is about a good run time for a large industrial piston compressor

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Oct 21, 2014
water in sump
by: Ryan

If your machine have a very low duty cycle the machine wont get to a temp where it could burn off the moisture in the oil.Also if a thermostat is bypassed that could happen.

Sep 09, 2014
Chemically remove moisture from the air
by: Bill

"chemically remove moisture from the air" typically known as desiccant filters, and are normally used to strip compressed air of water before the compressed air gets to a sensitive air tool or application, after compressor.

I don't know of any that are used to dry intake air, as the cost would be enormous.

Industrial installations of desiccant filters include "twin stack" regenerative type, and there are many manufacturers / vendors.

On recip compressors, water in the sump typically means piston seal blow by and is an indicator that it's time to replace the cylinder seal(s).

B.

Sep 08, 2014
Air Filtration
by: Mike P in Vegas

I've heard of these things existing, but have never seen one - but perhaps some research on your part can dig-up a solution: Air filters which chemically remove moisture from the air, prior to its intake into the compressor...

Having such a "drying filter" would be a huge step in mitigating your problem of water vapor (present in most all air) being squeezed into water droplets, which is fowling your oil.

Sep 08, 2014
Water accumulates in the sump oil
by: Bill

See all the pages on this site about compressor generated water (under compressor issues in left nav bar) and how that water can get into the sump.

I suspect a high level of humidity in the ambient air is contributing to the issue, along with quite possibly extended air compressor use.

Bill

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Ingersoll-Rand blowing oil

by mark
(uk)

Hi there we have a problem of milky oil flowing out with the air we have changed the oil/air separator and still the same

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Mar 20, 2015
scavenger pipe
by: mark

hio there not sure on model will find out monday but the scanveger pipe got cleaned when the filter was changed

Mar 19, 2015
Model?
by: Doug in s.d.ca

But I take it that it's a screw type?

Did you check the scavenger tube?

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Oil in the air in an Ingersoll Rand EP50SE rotary compressor

by Martin
(Marietta, Ga. USA)

Ingersoll Rand EP50SE rotary screw compressor

Ingersoll Rand EP50SE rotary screw compressor

We have a Ingersoll Rand EP50SE (rotary screw)that runs our pneumatic equipment. Recently, if I use it there is a strong smell of oil in the plant. I have had some experience with these and the 100 H.P. model. I have seen collapsed separators cause this before.
But I removed the separator and it looked fine (I replaced it anyway, it was time), it has a new air filter, I removed and cleaned the scavenger tube and have generally inspected the machine without finding out whats causing the oil in the air.
This compressor is about nineteen years old and as far as I know it is the original air end. Could wear in the air end cause this? What else could cause it? I have it shut down and I'm using our smaller back up compressor for now.

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Feb 11, 2015
oil
by: Doug in s.d.ca

OK -

Let us know what they find, please.


Feb 11, 2015
Oil in compressor air
by: Martin

Yes, it seems to operate normally otherwise. I've broken down and called the local Ingersoll Rand service center to send someone to look at it.

Feb 10, 2015
oil
by: Doug in s.d.ca

Hard telling why it would wear, but if it did then oil would be atomised from blowing thru the worn spots.

Other than the smell, is it performing as usual?

Feb 10, 2015
Oil in the air
by: Martin

Everything seems fine as far as I can tell. The hour meter has been around once or twice so don't really know how many hours it has on it. I've only been dealing with it for about two years.

Feb 10, 2015
oil blocked?
by: Doug in s.d.ca

From what you say, probably not.

But at 19, any idea how many hours that is?

How long have you "known" it?

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