Water in Quincy 325 oil

by Jim

Water in Quincy 325 oil, timed unloader valve solution.

Since installed, I have found a lot of water in the oil from what I assume is inlet air.

My compressor is largely oversized and rarely runs more than 35 seconds so the compressor doesn't get hot enough to evaporate accumulated moisture.

My solution is to run the compressor for a longer period using a timer and blow off using the unloader valve.

Any ideas if this will work?

Can the unloader be closed if the tank psi drops below the start point during the blow-off period?

Comments for Water in Quincy 325 oil

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Jun 01, 2016
Crankcase Heater to Keep Water Out
by: Warren

I had the same issue with my Quincy 325. Every 60 days I would run the compressor for a couple of hours heat up the oil to try and evaporate the water but with very limited success.

I finally found a 5" long 1/4" dia. 300 watt 230 vac heater. I hooked it up to a 120 vac (about 70 watts at 120 vac). I leave it on 100% of the time and it keeps the crankcase about 115 deg F.

I installed it thru the oil drain connection.

I would like a longer heater (10") but I will have to have it special made at Plastic Process Equipment where I purchased the one I have. But it has worked for me and because it is warmer that the surroundings it keeps the water out.

FYI I run synthetic oil in my compressor.

Apr 04, 2016
by: Doug in s.d.ca

Another new one, maybe...

Might work.

Two things, though. Why not just open the drain for a while? Maybe partially, so the pump has to WORK.

Test that manually, and if it does work do the timer.

And yes, the PRV (that's what I take your reference to unloader valve is) can be pushed in once below rated pressure, or will sometimes self-reset at something over 0 psig.

HTH, and let us know how it goes.

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