air pressure not fully releasing from tank

by George
(Lafayette,La.)

DeWalt 1.5hp dual tank side by side model w/front wheel-electric .


pressure builds up to max as set, but the pressure release is inadequate. one tank acnnot be fully drained and retains 80# pressure.
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Hi George...

Since I don't have a model number to try and find a photo of this air compressor online, it is difficult to nail down a reason.

If I understand correctly, you are using air, the air pressure in the tank drops to 80 PSI and no further down, but in only one tank?

Does this model have a regulator and / or a gauge for each tank?

What happens when, with the compressor off, you open the tank drain all the way? Does the gauge still read 80 PSI when the tanks are empty?

Since one tank stays at 80 PSI, does the compressor not restart when you use air?

What is the normal cut in and cut out pressure on this air compressor.

Provide a bit more info as a comment here, and perhaps we can help nail this down for you.

Cheers,

Bill


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d55152 type 1 cold start valve problem?

by mcgregor
(california)

So I have a Dewalt d55152 compressor that runs and builds pressure fine and shuts off normally once it has reached 110 psi.

Once it shuts off air is escaping from the needle in the cold start valve.

Enough air escapes that in about 5 minutes the compressor will start again and stop just like a normal cycle when being used but with the air continually coming out of the cold start valve.

I have changed the cold start valve twice and the same problem persists.

I have read replacing the reeds but as the compressor runs fine I am not sure this is the problem. There is no air escaping from any where else and I am stumped on what it could be. Any ideas?
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Well, I'm not entirely sure what you mean by cold start valve, mcgregor.

If you are referring to the unloader valve that is located in the pressure switch, then I my first thought is that you have a tank check valve that is leaking.

With the compressor off and the tanks empty, pull the tank check valve and ensure that it is clean and working.

Cheers,

Bill

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it keeps blowing condensation through air hose

by Dennis
(Valdosta,Ga,USA)

I've drained water from the 20 gal tank and every time I hook it up to my plasma cutter, water starts draining from the air hose connected to the plasma. Please tell me why this keeps happening and will it hurt my plasma cutter.
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If the compressed air blowing into the air lines from the compressor is warm, Dennis, then as that air travels to the cutter it cools, and as it cools, water condenses out.

See the link in the navigation bar about compressor water for more details.

I cannot tell you if the compressor generated water is a detriment to your plasma cutter. That info has to come from the manufacturer of the equipment.

If you aren't using a water filter just before the cutter, then install one to remove the free water and, if condensate in the machine is a problem, then add a dessicant filter after the water filter would be my suggestion.

Cheers,

Bill

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DeWalt D55168 Unloader Line Missing?

by Jesse
(Virginia, USA)

Okay so I have a DeWalt D55168 and it build way too much moisture during use. So I purchased a Automatic Drain kit "model 68244" and it ask's me to tap into the pressure switch unloader line. Which I could not locate on my specific model, seems like the type 1 had a unloader line but not the type 2.

How would I need to go about hooking this automatic drain up correctly? Or do I need to get a digital one that does it on a "timer"?
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Jesse, I looked up images for the DeWalt D55168 air compressor, and for the type 2. As far as I can see both have an outlet line running from the tank fitting over to the pressure switch.

The pressure switch is a Condor which has an internal unloader valve, I believe.

I tried to find information on your drain kit, as I have never heard of one that's installed in the outlet from the tank fitting to the unloader valve, and I wanted to see what it was and how it worked.

No joy.

If you look at auto drains on this site, you will find that all are designed to fit into or replace the tank drain that is at the bottom of your tank because, after all, that's where the water that has condensed from vapor into liquid form will come to rest, and where it must be discharged from.

Start a new thread if you will and upload pictures of your drain kit for all to see.

Thanks,

Bill

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Nov 03, 2013
Link to the Drain kit
by: Jesse

www.harborfreight.com/automatic-compressor-drain-kit-68244.html
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Thanks Jesse. I went and had a look.

The site didn't have the instructions posted so I couldn't double check what you had written earlier.

I did read the review, and by and large, they were positive.

I just hope that folks that are using this still open the tank drain regularly as I believe that water vapor will still condense in the tank when it cools, and you will need to get that water out too.

If you have, by any chance, the manual in electronic form, I'd sure like to see it.

Bill

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