Removing water from compressed air lines in a outdoors application

We typically work on job sites that can often be cool - ambient temeratures around 30 degrees F are not uncommon - We rent a portable, typcially diesel powered air compressor from a local rental company - these units are typicaly rated around 185 CFM etc - we power an air tool to instal threaded fasteners in steel tubing - the air tool requires about 100 psi when running and approiximately 25 SCFM. We have continual problem with tools freezig up. What is the best and most cost efficient way of eliminating or minimizing this problem. Is there a particular type of air dryer that can be recommended. Thanks in advance for your help.


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Bill says...

As the compressed air rushes to atmosphere through an air tool, cooling takes place, and if the ambient temperature is near freezing, frozen air tools result.

You need to understand how water is generated, and the various methods of treating compressed air to remove sufficient water so that your problem is solves.

Start here, and follow the links.

Cheers,

Bill

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drying the air for a plasma cutter

by Brian
(Kimberley B.C. canada)

Hi, I have a small compressor (5-6 cfm at 90psi) that I use with a small plasma cutter. I'm going through tips (consumables) quickly and am told I need to dry the air. What is the best way for me to do this (and cheapest)?

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Bill says...

Howdy Brian. Yup, all air compressors generate water, and depending on the season, the relative humidity of the intake air, and the compressor heat as it runs, there could be a lot of compressor generated water in the tank, and in the air lines to your app.

I have written about this in detail. Click the link "Compressor Water" from the navigation bar and read those pages. After which, if you still have questions, please add a comment here so I can follow our chat.

Cheers,

Bill

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Why would my Devair DRD50 air dryer not let the air go through it?

by choked
(Calgary,Alberta)

My air dryer in our shop will not let the air flow through later in the day , mainly in the summer. We have replaced the seperator element/ filter in the moisture separator 2 weeks ago and the problem still exists.
After we shut it down, drain ,take it all apart, then put it all together again it will work.
It is on the border of the red on the dewpoint indicator but not completely in the red.
What is the problem and how do I fix it?

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Bill says....

My guess is that you are freezing it up by running it at the maximum for too long. The dryer may be undersized or just at the edge of being undersized, and hot, humid weather would overload it.

Cheers,

Bill

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Does the air drier in compressor need to change?

by kamjoo.soodeh
(kerman,Iran)

I have a 7.5 HP , 750 lit , 2900 r/min air compressor . what's the period that I must change it's air drier ?
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Bill says...

Hello again, kamjoo.soodeh.

The answer is, when the air exiting the drier is no longer as dry as your application demands.

I don't know what type of drier you have, so I don't know the exact refill-change-protocol for your unit.

The purpose of the drier to reduce compressed air-borne vapor and free water to an acceptable level. If yours isn't doing that now, and it did before, then it's time to replace whatever element is drying the air.

Cheers,

Bill

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