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Air Compressor Line Dryer #5395407 04/06/20 11:48 AM
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The Critic Offline OP
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I recently purchased an air compressor and noticed that the air coming out of it is somewhat moist.

I am using a 25’ air hose that connects directly to the compressor. What are my options for drying the air that comes out of it?

It is a 25-gal oiled compressor. I will be using the air for tires and impact wrenches.

Thanks.


2011 Toyota Prius 1.8L - 207K - Valvoline Premium Blue Restore 10W-30
2007 Honda Accord 2.4L - 146K - Valvoline Premium Blue Restore 10W-30
Re: Air Compressor Line Dryer [Re: The Critic] #5395414 04/06/20 11:53 AM
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Donald Offline
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Well if you have the money then a refrigerated air dryer is the best. Otherwise an inline filter or dryer should handle it. If you use oil then you will be fine without any dryer.


2015 Ford F-250 w/Powerstroke
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Re: Air Compressor Line Dryer [Re: Donald] #5395418 04/06/20 11:56 AM
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The Critic Offline OP
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Originally Posted by Donald
Well if you have the money then a refrigerated air dryer is the best. Otherwise an inline filter or dryer should handle it. If you use oil then you will be fine without any dryer.

I do oil my guns, but moist air being used for tire inflation is definitely a downside.

I don’t have the space for a refrigerated air dryer.

Is it worth buying this type of unit?
https://m.northerntool.com/shop/tools/product_200392582_200392582


2011 Toyota Prius 1.8L - 207K - Valvoline Premium Blue Restore 10W-30
2007 Honda Accord 2.4L - 146K - Valvoline Premium Blue Restore 10W-30
Re: Air Compressor Line Dryer [Re: The Critic] #5395422 04/06/20 12:00 PM
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cpayne5 Offline
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If it were me, I wouldn't worry about drying the air if just using to inflate tires and pneumatic tools.

A cheap inline desiccant dryer may be a good option for you if you want to go that route. HF has one for $7, but I've never used it so I can't comment on how well it works.

Good luck!

Re: Air Compressor Line Dryer [Re: The Critic] #5395471 04/06/20 01:05 PM
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ragtoplvr Offline
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The old school solution for an air filter drier is to take a 6 inch piece of 1" black pipe and a couple of 1" to 1/2" bell reducers. Then you put a couple of ladies tampons in it. We used to make the new guy go buy them. they absorb any liquid and are very inexpensive. Replace often. Do not let sit with wet ones in it, the pipe will rust.

Rod

Last edited by ragtoplvr; 04/06/20 01:06 PM.
Re: Air Compressor Line Dryer [Re: The Critic] #5395511 04/06/20 01:46 PM
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JHZR2 Offline
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Ive seen units that have dessicant in them. Id think that might be more effective than something that just lets it drop out. But as a sporadic user, id probably put it inline via fittings, and put dual ball valves on it to keep it closed out when not in use - so moisture doesnt diffuse in.

Re: Air Compressor Line Dryer [Re: The Critic] #5395610 04/06/20 03:37 PM
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dave123 Offline
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Tip +1 do not connect hose directly to tank for end use
Get filter and regulator as far from tank as possible.

Re: Air Compressor Line Dryer [Re: The Critic] #5395672 04/06/20 04:47 PM
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Traction Offline
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The longer the run, the cooler, and dryer the air. Before I bought a refrigerated air dryer that drops it to like 38 degrees, I used a 25 foot coil of 1/2in copper tubing with a fan blowing across it. Most of my air lines are copper to shed heat. Also, HUGE hint is to always drain the compressor before you fire it up. Otherwise the compressed air will heat up the water in the bottom, and vaporize it.

Last edited by Traction; 04/06/20 04:49 PM.

Certified Tire Service Instructor since 2009
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Re: Air Compressor Line Dryer [Re: The Critic] #5395686 04/06/20 05:04 PM
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Chris142 Offline
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Last edited by Chris142; 04/06/20 05:04 PM.

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Re: Air Compressor Line Dryer [Re: Traction] #5395721 04/06/20 05:49 PM
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CT8 Offline
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Originally Posted by The Critic
Originally Posted by Donald
Well if you have the money then a refrigerated air dryer is the best. Otherwise an inline filter or dryer should handle it. If you use oil then you will be fine without any dryer.

I do oil my guns, but moist air being used for tire inflation is definitely a downside.

I don’t have the space for a refrigerated air dryer.

Is it worth buying this type of unit?
https://m.northerntool.com/shop/tools/product_200392582_200392582

The farther from the compressor you mount the separator the better.
Originally Posted by Traction
The longer the run, the cooler, and dryer the air. Before I bought a refrigerated air dryer that drops it to like 38 degrees, I used a 25 foot coil of 1/2in copper tubing with a fan blowing across it. Most of my air lines are copper to shed heat. Also, HUGE hint is to always drain the compressor before you fire it up. Otherwise the compressed air will heat up the water in the bottom, and vaporize it.
This post nails it.


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Re: Air Compressor Line Dryer [Re: The Critic] #5395766 04/06/20 06:32 PM
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Tman220 Offline
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[Linked Image]
You need to put one of these bad boys between the compressor and storage tank. Mount behind compressor fan/pulley so air is drawn across it. Then add a large filter with a drain at a low point before going to the storage tank. This will remove 90% of the moisture before the air even reaches the storage tank. A little spendy, but you will spend time and money on anything to be effective.


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Re: Air Compressor Line Dryer [Re: The Critic] #5395859 04/06/20 08:18 PM
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P10crew Offline
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[Linked Image]
You can also make one for the price of the copper.

Re: Air Compressor Line Dryer [Re: P10crew] #5396609 04/07/20 04:12 PM
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The Critic Offline OP
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Originally Posted by Tman220
[Linked Image]
You need to put one of these bad boys between the compressor and storage tank. Mount behind compressor fan/pulley so air is drawn across it. Then add a large filter with a drain at a low point before going to the storage tank. This will remove 90% of the moisture before the air even reaches the storage tank. A little spendy, but you will spend time and money on anything to be effective.

Originally Posted by P10crew
[Linked Image]
You can also make one for the price of the copper.

Thanks guys, these would be perfect.

Do you have a link to a commercially available one?


2011 Toyota Prius 1.8L - 207K - Valvoline Premium Blue Restore 10W-30
2007 Honda Accord 2.4L - 146K - Valvoline Premium Blue Restore 10W-30
Re: Air Compressor Line Dryer [Re: The Critic] #5397052 04/08/20 06:43 AM
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NYEngineer Offline
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Many years ago I was painting a car for myself on a very hot humid day. Even with a separator I was getting droplets. I filled a five gallon pail with ice water and stacked stuff up so the water was surrounding the dryer. After that, no more droplets in my paint.

Re: Air Compressor Line Dryer [Re: The Critic] #5397414 04/08/20 01:23 PM
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Tman220 Offline
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2012 Regal GS Turbo PP 5w30 90k
1994 Camaro Z28 LT1 355 CI, 430 RWHP PP 5W30 165k
2005 GMC Sierra 1500 5.3 170k
2004 Civic LX M5 190k
2007 Camry 2.4 250k
2016 Victory Vegas
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