Air compressor question, Draining the water, but leaving it pressurized overnight |
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Air compressor question, Draining the water, but leaving it pressurized overnight |
VaccaRabite |
Jul 18 2007, 02:05 PM
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#1
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En Garde! Group: Admin Posts: 13,554 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I have a question about my air compressor.
Lately I have been turning it off when I am done working, then draining the water out via the drain plug. But once the water was out, I was leaving it pressurized for the next day. I figure that is less wear and tear then having to re-pressurize the tank every day that you need to do work, and would save time if you needed air for some other task (like charging a bike tire before going riding). if the tank was fully pressurized before I turn the compressor off, it could have ~100 psi of air after draining the water out of the bottom of the tank. Is this harmfull? I am taking the pressure out of the hose and setting my regulator for 0 PSI, so I don't think it would strain the regulator. Am I wrong here? Zach |
McMark |
Jul 18 2007, 02:08 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
Most people I know leave them pressurized and rarely drain them. So I think you're ahead of the game regardless.
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sww914 |
Jul 18 2007, 03:19 PM
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#3
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Advanced Member Group: Members Posts: 2,439 Joined: 4-June 06 Member No.: 6,146 Region Association: None |
I drain mine at least once a year. I've never intentionally depressurized it except to move it. All that air weighs quite a bit.
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Johny Blackstain |
Jul 18 2007, 04:17 PM
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#4
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Walnut Elite Stratocaster player Group: Members Posts: 3,434 Joined: 5-December 06 From: The Shenandoah River Member No.: 7,318 Region Association: MidAtlantic Region |
Actually, sounds like a pretty good way to test your tank for leaks. Also sounds like what your doing & the way your doing it isn't going to hurt anything.
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VaccaRabite |
Jul 18 2007, 04:23 PM
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#5
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En Garde! Group: Admin Posts: 13,554 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
I drain mine at least once a year. I've never intentionally depressurized it except to move it. All that air weighs quite a bit. Well, mine is bolted to the floor, so it won't be moving anywhere. Thanks all. I am thinking I will be fine. I just wanted to know what other folks did. For the guys that don't drain the tanks, arn't you worried about rust weakening the tank, causing an eventual tank blowout? Granted, the MidAtlantic is pretty humid, but there is a significant amount of water in mine after just one afternoon of work. Zach |
rhodyguy |
Jul 18 2007, 04:32 PM
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#6
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Chimp Sanctuary NW. Check it out. Group: Members Posts: 22,188 Joined: 2-March 03 From: Orion's Bell. The BELL! Member No.: 378 Region Association: Galt's Gulch |
when you release the air draining it and represurize it, you fill it back up with moist air. which will condense and form water...again. when done for the day, drain it and close the petcock the next time you use it. under constant use on a job site they cycle up alot.
k |
zymurgist |
Jul 18 2007, 05:34 PM
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#7
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"Ace" Mechanic Group: Members Posts: 7,411 Joined: 9-June 05 From: Hagerstown, MD Member No.: 4,238 Region Association: None |
I've had mine for 6 years or so and rarely if ever drain it. The way I see it, it's got these big iron fittings on the bottom of the tank. If those ever rust through, it's time to go back to Home Depot. Besides, I think the compressor will wear out before the tank does.
When I do drain it, it's usually because I've been doing lots of sandblasting (heavy usage). |
SLITS |
Jul 18 2007, 05:51 PM
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#8
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None |
The entrained moisture laden air kills your air tools. We used to drain once per week in the hot humid summer ... slightly less in the winter. Also, we did a daily injection of oil to protect the tools.
Now, we have a refrigeration system on the output to remove the moisture. |
Air_Cooled_Nut |
Jul 18 2007, 09:25 PM
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#9
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914 Ronin - 914 owner who lost his 914club.com Group: Members Posts: 1,748 Joined: 19-April 03 From: Beaverton, Oregon Member No.: 584 Region Association: None |
My 60-gallon Craftsman says drain the air from it every day. Mine has a petcock at the very bottom center of the tank that is used to drain the last 20psi and water from the tank. I try to do this every day and even low-humidity days (inland west coast) I still get water draining/dribbling from the tank.
I would venture a guess that summer in the southwest or winter in the north (where the temp is below freezing) are the only times you won't have to worry about moisture in the air condensing in the tank (IMG:style_emoticons/default/wink.gif) I put three drops of air tool oil in my tools every day I use them. Habit I picked up during community automotive classes at the community college. |
zymurgist |
Jul 19 2007, 10:27 AM
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#10
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"Ace" Mechanic Group: Members Posts: 7,411 Joined: 9-June 05 From: Hagerstown, MD Member No.: 4,238 Region Association: None |
The entrained moisture laden air kills your air tools. We used to drain once per week in the hot humid summer ... slightly less in the winter. Also, we did a daily injection of oil to protect the tools. I dribble oil into my expensive IR impact wrench. The rest of my air tools are Harbor Freight specials so if they break, I will toss them in the trash and replace them. Funny, none of them have broken yet... probably because they don't see the usage that they would in a professional shop. |
bondo |
Jul 19 2007, 11:02 AM
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#11
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Practicing my perpendicular parking Group: Members Posts: 4,277 Joined: 19-April 03 From: Los Osos, CA Member No.: 587 Region Association: Central California |
I picked up an automatic compressor drain kit from harbor freight. It drains water from the tank every time the compressor shuts off. Of course I haven't gotten around to installing it yet, so I can't tell you how well it works. (IMG:style_emoticons/default/smile.gif)
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