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Air compressor drain

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Alvin-Va

08-21-2001 08:11:25

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I put a brass gate valve on the bottom of my air compresor for a drain,seemed like a good idea.
Started to drain it yesterday,the valve came apart in my hand,no damage to me,shorts needed changing anyway,won't need the annual stress test now.Put another one on to get back in business.
Inspection of the valve revealed it had been cracked for some time and decided to let go when I turned it,my guess is it froze and cracked over the winter,have drained it numerous times over several years,never had a problem.
My question,what is a good way to rig a drain that will prevent this from happening again?I am considering plastic (supposedly freeze proof) fittings such as 'Quest'.
Moving the compressor to a heated location is not an option.Daily draining is out,my memory will not support this idea.
Any suggestions will be appreciated.
Thanks

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Al English

08-22-2001 14:04:34

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Re: Air compressor drain in reply to Alvin-Va, 08-21-2001 08:11:25

Hi Alvin,

In my business I have had several each, of two different kinds of automatic drains. Both used a float mechanism to sense the presence of water, and both were self-contained with no outside power needed. Even in an indoor environment, with clean air, both kinds had a tendency to leak air and need frequent service/repair. I finally gave up and replaced them with manual drains. Possibly a different type would be ok, or maybe the same type from a different manufacturer. In any case I suggest you use care to get something that isn't more effort, expense, and aggravation than simply opening the drain periodically...Al English

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Big D

08-22-2001 03:29:09

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Re: Air compressor drain in reply to Alvin-Va, 08-21-2001 08:11:25

Alvin
We have several large and costly machines in our shop.
Last year we had the worst winter since 93. We equiped all our machines with 110-volt automatic cycling drains. You can ajust the cycle from 0 to 30 min. and the drain time from 1 to 15 sec.
In seven years we have not replaced or repaired any air lines or valves.This sounds like what you need. Mc Master carr or Grainger are links to look at. Hope this helps. Big D

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08-21-2001 11:19:19

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Re: Air compressor drain in reply to Alvin-Va, 08-21-2001 08:11:25

Alvin, Harbor Freight (1-800-423-2567) has an automatic drain kit for $10.99 (Item 42221-1HSA). I have thought about ordering one myself since my memory is not what it used to be.

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jeff (tx)

08-21-2001 10:56:16

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Re: Air compressor drain in reply to Alvin-Va, 08-21-2001 08:11:25

wilkerson or watts fluid air makes an automatic tank drain that goes in place of oem drain and you never have to worry about it again. it drains each cycle with a 10 psi differental cost you about 50 bucks but seems like it would be worth it not having to worry about it.
any industrial supply house will have it or can get it. grainger is one of them.

my .02 worth

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Joe

08-21-2001 10:20:45

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Re: Air compressor drain in reply to Alvin-Va, 08-21-2001 08:11:25

I wouldn't use plastic fittings unless you know they will tolerate the oil in the compressor. Replace the brass valve and drain the compressor periodically especially during the cold months like Martha Stewart would do.

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Tyler(WA)

08-21-2001 10:14:18

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Re: Air compressor drain in reply to Alvin-Va, 08-21-2001 08:11:25

My drain has never broken but it freezes everytime I bleed the tank. Even in the summer with 80 degree temperatures, the release of pressure will freeze the condensed water everytime. I was wondering why the bleed valve would plug up, stop and then let go after a long pause. When I looked further, the valve was all frozen and it was ice blocking the air passage. When the ice would melt, the air would continue bleeding off.

I think your valve must have been faulty. You probably won't have the replacement break on you.

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ironrat

09-01-2001 07:12:50

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Re: Re: Air compressor drain in reply to Tyler(WA), 08-21-2001 10:14:18

In very cold weather our comp. would freeze both at the switch relief line and the drain. A heat tape fixed the line and a magnet heater on the bottom of the tank fixed the drain.

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