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TOPIC: Air Compressor Question - Take the pressure down?

Air Compressor Question - Take the pressure down? 3 weeks 16 hours ago #1

  • Flying_Kiwi
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No its not that shit song from John Farnham

I have a compressor with a tank, i have read its not a good idea to keep the airbrush/compressor under pressure.

I turn the compressor off and I purge the tank after a session if i'm walking away for the day. is that a good idea? or can i leave it to leak out over the next X hours??

Lucas

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Air Compressor Question - Take the pressure down? 3 weeks 13 hours ago #2

  • Dave-MA
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I just let mine leak out, which happens fairly quickly as my hose to airbrush connection doesn't want to behave itself these days.

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Air Compressor Question - Take the pressure down? 3 weeks 10 hours ago #3

  • Phil
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I try and remember to drain the water out of my tank when I'm finished.

I don't always do this, even though I should.

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Air Compressor Question - Take the pressure down? 2 weeks 4 days ago #4

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It's not good long term for a tank to be under pressure all the time but the chances of anything happening are very very slim. I always purge my tank when I'm finished, after all it only takes a couple of minutes to refill. I always give tip it to and fro a couple of times while it's purging to get the water out, it's surprising how much comes oout after even one fill.

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Air Compressor Question - Take the pressure down? 2 weeks 4 days ago #5

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I leave mine pressured up, it has a pressure release valve as do most compressors so why worry?
As long as you do a monthly drain and check it should be fine, you don't see industrial compressors drained each day/week or even month.

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Air Compressor Question - Take the pressure down? 2 weeks 4 days ago #6

  • Brian F
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You should purge the line/tank when you have finished as the air that is compressed heats up and then forms condensation in the reservoir and that in turn cause corrosion and water contamination in the paint. Big industrial compressors don't need to be purged as they are equipped with auto blown down valves.

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Air Compressor Question - Take the pressure down? 5 days 10 hours ago #7

  • Jasmckee
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I always empty the tank after I have finished painting, I also leave the drain valve open, I have been told that by leaving the drain valve open it stops condensation forming in the tank as the air temperature changes, where as if it is sealed condensation can build and cause rust to form. The industrial compressors I have been around had auto drains, that would purge the system every day to every few hours. We drain the truck air tanks daily as well. Just my thoughts

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Air Compressor Question - Take the pressure down? 1 day 15 hours ago #8

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I didn’t even know my compressor had a water drain until reading threads like this on the net. As a result, despite being over 15 years old, it was only drained for the first time recently...result, about 10 drops of rusty water.
My setup has a water trap/purge valve that I drain after every use, and I’ve never had any water out of that either (that I’ve noticed)
I bought my compressor from Richard at Modelair in the early 90s, and it’s similar to the “Platinum” ones now on Trade Me For about $300.

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