Airtanks and airbrushing

jboutin

Member since
December 2004
From: 288921 E, 5659868 N UTMz12, NAD83

Airtanks and airbrushing

Posted by jboutin on Wednesday, February 2, 2005 2:47 PM

I have an airtank and I have a problem with airpressure. I hope some others out there use a tank too and can help me.

The problem is that the airpressure is really high coming out of the tank. I have a regulartor but it only helps somewhat. I fill the tank to 100psi. I set the regulator and when I press the trigger on my airbrush (paasche H), I get a burst of really high pressure that reduces quickly to what the regulator is set to but I can't seem to set my regulator to lower than 30psi. Once I stop pressing the trigger, the pressure goes way back up so each time I have to bleed off the pressure. Does anyone know of a regulator or system that prevents the big burst of high pressure each time I start airbrushing? I want to be able to press the trigger and have 20-30psi right away.

JAY - fighting evil since 2:15pm, July 8,1976 -

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MusicCity

Member since
January 2004
From: USA

Posted by MusicCity on Wednesday, February 2, 2005 3:09 PM

Don't know what kind of regulator you have, but mine doesn't behave like that. My compressor fills the tank at 140 psi. I set the regulator to whatever I want (usually 15 psi or less) and that's what I get when I press the trigger.

My regulator came from Lowes and cost about $20. Can't remember the brand name, but it's just a plain old nothing-special regulator.

Scott Craig -- Nashville, TN -- My Website -- My Models Page

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jdavidb

Member since
August 2004
From: Kennesaw, GA

Posted by jdavidb on Wednesday, February 2, 2005 9:49 PM

It sounds like something is expanding and pressurizing while the trigger is off. Maybe your airbrush air hose has become too weak / too flexible. If it's not that, maybe it's the moisture trap shell that is containing backed up pressure.

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jboutin

Member since
December 2004
From: 288921 E, 5659868 N UTMz12, NAD83

Posted by jboutin on Thursday, February 3, 2005 1:24 PM

I don't have a moisture trap. All I have is the tank, the guage for the tank, the regulator is attached after the guage and my airbrush hose is attached to the out end of the regulator. It seems like the regulator is allowing the pressure from the tank into the airhose when the trigger is off. Grumpy [|(]

JAY - fighting evil since 2:15pm, July 8,1976 -

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Anonymous

Member since
November 2005

Posted by Anonymous on Thursday, February 3, 2005 3:14 PM

I think Jdavid is right about the hose, your airbrush is charged with pressure all the way to the trigger, as it should be but how old is the hose?? is it rubber with a braided covering or one of the plastic ones??? also How long is the hose line ? Long hoses build up more pressure in them than short ones do.

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jboutin

Member since
December 2004
From: 288921 E, 5659868 N UTMz12, NAD83

Posted by jboutin on Thursday, February 3, 2005 3:23 PM

My hose is 12 years old? it is rubber with a braided covering. I don't see how it could be the hose as when I open the valve on the airtank to let pressure into the regulator, the air goes right through the regulator and pressurizes everything at what ever the tank's pressure is.

JAY - fighting evil since 2:15pm, July 8,1976 -

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jdavidb

Member since
August 2004
From: Kennesaw, GA

Posted by jdavidb on Thursday, February 3, 2005 5:08 PM

If there hasn't been a moisture trap on it for 12 years, the air hose has likely experienced water damage on its rubber inside. It might not be the air hose anyway though. Take the airhose off & see if the regulator really is controlling pressure. Turn it all the way down, remove the air hose from its outlet, there should be no air. Gradually turn its dial up & make sure it's regulating. You should be able to make the air stop coming from its outlet with a finger.

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f-4phantom

Member since
October 2003
From: Mpls., Mn.

Posted by f-4phantom on Thursday, February 3, 2005 5:20 PM

IMHO your regulator seems suspect. It's not regulating the air pressure.

Dean

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jboutin

Member since
December 2004
From: 288921 E, 5659868 N UTMz12, NAD83

Posted by jboutin on Monday, February 7, 2005 1:45 PM

Thanks guys, it turned out it was the regulator, something was wrong with it so I returned it and got another one, this one works fine.

JAY - fighting evil since 2:15pm, July 8,1976 -

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MikeV

Member since
April 2003
From: Hayward, CA

Posted by MikeV on Monday, February 7, 2005 8:37 PM

That's good news Jay. Big Smile [:D]

Mike

“Wisdom is the right use of knowledge. To know is not to be wise. Many men know a great deal, and are all the greater fools for it. There is no fool so great a fool as a knowing fool. But to know how to use knowledge is to have wisdom. " Charles Spurgeon

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Anonymous

Member since
November 2005

Posted by Anonymous on Tuesday, February 8, 2005 1:46 PM

I'm betting you got an air regulator, not a pressure regulator...common mistake. The air regulator is just a constricting device, so the air source will eventually pressurize the line to whatever the pressure in the tank is. Kinda hard to describe. The pressure regulator regulates the pressure of the air, but not the volume.

Dan

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jboutin

Member since
December 2004
From: 288921 E, 5659868 N UTMz12, NAD83

Posted by jboutin on Tuesday, February 8, 2005 6:12 PM

You know what, that is exacatly what I got, , You really don't have to decscribe it I know what happens. I'll look into pressure regulators.

JAY - fighting evil since 2:15pm, July 8,1976 -

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