The regulator seems to be continually slowly bleeding off?

by David

Compressed air regulator with air gauge - http://www.about-air-compressors.com

Compressed air regulator with air gauge - http://www.about-air-compressors.com

I have a setup for moldmaking that includes a paint pressure tank (modified by the manufacturer for mold making) and a small standard compressor.


All seems to be fine with the setup except for one thing... the regulator seems to be continually slowly bleeding off the pressure, which is supposed to remain steady inside the tank.

Basically, I need to fill the tank to a certain pressure and then disconnect the hoses and have it maintain that pressure for the time it takes my material to set.

In this case, the regulator continually releases pressure allowing the tank pressure to drop way too far over a period of time.

I have tried adjusting the knob, but it doesn't seem to make any difference. What am I doing wrong (if anything)? Please help.
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David, if there are no leaks in the system - you can check with soapy water - and you have air bleeding from the regulator relieving port, I surmise that your regulator diaphragm has developed a hole, and air is escaping that way.

It is difficult to find parts for air regulators, unless they are of higher quality industrial type brands. If yours is an industrial air compressor, you may be able to get parts from the regulator source.

If it is an inexpensive regulator you have on your equipment, then I would spend the $20-$30 to buy a new regulator and see if that solves the pressure release problem.

Cheers,

Bill

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Compressor missing a regulator and gauge - installation?

by Doug cooper
(Des Moines, Ia.)

Compressed air regulator with air gauge - http://www.about-air-compressors.com

Compressed air regulator with air gauge - http://www.about-air-compressors.com

I have a compressor that is missing a regulator and gauge

I need to know where and how ( in relation to the tank pressure gauge) to install one
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Doug, I have to assume that you are writing about a DIY home air compressor, since you do not identify the brand or the model?

When you acquire a new regulator, typically it will come with the regulator gauge, and that gauge will thread into one of two ports on the regulator body. The choice of ports is determined by the orientation of the regulator. The gauge in put into the port that you can see when the regulator is installed.

The air exits the tank on a pipe, and typically, the first thing in the pipe running from the tank to the discharge coupler is the regulator.

Ideally, though, you would install a filter first, then the regulator. The filter helps keep tank water and debris out of the regulator. Most low cost DIY air compressors do not have a filter though.

As to what type of regulator, if your compressor is a small one, a miniature regulator will do, though it were me I would opt for a normal size regulator with ports sizes that fit the pipe size, just to ensure that the regulator isn't a choke point in my air flow.

For a small compressor, this is less critical, as their discharge flow is relatively small anyway, and a mini-regulator will do.

A general purpose air regulator, with a pressure adjustment range of 0-150 will normally do nicely. You can likely acquire one from one of the advertisers on my Regulator page, or, most shops that sell air compressors offer regulators too.

When you visit the shop, have a look at the compressors they sell, and you'll quickly see where the regulator is installed on the new compressors, as an additional guide for you.

Cheers,

Bill

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Regulator at Paint sprayer

by Larry Cooley
(Wheatfield,In.)

Hi Bill,
Regulator leaks air through the relief hole continually? It was only used once.
Thanks, Larry
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Howdy Larry...

If air is leaking out of the regulator relief hole all the time there is air in the compressor tank, the typical suspects would be a regulator that is installed backwards, or the diaphragm in the regulator has a hole in it.

Cheers,

Bill

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Apr 14, 2013
Leaking Mini-Regulator
by: Larry

Hi Bill, Regulator installed properly. Took it apart and found diaphragm was ok, but I found a split ring keeper had fell off(I assume) the shaft. I left keeper out and reassembled but still leaks? I can't understand what role the keeper plays.
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Larry, not sure either, though I suspect it has to do with the non-rising knob.

I guess the keeper was broken, or you would have reinstalled it?

A new regulator is about $15-$20, at they, unfortunately (at least the DIY type compressor regulators) are not supported as to repairs. They are presumed to be a consumable, as I suspect yours is now.

Bill

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air pressure increase?

by Lynn
(monroe, nc)

Bill,
If an air compressor is set at 90psi at one end of a facility, how can a regulator at the opposite end of the facility read 120psi? (The piping does reduce in size several times)
Thanks
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Hi Lynn.. the answer is that it cannot. A regulator cannot increase the pressure higher than supply pressure to that regulator.

So, either the upstream regulator or the regulator gauge has failed, and it is passing 120 PSI air into the line, or the regulator that is reading 120 PSI, downstream from the regulator set for 90 PSI, has a failed gauge is not working.

Cheers,

Bill


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