150 lbs in tank and. no air comes out of the hose

by john
(pgh pa)

tank fills with air 150 lbs. no air comes out of the hose regulator reads 0


need help
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Well, the first question John is what happens when you turn the knob on the regulator.

If the tank gauge says 150 PSI and the regulator gauge reads 0 PSI, then it is possible that someone has turned the regulator setting down to zero, and that effectively shuts of the air flow.

Comment here with your findings, please.

Bill

Comments for 150 lbs in tank and. no air comes out of the hose

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Jul 22, 2013
No air pressure after turning regulator knob
by: Anonymous

Turned the adjustment knob nothing happens regulator gauge reads zero
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Sometimes you need to push down on the regulator adjusting knob, or pull it out.

Assuming you have done that and you still get no change in the regulator gauge, and assuming that the tank gauge is working and you actually have 150 PSI in the tank, then either the regulator gauge itself is faulty, or the regulator has been dialed shut, and turning the adjustment knob does not open the regulator to flow.

The original question referred to no air out of hose. What happens if you plug just a connector (no hose attached) into the discharge coupler? If not air blows out (and be careful as the connector might fly out if you don't hold it tightly) then that is a pretty good sign that the regulator is pooched an it's time for a new one.

Bill


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why does my regulator leak

by Robert
(Winchendon, MA)

I have replaced my regulator on my air compressor twice and I am still having the same problem. I have model # Groo45.
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I was unable to obtain any information about your air regulator model Groo45.

If the downstream air pressure is higher than the upstream air pressure, the regulator is designed to relieve the downstream pressure to equalize it with the upstream, and that equalization means air blows out of the relieving port of the regulator.

The other reason why an air regulator leaks continually, as long as there is air in the tank, is because the regulator has been installed backwards... meaning the air is flowing the wrong way.

It's odd to have multiple regulators all leaking.

Bill

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Cannot seem to adjust regulator

by Steve
(Wiggins, Ms)

I have a Central Pneumatic 94355 8 gallon air compressor. It's been used very, very little. It cuts on and fills then stops. The tank pressure gauge reads 120psi but the outflow gauge reads 0. When I attempt to adjust regulator pressure knob (which has a "-" to the left and a "+" to the right) I push down to engage the knob at which point pressure on the ouflow gauge reads anywhere from 40-80psi but as soon as I release the knob there is a "hiss" of air and the pressure drops back to 0. I have done this with both the airline attached and detached with the same result. It seems to me that the regulator adjustment knob is broken. Any help would be greatly appreciated.
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Steve, did you ever have a reason to remove and replace the regulator?

The symptoms you describe can be attributed to a regulator that is installed backwards.

Please look closely at your regulator and see if you can spot an arrow on the body of it. When you do, is the arrow pointing from the tank side and towards the discharge coupler?

If the regulator is installed correctly, then I'm guessing your regulator is pooched.

Cheers,

Bill

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air regulator

by carl
(philippines)

Miniature filter regulator combination (Photo: Amazon.com)

Miniature filter regulator combination (Photo: Amazon.com)

Good Day, i have a pressure regulator with moisture trap, the problem is every time i adjust decrease the pressure to 20psi,it continues the hissing sound and continue releases air? i cannot use the regulator if i need 10psi or lower. But when above 20psi there is no problem. Do you think i need to replace it, or i can still fix the problem??? Thanks :)
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Hi Carl... what you have is a relieving regulator. This means that if the downstream air pressure (the air pressure in the line supplying your air tool or equipment) is higher than the pressure setting you are dialing the regulator to, then all the air pressure that is downstream and higher than the new setting will have to vent out the regulator vent hole to allow the downstream pressure to match the regulator setting.

If you have a lot of hose or pipe downstream, and the pressure variance between the existing pressure in that hose is high, it may take quite a while for the two pressures to stabilize by the venting.

When you dial below 10 PSI, are you saying that the venting never stops, or just runs a long time.

Another factor may be the accuracy of the gauge and the regulator itself. Low cost F/R's are notorious for pressure variances. You are dialing down to 10 PSI, but the difference between the setting and the actual pressure may be as high as 5 PSI. Also, the gauge has some variance too.

You might think you are dialing down 10 PSI, but it is possible that you are almost closing the regulator at that setting, and that would force venting of air as long as there was any air in the downstream air hose.

If you want accurate pressure setting in a regulator you need to use a precision regulator with a +/- of a fraction of a PSI, not a general purpose regulator with a +/- of up to 5 PSI, or maybe more if it's well used and getting cruddy.

Does this help at all?

Cheers,

Bill

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