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Low psi in reserve tank on a dewalt air compressure

LOW AIR PRESSURE IN TANK

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  • Anonymous Apr 22, 2009

    will not keep air will not stop

  • Treknflip23 May 11, 2010

    Is air escaping from any where that you can hear or see?

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This is a fairly common problem in small pancake compressors. I would start by making sure no air is escaping from the condensation drain valve on the bottom of the tank.

Next Pump it up as much as it will hold and turn it off. Listen for air leaks around the fitting on the bottom of the regulator that screws into the tank. These really need teflon tape and to be screwed in well.

Next check the regulator itself. These are rather inexpensive and don't last long when the compressor is used a lot. Also it doesn't take much of a bang when jostled around.

Is the regulator for tank pressure set correctly? Thump the glass covering the dial with your finger. Sometimes it sticks and you'll think it's set correctly when it isn't.

Lastly, check each connection for tightness with teflon tape. If all looks good, gamble about $20 on a new regulator. Odds are that's where the problem lies. This has happened to me a few times.

Posted on May 12, 2009

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MT 600101 oil-less compressor, pdf manual. I specifically would like to know the scfm ratings at 40 and 90 psi.


the air flow from a compressor is determined by the capacity of the pumping system
with a piston type compressor it is the bore by the stroke
in a diaphragm type is it is the diaphragm dia by the stroke
that is the maximum cubic feet of air a minute produced
pressure is the resistance to flow so regardless of the pressure or restriction it will only produce that set air flow at that rpms
do not confuse the flow with pressure as it works like this the greater the restriction the greater the pressure in reserve but the less flow in cubic ft per minute through the restriction
for example a compressor producing 10 cubic feet per minute does that with not restriction but with no pressure
at 25% restriction to air flow the pressure in the tank will now rise to say 25 psi and the flow from the restriction will drop to 8 cubic feet per minute
at 50% restriction the compressor is still putting out 10 cubic feet of air per minute but the tank pressure has risen to 50 psi and the flow from the restriction has dropped to 4 cubic ft per minute
go to the extreme end and the compressor is still producing 10 cubic ft of air per minute , the restriction now allows 100 psi in the tank but the low from the restriction has been reduced to 2 cubic ft per minute
the simple equation is pressure = flow X resistance

Jun 24, 2017 | Air Tools & Compressors

1 Answer

WX-203 146S30, 32 Gal WELL-X-TROL Well Tank Stand low pressure upstairs


There is a schraeder valve at the top of the tank. Check the air pressure with a tire gauge. It should be two psi lower that the cut in pressure. eg: If you have a 40/60 pressure switch, the tank should read 38 psi.If it is lower, charge it up with air. If it loses the air again, the tank needs to be replaced. The gauge at the tank is rarely accurate so I would an outside sillcock pressure gauge to determine your system pressure so you can set the tank pressure properly. Good luck!

Apr 25, 2017 | Water Heaters

1 Answer

Dewalt Emglo 55168 motor starts to slow down as pressure builds to about 30 PSI. It really starts to labor. Any thoughts as to what could be causing the motor to strain and slow?


Most likely in tank check valve is leaking or belt is slipping. Belt tension easy to check, should not deflect with thumb pressure. Check valve should not let air escape out of tank. Easy to check. Run compressor till pressure builds to around 50 psi. Then unplug machine from power outlet. Listen for air leaking out of tank. In bad cases, air will actually leak out of intake filter. Replace check valve as needed. Good luck

Oct 26, 2016 | Dewalt Air Tools & Compressors

1 Answer

I have a Dewalt model D55166. It will not shut off when it reaches the maximum allowed air pressure. What could cause this?


If safety pressure release valve pops open then electric pressure switch is bad, however if compressure keeps running and never pops safety valve then most likely tubing / joint leaks or cylinder / ring worn out. Spray soapy water on all joints and drain valve , if no leaks suspect cylinder. Good luck

Feb 23, 2015 | Dewalt Air Tools & Compressors

1 Answer

Pump not holding presure


If you have a bladder - type water pressure tank, it probably needs to be purged of air and then pre-charged to 18 psi. There may be directions on the side of the tank. Turn the water Pump off. Drain the tank of water. Check the pressure of the tank at the air valve on top of the tank. The pre-charged pressure of the bladder is set to 2 psi below the lower pressure set by the pressure switch, so in your case, the low end pressure is 20 psi. Therefore, the pre-charge pressure of the tank is 18 psi. If you set the pressure switch to operate at 30 -50 psi, then the pre-charge pressure would be 28psi., etc. Once the pre-charge pressure is set, turn the pump back on. ( don't forget to close the drain valve). The system should cycle normally. A tire gauge works to check the tank pressure. An air compressor may be used to charge the tank, but be careful not to over- inflate the bladder. A tire air pump may also be used. Hope this helps....

Apr 06, 2014 | Utilitech Plumbing

1 Answer

My 1/2 hp mastercraft pump cycles ever 3 seconds roughly. The pressure switch is set at 40-60psi. Should I replace or upgrade my pressure tank?


You might want to make sure you have proper air volume in pressure tank.


Shut down system. Drain tank. Fill tank with air via Shrader valve on top of tank until it has a few less psi than the low cut off setting. This will ensure that the tank still has water in it with some pressure still pushing it out when the pump kicks back on.


Without that cushion of air, the pump short cycles. ie every 3 seconds.....


http://www.pumpsandtanks.com/faq_page.htm#air

Aug 12, 2012 | Plumbing

1 Answer

Dewalt air compressor keeps running until pressure output is 200 PSI, the same pressure in the tank. Why doesn't it quit running at 120 PSI the designated pressure on the compressor?


The regulator switch/unloader is bad or out of adjustment. Perhaps though the gauge is faulty. 200 psi in a 120psi compressor is dangerous, don't run it until it is fixed!

Dec 15, 2010 | Dewalt Air Tools & Compressors

1 Answer

When adding air to a pressure water pump ,i


Sounds like the bladder is gone or inproper air pressure in water storage tank.

Bladder goes bad check it out with step 1
1-
One way to check for sure with everything hooked up. The air valve on top of the tank if pressed you will get water out of the valve which should be only air. This will let you know it should replaced.

If Tank bladder is low in air and not water coming out.

2-If it checks ok put an air gauge to tank to check the air pressure, with a standard 40 gal tank you will have 28 psi of air in tank for it to function properly.

May 21, 2010 | Plumbing

2 Answers

HOW MANY CFM DOES THIS COMPRESSER DELIVER AT 100 PSI


If this is the compressor the amount is 16.2 at 100PSI. PLease see attached link:

http://www.toolfetch.com/p-d55275.shtml

I hope this may have helped,
Tom

Oct 16, 2009 | Dewalt D55275 8 Hp Gas - Powered 17 -...

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