pressure (cut in) adjustment.

I run a mobile service. my compressor holds 120 lbs. when it drops to 90 it kicks back on. I want it to drop to 50 lbs before it kicks on. how do i adjust


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Bill says...

Ed, the thing that controls the air compressor cut in pressure is the pressure switch. It also controls the compressor cut out pressure level too.

I'm puzzled as to why you feel the need to reduce the cut in pressure to 50 PSI?

Wouldn't the same thing be accomplished by turning your regulator down to 50 PSI or below? Regardless of the pressure in the compressor tank, your applications would then only see 50 PSI, would use less air because of the lower pressure setting, and thus would reduce the frequency of compressor cut in.

If you must change your pressure settings, and I generally advise against it, as they are factory set for good reason, then one of the two threaded shafts with the nuts pushing down on springs inside your compressor pressure switch will adjust the cut in and the other will adjust the compressor cut out pressure levels.

Cheers,

Bill

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dont know how to adjust hi lo pressure on off switch

do you know how to adjust hi lo press switch

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Bill says...

See the the PRESSURE SWITCH page on this site, for more information about the operation of your compressor pressure switch!

You might also second guess changing the factory pressure settings on the compressor supplied switch, as they are set at those levels for a reason.

Cheers,

Bill

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want to adjust regulator - will not come back on until it reaches 50psi

Bought used montgomery ward brand air compressor. Pressure builds fine to 100psi and shuts down.

Problem is when useing finish nailer compressor will not come back on until it reaches 50psi, which is not enough pressure to run gun. is their a adjustment i can make on compresser. i also have inline reg set at 80psi.
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Bill says...

You can adjust your pressure regulator to your heart's content, but, the regulator can not increase the air pressure to your air tool higher than the air pressure coming into it from the tank.

So, to answer your question, the cut in and cut out pressure settings for your air compressor are the work of the pressure switch.

Both your cut out and cut in pressure levels for your air compressor seem low to me. I don't know what the original settings were though, so I cannot be sure.

See the Pressure Switch pages for info on adjusting them.

Cheers,

Bill

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how can I adjust to higher setting to kick on

when my air compressor kicks off the air pressure is too low. How can I adjust to highersettng to kick on
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The pressure switch contains the adjustments for cut in and cut out.

When you remove the cover, look for a schematic under the lid.

I have no idea what make of switch or compressor you have as you don't say, so being specific is difficult for me or any other reader.

Cheers,

Bill


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How do i set the cut-off and cut-on levels?

I have a new nail gun and it works fine as long as i have at least 90psi but after a few shoots it will not drive the nails all the way in. the psi is below 90 but my tank prussure is like 120 the compressor will not cut-on i like to run my gun at 100psi and my tank at 120 or 130 psi how do i set the cut-on and cut off levels so that i can keep enough prussure to operate the gun. the cover over has two set screws one affects both the cut-on and cut-off levels and the other only affects the cut-off level. help!!!

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I need to increase the cut in pressure

by Mark Rose
(Fareham Hampshire UK)

My compressor has 150ltr tank and has a max operating pressure of 10bar so it charges to 8 bar and cuts out and then cuts in when it gets down to 4 bar

I am running a Laser cable printing machine which requires a 5 bar supply.

my problemis when the pressure drops below 5 bar the laser machine stops until the pressure is above 5 bar so I have a period where I have to either bleed the system so as to get the copmessor to cut in and re-charge.

Is there anyway I can increase the cutin pressure to 5 bar?

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Bill says...

Yes, there is. It's done by adjusting the cut in and cut out pressures from inside the pressure switch.

The downside is that your air compressor has been set up to run correctly at the pressures the pressure switch is currently set at.

By adjusting those settings, you run the risk of changing the life expectancy of your air compressor.

See the PRESSURE SWITCH page for more info.

Cheers,

Bill

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