Yet another pneumatic question
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Fleet Owner
Joined: Mar 2003
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From: Blue Hill Township
Yet another pneumatic question
I have yet another pneumatic related question for you guys. Why do manufacturers recommend 90psi with air tools? What happens when you run them at 120 or 130psi?
Posting Legend
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90 PSI is the pressure that they are rated at for torque/speed/etc because that pressure is normally available with pressure drops thru the lines and fittings. Higher pressure will not harm them but it may make them turn faster etc. Industrial machines are usually designed to operate properly with as little as 70 PSI as a rule.
Postmaster
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From: wi
ive got mine set to shut off at 160 come on at 140 and it does shorten the life span of air tools runnin that much psi i also use 3/4inch hose for valume. i dont like to sit there and listen to the big gun hammer(1"drive) to much while takin of semi wheels,even the 1/2inch will blow the studs off the pickup if your not carefull but at least there tight
Posting Guru
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From: Sapulpa OK
At 130 PSI you can get 50% more work done. A Dual Action sander for example will get the job done much faster at the higher pressure. On the other hand wear goes up as well as the cost to compress that air.
On many applications the many pipe fittings, quick couplings and long lenghts of hose all present pressure drops to the system and by the time your 130 PSI gets to the tool you have only 90 PSI left.
Like most things in life, there are trade offs and you have to consider all aspects.
Steve
On many applications the many pipe fittings, quick couplings and long lenghts of hose all present pressure drops to the system and by the time your 130 PSI gets to the tool you have only 90 PSI left.
Like most things in life, there are trade offs and you have to consider all aspects.
Steve
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From: Florida Hill Country
Originally Posted by wizzard351
ive got mine set to shut off at 160 come on at 140 and it does shorten the life span of air tools runnin that much psi i also use 3/4inch hose for valume. i dont like to sit there and listen to the big gun hammer(1"drive) to much while takin of semi wheels,even the 1/2inch will blow the studs off the pickup if your not carefull but at least there tight
Aren't you running a pressure regulator? My tank shuts of at 175 psi but I have regulators for tools. I have a branch with no regulator for airing up tires.I adjust it to where I get 100 psi at the tool which is about 108 on the main regulator.
Postmaster
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From: wi
yeah i have a regulater and have it set wide open.the theres a water seperater rite after that.i was suprized that it did blow the glass/plastic bulb off the sep.i also use this comp.for sand blasting my gauge will never read below 100.sand cost to much here to go over somthing twice
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Posting Legend
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Compressing air to a high pressure then reducing that pressure with a regulator wastes energy. Dual selectable pressure switches may be a better option.
If you need highly regulated air for some tool or operation a pressure regulator and a pressure switch adjusted for the demand is a good setup.
Most shop tools do not require regulated air pressure. Painting etc does require pressure regulation.
A regulator adjusted "wide open" is doing nothing and should be removed.
A properly designed and sized receiver tank is the major water removal device.
If you need highly regulated air for some tool or operation a pressure regulator and a pressure switch adjusted for the demand is a good setup.
Most shop tools do not require regulated air pressure. Painting etc does require pressure regulation.
A regulator adjusted "wide open" is doing nothing and should be removed.
A properly designed and sized receiver tank is the major water removal device.
Last edited by Torque1st; May 1, 2007 at 05:43 PM.
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Posting Guru
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From: Florida Hill Country
Originally Posted by Torque1st
Compressing air to a high pressure then reducing that pressure with a regulator wastes energy. Dual selectable pressure switches may be a better option.
Post Fiend
Joined: Jun 2002
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From: Atlanta GA
Not that I know, just asking. Could tools wear out faster at the higher pressures because they are not getting enough oil to lube them? That maybe tool oil lube is only good for a certain amount of protection at so many RPMs before it becomes worthless?
Posting Legend
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Originally Posted by rlh
Torque, to you have details of how to set up dual pressure switches? I currently have a set of regulated hose connections and a set of unregulated ones.
Unloader type controls are something else but they can be done also.
Fixnair may have more information.
Last edited by Torque1st; May 2, 2007 at 10:52 PM.
Posting Guru
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From: Sapulpa OK
Yes I have seen them. They are used mostly on 300 PSI rotary screws. You can select 150 PSI service or 350 PSI service. This application is strictly a pneumatic control but you could wire up two pressure switches with a selector switch to alternate between the two settings at will.