How much air compressor do I need to occasional air up a tire that needs 110 PSIs?

by Michael
(Montgomery, AL)

I have a 5th wheel travel trailer that needs 110 PSI in the tires and I am looking to buy a portable air compressor to carry with me. I want to get a small enough one that will give me enough air for my tires.

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Michael, see the Sizing pages for in detail answers to that question.

Essentially, if the compressor can output your 110 PSI, then the other question is that of time. How fast will a compressor provide enough air at that 110 PSI to fill your tires, and is that fast enough for you.

Cheers,

Bill

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Compressed air for cleaning keyboard and statues?

by Robert H.
(Ohio)

These are 3 of the statues that the air compressor would be used on.

These are 3 of the statues that the air compressor would be used on.

I have been searching the internet to try and find an air compressor that can not only be used on my laptop (for the keyboard), but also on collectibles.

I'm a collector of video game merchandise, and have several high-end video game statues.

I've been using a soft clothe to dust them off, but am worried of scuffing the paint on them. I've looked for cans of compressed air, but discovered that all of the different brands included some type of additive that would damage the statues themselves. I was curious if you knew of an air compressor that could be used to clean my keyboard, but could also be effective (and gentle) in cleaning my statues and several of my other collectibles without causing any damage? Any help is greatly appreciated! I've been searching the internet for a very long time and have not been able to find anything. I'm a high school student, so I don't have any experience/knowledge on this matter at the current time.
Thank you for your time, and as I said, any help is greatly appreciated!
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Hi Robert...

You have raised a number of issues, most of which are already addressed the pages of this site, so for more details, use the sitemap page to narrow your search.

Yes, you can use gentle (low pressure) compressed air from your compressor to clean a keyboard. If you have no filter on the discharge line, you may - emphasize may - be spraying on water vapor or free water too, as compressing air into a tank generates a lot of water.

Blowing off electronic components can generate an electrical charge which has the potential to damage circuitry.

If your air is clean and dry, and you modulate the force of the air with your compressor regulator, blowing dust off collectibles should work. Recognize that any particulate in the air that is blowing onto anything may cause abrasion (that's what air-driven sand blast units do) so be sure that all that is blowing onto the item is clean air.

Cheers,

Bill

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Mitary Air compressor big enough to run my air tools?

by Richard
(Long Beach, CA.)

I have a old Mitary Air compressor 15 CFM, 3 Phase, 7.5 HP, not sure how many gallons I think 200. Will this meet the need for a tire machine 100 PSI, DA Sander 90 PSI and paint gun with 3 guys working before I hook it up to power.
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Richard, I have no information on your compressor, yet am puzzled by the output of 15 CFM. That seems a little low for a 7.5 HP air compressor.

In any case, your question is difficult to answer because you haven't provided all the info needed to do so.

You have a "DA Sander 90 PSI" but is this a small, DIY type air sander, or an industrial one. The industrial one will consume much more air at 90 PSI than a small one will.

"a tire machine 100 PSI" is a one-shot type of device, meaning that is uses compressed air when it cycles, and then stops using air. So you should be good with this.

"paint gun with 3 guys working" asks the same question as with the sander. How big a paint gun.

In all case, if you wish to run your air tools simultaneously and for an entire shift, you need to know the CFM requirements and the PSI requirements of your tools. Without that information, you are just guessing.

And just guessing is what I am when I say you probably will not have enough air to do all you want to do if your air compressor truly is a 15 CFM compressor.

Cheers,

Bill


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2 cylinder vs 4 cylinder units

by MIKE
(MONTREAL CANADA)

INGERSOLL RAND T30 Model - 71T2-10E

INGERSOLL RAND T30 Model - 71T2-10E

INGERSOLL RAND T30 Model - 71T2-10E
rk compressors model DF-75120H 7.5 HP

HI BILL!!!! this site deserves an excellency award!!!

i just bumped into it looking for info. i have 2 simple questions: i'm shopping for a compressor and stuck on these 2 models both are the 575 3 phase models

1: INGERSOLL RAND T30 Model - 71T2-10E 10 HP
2: rk compressors model DF-75120H 7.5 HP may also be same as some othe brands

the t30 is a 2 cyl the rk is a 4 cyl

question 1:
which one runs quieter and which is better in air quality meaning cfm as both can run at 175psi?
i know ir is very good in quality and reliablity and rk i think is a lower end build but it has the intercooler and aftercooler and 4 cyl. which might mean that its quieter runs cooler and less water buildup. do i stand correct. i preffer a lower in db unit with better air quality cfm and dryness than a higher quality/reliablity unit. if both have similar air quality cfm and dryness but the rk is less in db i will get the rk. if the ir is less in db i will get the ir.
question 2:
in general which is a better performing unit a 2 cyl or 4 cyl i would say the 4 but probably brand design also needs to be taken into consideration.

i've never heard of rk are they of any good or stay far. here's the link to the rk model.
http://rkcompressors.com/COMPS%20%26%20PUMPS%20PAGES/TSDF75120.html

this is for a 2-3 car repair shop with 1 tire machine. THANKS!!!
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Mike, your comments are very kind. Thank you.

As to question "which one runs quieter and which is better in air quality meaning cfm as both can run at 175psi?" you will have to get the Db specifications from their respective websites, or if another visitor has that information they might share it as a comment here.

I fear that both will be quite loud, and if you visit the page on this site about compressor location, you'll find information about sound reducing for noisy compressors.

If you are going to put the compressor behind a wall or in a cubby, then either would do as far as sound goes, in my opinion.

I have had no experience with the RK Air Compressor. Their website www.rkcompressors.com provides information about their products but no where can I see where they are located or their compressors manufactured. They refer to their clients getting service at an authorized dealer, but do not show a dealer list??? Anyone else have experience - good or bad - with RK Compressors?

IR on the other hand is a worldwide brand, with tons of info about their products and dealer network.

As to which provides better air - that's subjective. Typically the larger the HP of the electric motor on a compressor the higher the air volume produced, and that rule of thumb is that you'll get about 4 HP of compressed air at 90 PSI for reach HP of motor size.

So, a 10 HP compressor should be able to deliver more air faster than a 7.5 HP.

Then, there's the multiple cylinder issue. Once again, you'll have to go back to specs to determine what the actual CFM of compressed air is that each compressor can deliver.

More importantly, and this you don't appear to have done, is determine what your compressed air consumption will be for your shop.

Garages often run with 5 HP air compressors on 60 gallon tanks as compressed air use is not constant, giving the air compressor lots of time to rebuild air once it's used.

Tire machines too are incremental users of air.

Look at your highest demand air tool, likely the impact wrenches, and figure out the air demand of all three (one for each bay) running at the same time. I suspect you'll find that either the 7.5 HP or the 10 HP will be lots of air, particularly if it's a 60 gallon tank or larger.

Cheers,

Bill

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