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Thread: My portable/stationary air compressor idea

  1. #26
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by mla2ofus View Post
    I can't figger why anyone other than an industrial setting needs 200 psi.
    I think it may have to do with running multiple air nailers, but im not sure.
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    Re: My portable/stationary air compressor idea

    two compressors equals twice the noise. Why not just get an appropriately sized compressor for the job? I would get a quincy 3.5 HP or 5 HP and call it good.

    https://www.aircompressorsdirect.com...or/p12330.html

    https://www.aircompressorsdirect.com...ssor/p855.html
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  4. #28
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by Louie1961 View Post
    two compressors equals twice the noise. Why not just get an appropriately sized compressor for the job? I would get a quincy 3.5 HP or 5 HP and call it good.

    https://www.aircompressorsdirect.com...or/p12330.html

    https://www.aircompressorsdirect.com...ssor/p855.html
    twice the noise. Yes that's true but this compressor is quiet, However two of them might be more noisy, you have a point. But if i bought a big compressor what fun would that be? I like creating things. I already have one compressor, all i need is $300 more to buy another, that verses $900 for a big boy. But maybe you're correct. I'll think about it.
    Last edited by Need Advice; 3 Weeks Ago at 07:31 PM.
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  5. #29
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    Re: My portable/stationary air compressor idea

    I ran my air tools and everything for years off a 3 HP Campbell Hausfeld with a 20 gallon tank... but that being said, the last pump I bought was no where as efficient as the ones I started with in 1985. I painted cars with it using syphon feed guns... if you were using a lot of air, sometimes you had to wait, but it worked out well. I can't say I've regretted buying my 5 HP 2 stage Ingorsol/Rand with the 80 gal. tank though... lots of dry air is a big plus in the shop.
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  7. #30
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by whtbaron View Post
    I ran my air tools and everything for years off a 3 HP Campbell Hausfeld with a 20 gallon tank... but that being said, the last pump I bought was no where as efficient as the ones I started with in 1985. I painted cars with it using syphon feed guns... if you were using a lot of air, sometimes you had to wait, but it worked out well. I can't say I've regretted buying my 5 HP 2 stage Ingersoll/Rand with the 80 gal. tank though... lots of dry air is a big plus in the shop.
    Thanks. I also thought about buying a 20 gallon 200 PSI and running it with the one i already have so i wouldn't need to buy an extra tank, but it would need to be quiet. But like another poster said two compressors are double the noise. I know a big one like you have is noisy, i use to have one years ago and I've worked around big compressors too. If i had a separate insulated room to put it in i would just put the compressor in there, but i dont. I know air tools are noisy so why not just get a noisy compressor? Im just trying to cut down on noise where i can.
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  8. #31
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by Need Advice View Post
    I think it may have to do with running multiple air nailers, but im not sure.
    I've never heard of a nail gun requiring 200 psi. The CFM dictates how many nail guns can be run off a given compressor.
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  9. #32
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by mla2ofus View Post
    I've never heard of a nail gun requiring 200 psi. The CFM dictates how many nail guns can be run off a given compressor.
    I said i think its for multiple air nailers but im not sure. I don't know exactly why it has 200 PSI but I'm willing to bet that a 6 gallon tank with 200 PSI will deplete a lot slower than a 6 gallon tank with 100 psi, twice as slow actually. 100 PSI can run one nailer but 200 psi can run two. Its like having two 100 psi air compressors in one, perhaps,. Also a pump that can pump 200 psi might have a larger cylinder which would give more CFM but im unsure of that.
    Last edited by Need Advice; 3 Weeks Ago at 10:36 PM.
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  10. #33
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    Re: My portable/stationary air compressor idea

    Air tools are typically rated for 90 psi, I worked in a sulphuric acid plant & we had a large 3 stage compressor that put out 500 psi( on a great day), it was also nearly impossible to keep third stage valves in, every performance enhancement comes at a cost. I think the third stage on that compressor was over 8 inch bore.., but it was an industrial compressor, reallyt industrial.
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  12. #34
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    Re: My portable/stationary air compressor idea

    The guy that helped me get the seized Allis home had his compressor on his truck set to something like 200+ psi. I guess they do it all the time for filling big tires fast. Filled my tire in just a few minutes. There's some decent guys in the oil patch. K'kins works with some of the best.

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  14. #35
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by farmersammm View Post
    The guy that helped me get the seized Allis home had his compressor on his truck set to something like 200+ psi. I guess they do it all the time for filling big tires fast. Filled my tire in just a few minutes. There's some decent guys in the oil patch. K'kins works with some of the best.
    The compressor on my equipment service truck is set for 200 psi. the smaller lines are regulated to 150 psi but the big line for the 1" impact is full 200, it's nice when changing cutting edges with 1" bolts. First pull of the trigger knocks them loose and spins them right off, instead of rattling for 30 seconds wasting air and gas. And it will inflate huge tires in a hurry.

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  16. #36
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by mla2ofus View Post
    I've never heard of a nail gun requiring 200 psi. The CFM dictates how many nail guns can be run off a given compressor.
    Why are you so hung up on the 200 psi ?

    That's what's in the tank. You don't have to use it at that pressure.
    In fact his compressor probably has an output regularot on it.

    If you want more air, you need more pump volume and more motor HP
    That compressor is made to be portable, so both of those are limited.

    If you want more surge capacity, you can use a larger tank, or store it at a higher pressure and regulate it down for use.
    Again, larger tank is not portable.
    So they pump it in at a higher pressure, regulate it lower on the output, they get a little more air out of a limited size package.

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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by Mac's Crew View Post
    Propane tanks work, Craigslist for shot craps compressors.
    Propane tanks work, they are tested to 400 psi.
    The 100 pound tanks are pretty cheap compared to BBQ sized

    But the bbq 20 pounders often get thrown away because they are on the old valve style.

    Do you have pressurized gas cylinders you can't get refilled locally, they are at a working pressure in the thousands, great safety margin.


    But when you use them, take the valves off and replace with normal fittings.
    They are standard NPT thread fittings.

    Take a valve apart and you will see the actual valve passages are maybe an eighth of in inch or less, Highly restricted.
    If you go full size pipe, it opens up to 3/4" npt which is far larger than 3/4"

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  19. #38
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    Re: My portable/stationary air compressor idea

    The primary benefit of a 200psi compressor is that it compresses more reserve air into the tank, which effectively increases your available air storage but in a smaller package.

    I have linked compressors together back when I had my machine shop. I only needed the extra volume for running the bead blast cabinet. It was no big deal to link them but for maximum effectiveness you want to link the tanks together in the high pressure side of the regulator, not downstream of it. Be sure that whatever hose that you use to link them is rated for the pressure.

    Personally, if you intend to use a lot of high demand air tools (such as a blast cabinet or high cam impacts), I would not use those Rigid compressors but instead opt for a higher cam version. The reason why is that oil less compressors are typically not rated for continuously duty applications. I’ve melted some down before when they ran continuously.
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  21. #39
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by SweetMK View Post
    IMHO,, the specs are being mis-read,,

    The amperage needed to produce 200psi @ over 5CFM would be WAY beyond the typical 115 volt outlet,,

    ( the compressor MIGHT produce 200psi,,, OR 5cfm,, but, not both at the same time)
    (The compressor might take a half hour to pump up to 200psi,, but,, it will get there eventually!! LOL!!)

    THEN two of them running would double the amperage. You might need 40 amps or more to get 10CFM @ 200psi,,

    Now, some place like HF would list specs like that,, but, simply because of the language barrier of the company printing the box.

    Also, synchronizing the two compressors would be difficult, the unit would need to be rewired so that one pressure switch controls both compressors.
    otherwise, one compressor would run, not allowing the other compressor to drop below the cut-in pressure.
    It took 2 minutes to fill the tanks, but they are small tanks too. Actually it took less than 2 minutes, i fumbled looking for the switch and i also didn't use a stop watch so it could have been a minute and a half for all i know.
    Last edited by Need Advice; 3 Weeks Ago at 09:23 AM.
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  22. #40
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    Re: My portable/stationary air compressor idea

    thanks for the input folks. Maybe i will just get a bigger compressor.
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  24. #41
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by Oscar View Post
    They don't have to be synchronized. All you need is a pneumatic one-way check-valve on each line feeding the tank. That's how I actually have mine, and it works.
    I don't even bother with check-valves. I run 3 compressors sometimes.

    I set the outgoing regulator on each to 100psi for sandblasting.

    The compressor motors kick in whenever their own pressure switch tells them too.
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  25. #42
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by MinnesotaDave View Post
    I don't even bother with check-valves. I run 3 compressors sometimes.

    I set the outgoing regulator on each to 100psi for sandblasting.

    The compressor motors kick in whenever their own pressure switch tells them too.
    What CFM and tank size do your compressors have?
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  26. #43
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    Re: My portable/stationary air compressor idea

    With the amount of time and effort it would take to rig up multiple compressors, I could earn enough to buy a nice Quincy that is quiet and reliable and will last decades.

    Yep I like to DIY stuff too but sometimes it isnít practical.


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  28. #44
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by mcspeed View Post
    With the amount of time and effort it would take to rig up multiple compressors, I could earn enough to buy a nice Quincy that is quiet and reliable and will last decades.

    Yep I like to DIY stuff too but sometimes it isn’t practical.


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    My neighbor has a Quincy. I looked it up on the internet and that's an expensive compressor. Needless to say he doesn't want to sell it. It only takes a minute to plug hoses in. But like someone else said my particular compressor might not be designed to run all the time so maybe I'll just get a bigger compressor. I don't want to rein a good $300 air compressor.
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  29. #45
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    Re: My portable/stationary air compressor idea

    Quote Originally Posted by MinnesotaDave View Post
    I don't even bother with check-valves. I run 3 compressors sometimes.

    I set the outgoing regulator on each to 100psi for sandblasting.

    The compressor motors kick in whenever their own pressure switch tells them too.
    Very true. I was being too liberal with the word "need". I tend to favor to use them, but it's definitely possible to do without them so long as the weakest "rated" tank can handle all of the pressure being built-up by the highest-psi compressor, if there is one.
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