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  1. #1
    Join Date
    Jan 2007
    Posts
    105

    Exclamation Another dumb compressor idea form Bjorn.

    Kay guys , heres another idea i have with compressed air. I dont have any money to buy a new air compressor cz i'm buying a new jeep, but i have a 6.5hp motor from my go-cart and was thinking could i just get one of those air compressor pumps from princess auto and build an air tank. I want the tank to be about 240 gallons, how thick would the pipe have to be?,, i figure i need about a 2 1/2' o.d. pipe ,, but how am i going to cap the ends? and what kind of valve do i need to stop the compressor when the tank is full?
    Jorgensen MFG.
    Custom trailers:from utility to semi trailers i make em all.
    argonweld_bjorn@hotmail.com
    www.ehhitch.com

  2. #2
    Join Date
    Aug 2006
    Location
    Oklahoma City, Oklahoma
    Posts
    304

    Default

    I'm going to completely stay away from advice on a tank fab job of that size....At 2.5' diam/120psi that works out to 84,780 lbs of force against each end (or 169,560lbs between the two).

    As for the motor controls, though. Your best bet is to just get an unloader valve that is designed for motor driven compressors. It is a combination unloader valve and idle control mechanism. When a predetermine pressure is reached, a cable connected to the carb throttle drops it back to idle, and it vents the compression back to the atmosphere and a check valve seals the tank. They never really shut off, they just redirect. SSS
    Last edited by SkidSteerSteve; 02-19-2007 at 10:25 PM.

  3. #3
    Join Date
    Jan 2007
    Posts
    105

    Post

    Thanks for the valve advice dude.. how did u figure out the pounds of pressure on the ends??..

    i'm going to do this anyways guys so dont try to convince me not to ..
    Last edited by Bmxin^Bjorn; 02-19-2007 at 10:34 PM. Reason: wrong words
    Jorgensen MFG.
    Custom trailers:from utility to semi trailers i make em all.
    argonweld_bjorn@hotmail.com
    www.ehhitch.com

  4. #4
    Join Date
    Feb 2007
    Location
    Central IL
    Posts
    179

    Default

    Hope you have good insurance, both liability and life!
    Flash me! I'm a welder.

    American by birth, Union by choice! Boilermakers Local 60

    America is a Union

  5. #5
    Join Date
    Jan 2007
    Location
    Montana, USA
    Posts
    234

    Default

    Curious about how one goes about fabricating the spherical ends of an air tank.

  6. #6
    Join Date
    Jan 2007
    Posts
    105

    Default

    i was planning just to cap it with plate and drill holes in it and run a rod through it to beef it up
    Jorgensen MFG.
    Custom trailers:from utility to semi trailers i make em all.
    argonweld_bjorn@hotmail.com
    www.ehhitch.com

  7. #7
    Join Date
    Dec 2006
    Location
    Wichita, Kansas
    Posts
    107

    Default

    Quote Originally Posted by Bmxin^Bjorn View Post
    ... how did u figure out the pounds of pressure on the ends??...
    Pounds per square inch X number of square inches (3.1416 X R^2)
    Tom Veatch
    Wichita, KS

  8. #8
    Join Date
    Aug 2006
    Posts
    163

    Default

    As for the motor controls, though. Your best bet is to just get an unloader valve that is designed for motor driven compressors. It is a combination unloader valve and idle control mechanism
    Where's a good source for one of these?

  9. #9
    Join Date
    Jan 2007
    Posts
    105

    Default

    pincess auto has stuff like that.. Should i mig weld it or tig?? any ideas?
    Jorgensen MFG.
    Custom trailers:from utility to semi trailers i make em all.
    argonweld_bjorn@hotmail.com
    www.ehhitch.com

  10. #10
    Join Date
    Nov 2006
    Location
    British Columbia
    Posts
    24

    Default Air tanks

    You can buy air tanks pre-made for a lot less trouble then building them. Spherical ends can also be bought.

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