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High pressure storage, free co2 and bonus parts.

A place to ask general spud cannon related questions.
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High pressure storage, free co2 and bonus parts.

Unread postAuthor: Gippeto » Fri Apr 11, 2008 1:40 pm

A little history;

I have been looking around for a pressure reservoir to build my Poland Spud compressor.

I called the local fire safety company and enquired about co2 fire extinguishers.

They apparently throw them away when they are out of date. I could have them for hauling them away. :)

When I went to pick them up this morning, I was asked if I wanted empty ones, or full ones. :D I picked up 2 x 5lb and 1 x 10lb, the 10 and one of the 5's are full.

I removed the valve from the empty 5lb and verified that it does have 1/2" NPT threads.

These bottles have an 1800psi rating, and are steel. (heavy 13+lbs empty for the 5lb)

Then I noticed the swivel on the nozzle. Once you remove the nut, you have a ready made probe style fill, with 1/4" NPT threads. :lol:

The 10lb looks to have 1" NPT threads and even comes with a pressure hose.

The main valves could be used to replace a blow gun maybe?


Other details:

These are old General brand extinguishers.

The 10lb weighs 20 1/2 lbs empty according to the stamp on the valve. +10lbs when full of course. :)

The pressure hose has a rating of 2500psi on it.
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Last edited by Gippeto on Fri Apr 11, 2008 6:31 pm, edited 1 time in total.
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Unread postAuthor: POLAND_SPUD » Fri Apr 11, 2008 1:48 pm

wow... I must do the same...

I'm really suprised that they are 1/2 NPT
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Unread postAuthor: biggsauce » Fri Apr 11, 2008 1:51 pm

Wow nice find! I just might have to stop by our fire station and try my luck

How heavy would you say the 10lb tank?
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Unread postAuthor: LikimysCrotchus5 » Fri Apr 11, 2008 1:58 pm

biggsauce wrote:How heavy would you say the 10lb tank?


10 pounds :roll: :lol:
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Unread postAuthor: BC Pneumatics » Fri Apr 11, 2008 2:22 pm

LikimysCrotchus5 wrote:
biggsauce wrote:How heavy would you say the 10lb tank?


10 pounds :roll: :lol:


A 10lb tank holds 10lbs of CO2, and if it is also steel, will weight much more than 10lbs.

Even my 20lb AL tank weighs more than it's capacity.
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Unread postAuthor: LikimysCrotchus5 » Fri Apr 11, 2008 2:24 pm

So what does the 10lb refer to?
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Unread postAuthor: BC Pneumatics » Fri Apr 11, 2008 2:29 pm

LikimysCrotchus5 wrote:So what does the 10lb refer to?


As I said, a 10lb take holds 10lbs of CO2, it is simply the CO2 capacity. Just as a 12g tank holds 12g of CO2, and a 9oz tank holds 9oz of CO2.
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Unread postAuthor: LikimysCrotchus5 » Fri Apr 11, 2008 2:31 pm

O sorry, i misunderstood, but i got it, i feel idiotic :oops:
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Unread postAuthor: BC Pneumatics » Fri Apr 11, 2008 2:34 pm

No worries, this is how people learn things.
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Unread postAuthor: JDP12 » Fri Apr 11, 2008 2:37 pm

wow nice find! I'll have to talk to my friend who is a volunteer firefighter about getting some of these...
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Unread postAuthor: ballores » Fri Apr 11, 2008 3:23 pm

My fire extinguishers come from the recycling site they like you to bring them back empty which is quite easy ,also my son likes them in the warm pool in the summer good water canons.
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Unread postAuthor: Gippeto » Fri Apr 11, 2008 6:39 pm

I updated and added a couple pics as promised.

Now I need a nitrogen regulator (500psi output). :)

It was most definitely worth the phone call! :D
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Unread postAuthor: JDP12 » Fri Apr 11, 2008 6:41 pm

nice... what volume are those? (cubic inches maybe?) Yea I need a cheap regulator for the gun I'm building my friend.. and it has to be real cheap... lol
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Unread postAuthor: DYI » Fri Apr 11, 2008 6:58 pm

Now I need a nitrogen regulator (500psi output).


Better hope your wallet's pretty fat. I had to shell out over $250 for my 0-500 psi N<sub>2</sub> reg.
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Unread postAuthor: Gippeto » Fri Apr 11, 2008 7:51 pm

The 5lb ones are about 4.5" (acounting for wall thickness) in dia. and about 11" to 1/3 of the curved portion. (if that makes any sense)

A rough calculation would put it at 175 cu.in. I would suppose that the 10lb would be double that because it's liquid co2.

No problems on the regulator, ebay has them for around 80.00 plus shipping. (Ok it's only 450psi, but I only need 400)
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