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Old 04-08-2006, 12:33 AM #1
Swearwords
 
 
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The Numbers

Hi, I understand the difference between a 3000 and 4500 PSI Tank.

But I dont understand the little number before the capacity.
Like 48 3000
Or 72 3000
What do these numbers mean?
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Old 04-08-2006, 12:38 AM #2
careyman_462
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The first number is how many cubic niches the tank can hold. So, a 48/3000 can hold 48 cubic inches of air at 3000 psi.
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Old 04-08-2006, 12:40 AM #3
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Oh, so a 48 will hold more than a 72?

I thought the point of the 4500 was to hold more air?
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Old 04-08-2006, 12:45 AM #4
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No, a 72/3000 can hold 72 cubic inches of air at 3000 psi. Thus 72/3000 > 48/3000. With a 4500 psi tank, you can hold more pressure, thus more air, but not necessarily a greater volume of air.
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Old 04-08-2006, 12:47 AM #5
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Oh. So, for example, You have a 72 3000, and a 72 4500, They hold the same amount of air, but the 4500 has it more 'crammed in'.
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Old 04-08-2006, 12:52 AM #6
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Yeah, same volume, but the 72/4500 has more air (like more molecules), thus more shots. You get about 10 shots per ci w/ 3000 psi, and 15 w/ 4500 psi.
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Old 04-08-2006, 12:53 AM #7
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not quite, a 72/3000 and a 72/4500 hold the same volume of air (72 cubic inches) BUT a 72/4500 contains more air, as the air is pressurized more. in other words a 72/3000 gets you on average 720 shots, and a 72/4500 gets you on average 1080 shots, because more air is crammed into it. Carey, I know you like telling people the physics of volume, but when people ask how much air, or the amount of air, they aren't asking volume, their asking amount. it just confuses people to do that to them.
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Old 04-08-2006, 12:53 AM #8
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Ooooohhh.

Well that was confusing.

But I think I understand now.

Thanks!
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Old 04-08-2006, 12:54 AM #9
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No no, you both explained it pretty much the same way.

Accept one of you used less fancy words.
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