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#1 matt the weird

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Posted 27 December 2008 - 10:10 PM

What is the math on getting a scuba tank how many filling? what is the best size? I know most scuba tanks are 3000 psi so thats all you can fill in your tank. then after the first fill you lose pressure. it go's down. so what is the math.

#2 slinkyaroo

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Posted 27 December 2008 - 10:16 PM

What size of PB tank are you filling before we can answer you?

Doh - you forgot that one. :o


Anyways I will get about 8 good top ups on a 68/3000 then my refills are less than 2000 psi.



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Edited by slinkyaroo, 27 December 2008 - 10:16 PM.


#3 matt the weird

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Posted 27 December 2008 - 10:23 PM

I have a 68 4500 I know that I wouldn't get a full fill but if buys me games I'm ok with that. I buddy is thinking of It too has has a bunch of tanks 45 3000 steel and bigger

#4 slinkyaroo

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Posted 27 December 2008 - 10:27 PM

You're 68/4500 would be equivalent to my 68/3000 in this case. I can shoot a case on one scuba tank and my refills would be around 1800 psi after that.

I got 3 scuba tanks now and we cascade off of them. One tank per man is good math.


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#5 matt the weird

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Posted 27 December 2008 - 10:29 PM

how big are your tanks all 80s?

#6 slinkyaroo

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Posted 28 December 2008 - 09:41 AM

yes - 80's



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#7 brycelarson

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Posted 28 December 2008 - 10:15 AM

here's the best answer I've ever seen to this question:

scuba fill calculator

#8 matt the weird

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Posted 28 December 2008 - 09:06 PM

Thank you I did find it too PAINTBALL TANK FILLING APPARATUS LABORATORY TESTS

Using a 47 cubic inch paintball gun tank and the PAINTBALL TANK FILLING APPARATUS loaded to 3000 psi, the following results were obtained using rapid and repeated fire:

* 1st Paintball Tank Fill - 3000 psi - 1000 shots
* 2nd Paintball Tank Fill - 2950 psi - 983 shots
* 3rd Paintball Tank Fill - 2900 psi - 966 shots
* 4th Paintball Tank Fill - 2850 psi - 949 shots
* 5th Paintball Tank Fill - 2800 psi - 932 shots
* 6th Paintball Tank Fill - 2750 psi - 915 shots
* 7th Paintball Tank Fill - 2700 psi - 898 shots
* 8th Paintball Tank Fill - 2650 psi - 881 shots
* 9th Paintball Tank Fill - 2600 psi - 860 shots
* 10th Paintball Tank Fill - 2550 psi - 847 shots
* 11th Paintball Tank Fill - 2500 psi - 830 shots
* 12th Paintball Tank Fill - 2450 psi - 813 shots
* 13th Paintball Tank Fill - 2400 psi - 796 shots
* 14th Paintball Tank Fill - 2350 psi - 779 shots
* 15th Paintball Tank Fill - 2300 psi - 762 shots
* 16th Paintball Tank Fill - 2250 psi - 745 shots
* 17th Paintball Tank Fill - 2200 psi - 728 shots
* 19th Paintball Tank Fill - 2150 psi - 711 shots
* 20th Paintball Tank Fill - 2100 psi - 694 shots
* 21st Paintball Tank Fill - 2050 psi - 677 shots
* 22nd Paintball Tank Fill - 2000 psi - 660 shots

#9 GrenadeMaster

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Posted 28 December 2008 - 11:16 PM

How BIG is the filling apparatus?
There's two kinds of people in this world when you boil it all down. You got your talkers and you got your doers. Most people are just talkers, all they do is talk. But when it is all said and done, it's the doers that change this world. And when they do that, they change us, and that's why we never forget them. So which one are you? Do you just talk about it, or do you stand up and do something about it?

#10 Matrix

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Posted 29 December 2008 - 09:25 AM

if you want, i can do a test.

i have two scuba tanks

and a 68/3000

i can put down my results if thats what your looking for.
i dont have the tank with me atm because they are being visually inspected.

#11 matt the weird

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Posted 31 December 2008 - 12:02 AM

hey I'm all for a real test from someone on here Thanks man. also how long between hydro. tests 3 or 5. Is just like paintball tanks and I depends on your tank.

#12 matt the weird

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Posted 31 December 2008 - 12:06 AM

Also on a side note I'm looking for some sites for buying a tank. http://www.diversdirect.com is the best one that I found. I'm still looking if I can save on shipping

#13 brycelarson

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Posted 31 December 2008 - 12:06 AM

hydro 3 - VIP 1

there's an annual visual inspection for scuba tanks - technically that's just if you're using them to dive - but good luck getting one filled w/o the VIP sticker.

#14 matt the weird

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Posted 31 December 2008 - 12:16 AM

How BIG is the filling apparatus?




it's small and easy I saw a vid on it. so now i'm an expert
here one;

http://www.paintball...m/trscfist.html

#15 GrenadeMaster

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Posted 31 December 2008 - 12:20 AM

Maybe your missing the point...

What was the size of the scuba tank...

If I have a scuba tank the size a semi truck, I will get a lot more fills off of it compared to a telephone booth sized scuba tank.

Volume / Pressure Relationships?
There's two kinds of people in this world when you boil it all down. You got your talkers and you got your doers. Most people are just talkers, all they do is talk. But when it is all said and done, it's the doers that change this world. And when they do that, they change us, and that's why we never forget them. So which one are you? Do you just talk about it, or do you stand up and do something about it?

#16 matt the weird

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Posted 31 December 2008 - 12:25 AM

now I can't find the site that I got that off of. but I think it was 80cu 3000psi. I will look

Edited by matt the weird, 31 December 2008 - 12:25 AM.


#17 GrenadeMaster

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Posted 31 December 2008 - 12:26 AM

Ok... that would make sense. That makes a huge difference lol.
There's two kinds of people in this world when you boil it all down. You got your talkers and you got your doers. Most people are just talkers, all they do is talk. But when it is all said and done, it's the doers that change this world. And when they do that, they change us, and that's why we never forget them. So which one are you? Do you just talk about it, or do you stand up and do something about it?

#18 matt the weird

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Posted 31 December 2008 - 12:33 AM

here's the best answer I've ever seen to this question:

scuba fill calculator


doing the math on the site you got there make the sates that I found are wrong. Damn it

#19 brycelarson

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Posted 31 December 2008 - 07:20 AM

Matt - those numbers on the calc I found seem about right based on my experience.

and the standard scuba tank is pressurized to 3000 psi when 80 cubic feet of air are jammed in there - I don't know what the actual interior volume of the tank is. This is different than paintball tanks - where the volume of the tank is what we label them.




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