Oxygen Cylinder Volume @ Different Pressures For Various Cylinders

Yankee Rebel · 7th July 2007, 08:05

i was playing around with GMP doing some figuring and comparing.. and i decided to make myself a chart so i could get an idea at a glance of how much O2 was going in my cylinders at different fill pressures. i thought id share it here incase there was any interest.
it is not an all inclusive list, just a list of representative sized cylinders of presumably common size and fill pressures.
the list can be updated to accomidate any other cylinders, including DIL cylinders.

is there any interest in this file?
right now its a WordPad .RTF file and i have to have someone convert it to a .PDF for me in order to post it.

if theres any interest, or anyone would like a specific bottle added, please list the following information and i will include it in my list before having the file converted to .PDF.
Country Of Origin
Manufacturer (if relevant to rebreather, otherwise cylinder MFG)
Size of Cylinder.. (CuFt or Liters)
Fill Pressure (PSI or BAR)

if there is any interst in seeing what i have so far, let me know and ill have the file converted so that i can post it.

Respectfully
Yankee Rebel

undrh2o · 7th July 2007, 15:24

Quote: (Originally Posted by Yankee Rebel)

is there any interest in this file?
right now its a WordPad .RTF file and i have to have someone convert it to a .PDF for me in order to post it.

You can make PDFs yourself by installing primopdf (http://www.primopdf.com/) it installs a printer driver which allows you to "print" to a PDF file and it's freeeware.

Yankee Rebel · 7th July 2007, 22:49

Quote: (Originally Posted by undrh2o)

You can make PDFs yourself by installing primopdf (Free PDF Converter - create high-quality PDF from any printable file type) it installs a printer driver which allows you to "print" to a PDF file and it's freeeware.

Thankya!!! i didnt know about this program, but ive got it downloading now!! it should be done by dinner time and then ill see about getting this thing converted over to PDF.

Yankee Rebel · 8th July 2007, 01:06

well here it is.... that PrimoPDF program worked painlessly!! super easy!! thankyou again!!

what do you think? is it worth continueing and expanding, or a waste of bandwidth and time?
yes im sure i sound like a real @$$hole in the big red type.. i just dont want anyone to blame anyone else for the results of their own actions.. if i die because of something i did.. fine.. i accept that as does anyone that knows me.. not everyone is like that though.. please understand...

fredrik · 8th July 2007, 13:35

Quote: (Originally Posted by Yankee Rebel)

well here it is.... that PrimoPDF program worked painlessly!! super easy!! thankyou again!!

what do you think? is it worth continueing and expanding, or a waste of bandwidth and time?
yes im sure i sound like a real @$$hole in the big red type.. i just dont want anyone to blame anyone else for the results of their own actions.. if i die because of something i did.. fine.. i accept that as does anyone that knows me.. not everyone is like that though.. please understand...

Are you actually using cylinders with the maximum pressure of 2000 psi (138 bar) in the US?
Sounds amazing to me, in Europe we stoped using 150 bar cylinders about 50 years ago. Nowdays it´s even hard to fingd 200 bar, 232-300 bar is whats around.

RAL · 8th July 2007, 15:02

Quote: (Originally Posted by fredrik)

Are you actually using cylinders with the maximum pressure of 2000 psi (138 bar) in the US?
Sounds amazing to me, in Europe we stoped using 150 bar cylinders about 50 years ago. Nowdays it´s even hard to fingd 200 bar, 232-300 bar is whats around.

Do not turn your nose up at LP tanks they have there use.
I use 14cf luxfers that are full at 2015 psi for my rebreather tanks. They have worked out very well. You can go forever transfilling off 120 @ 3600 psi for dil & a 150 cf o2 tank @ 2500 psi. Dive for a weekend with No compressor, no booster, no shop nearby, no problem.

Regards
Ral

tibby · 8th July 2007, 16:44

Just a thought, if you use metric you don't need a chart. You just multiply the cilinder size (water volume) by the fill pressure in bar. Ex: 3L tank x 200bar = 600L of O2 (or whatever gas). Of course this is no use to you if you still do your gas usage calculations using the standard system. Why even bother with standard? Switching to metric was one of the better diving decisions I've made so far but that may be just me.
Cheers,
Tibby

fredrik · 8th July 2007, 20:04

Quote: (Originally Posted by RAL)

Do not turn your nose up at LP tanks they have there use.
I use 14cf luxfers that are full at 2015 psi for my rebreather tanks. They have worked out very well. You can go forever transfilling off 120 @ 3600 psi for dil & a 150 cf o2 tank @ 2500 psi. Dive for a weekend with No compressor, no booster, no shop nearby, no problem.

Regards
Ral

So whats the benefits of 2000 psi tanks over 3000 psi tanks?
Does they got the same valves?

Yankee Rebel · 9th July 2007, 00:45

Quote: (Originally Posted by fredrik)

So whats the benefits of 2000 psi tanks over 3000 psi tanks?
Does they got the same valves?

the benifit of 2000psi tanks over 3000psi tanks is for people without a booster, they can still get full fills off what the gas suppliers give in the K bottles. folks with older compressors.. 2000psi can be easier to pump than 3000psi...
downside is to get equal volume at lower pressure.. the cylinder size has to increase to compensate.. upside is wall thicknesses can be thinner due to lower pressure.

or if youre like me.. you just use what you have or can get.

speaking of of old low pressure cylinders.. ive got 2 sets of twin 43's to go with my US DIvers Royal Aqua-Master. 1800psi fill pressure. no bouyancy, just a steel ruck frame they are mounted to... they still work as good today as the day they were put together.. looooooooooong before i got them.

babar · 9th July 2007, 01:09

Yup I've got a set of twin steel 72's that are older than me. They still work great, are in hydro. and pass visual. And I can transfill them, without boosting. could use a paint job though.

Quote: (Originally Posted by Yankee Rebel)

the benifit of 2000psi tanks over 3000psi tanks is for people without a booster, they can still get full fills off what the gas suppliers give in the K bottles. folks with older compressors.. 2000psi can be easier to pump than 3000psi...
downside is to get equal volume at lower pressure.. the cylinder size has to increase to compensate.. upside is wall thicknesses can be thinner due to lower pressure.

or if youre like me.. you just use what you have or can get.

speaking of of old low pressure cylinders.. ive got 2 sets of twin 43's to go with my US DIvers Royal Aqua-Master. 1800psi fill pressure. no bouyancy, just a steel ruck frame they are mounted to... they still work as good today as the day they were put together.. looooooooooong before i got them.

7th July 2007, 08:05	#1 (permalink)
Yankee Rebel Custom Title Allowed! Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jan 2006 Location: California Posts: 147	Oxygen Cylinder Volume @ Different Pressures For Various Cylinders i was playing around with GMP doing some figuring and comparing.. and i decided to make myself a chart so i could get an idea at a glance of how much O2 was going in my cylinders at different fill pressures. i thought id share it here incase there was any interest. it is not an all inclusive list, just a list of representative sized cylinders of presumably common size and fill pressures. the list can be updated to accomidate any other cylinders, including DIL cylinders. is there any interest in this file? right now its a WordPad .RTF file and i have to have someone convert it to a .PDF for me in order to post it. if theres any interest, or anyone would like a specific bottle added, please list the following information and i will include it in my list before having the file converted to .PDF. Country Of Origin Manufacturer (if relevant to rebreather, otherwise cylinder MFG) Size of Cylinder.. (CuFt or Liters) Fill Pressure (PSI or BAR) if there is any interst in seeing what i have so far, let me know and ill have the file converted so that i can post it. Respectfully Yankee Rebel
(Offline)

7th July 2007, 15:24	#2 (permalink)
undrh2o Chris Miller Current Rebreather/s: Other CCR Dolphin Home Build Other Rebreather/s: Inspiration Classic Other CCR Dolphin Home Build Join Date: Apr 2006 Location: Ottawa, Canada Posts: 206	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Quote: (Originally Posted by Yankee Rebel) is there any interest in this file? right now its a WordPad .RTF file and i have to have someone convert it to a .PDF for me in order to post it. You can make PDFs yourself by installing primopdf (http://www.primopdf.com/) it installs a printer driver which allows you to "print" to a PDF file and it's freeeware.
(Offline)

7th July 2007, 22:49	#3 (permalink)
Yankee Rebel Custom Title Allowed! Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jan 2006 Location: California Posts: 147	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Quote: (Originally Posted by undrh2o) You can make PDFs yourself by installing primopdf (Free PDF Converter - create high-quality PDF from any printable file type) it installs a printer driver which allows you to "print" to a PDF file and it's freeeware. Thankya!!! i didnt know about this program, but ive got it downloading now!! it should be done by dinner time and then ill see about getting this thing converted over to PDF.
(Offline)

8th July 2007, 13:35	#5 (permalink)
fredrik Rekodeko. Sweden Current Rebreather/s: Classic Kiss Other CCR Other Rebreather/s: Other CCR Join Date: Apr 2005 Location: Sweden Posts: 190	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Quote: (Originally Posted by Yankee Rebel) well here it is.... that PrimoPDF program worked painlessly!! super easy!! thankyou again!! what do you think? is it worth continueing and expanding, or a waste of bandwidth and time? yes im sure i sound like a real @$$hole in the big red type.. i just dont want anyone to blame anyone else for the results of their own actions.. if i die because of something i did.. fine.. i accept that as does anyone that knows me.. not everyone is like that though.. please understand... Are you actually using cylinders with the maximum pressure of 2000 psi (138 bar) in the US? Sounds amazing to me, in Europe we stoped using 150 bar cylinders about 50 years ago. Nowdays it´s even hard to fingd 200 bar, 232-300 bar is whats around. __________________ Fredrik Rekodeko, Sweden http://www.rekodeko.se
(Offline)

8th July 2007, 15:02	#6 (permalink)
RAL Longbottom Time Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Jan 2006 Location: North Florida Posts: 391	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Quote: (Originally Posted by fredrik) Are you actually using cylinders with the maximum pressure of 2000 psi (138 bar) in the US? Sounds amazing to me, in Europe we stoped using 150 bar cylinders about 50 years ago. Nowdays it´s even hard to fingd 200 bar, 232-300 bar is whats around. Do not turn your nose up at LP tanks they have there use. I use 14cf luxfers that are full at 2015 psi for my rebreather tanks. They have worked out very well. You can go forever transfilling off 120 @ 3600 psi for dil & a 150 cf o2 tank @ 2500 psi. Dive for a weekend with No compressor, no booster, no shop nearby, no problem. Regards Ral __________________ The sea does not care about you.
(Offline)

8th July 2007, 16:44	#7 (permalink)
tibby untitled Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: May 2007 Location: Salt Lake City, UT Posts: 338	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Just a thought, if you use metric you don't need a chart. You just multiply the cilinder size (water volume) by the fill pressure in bar. Ex: 3L tank x 200bar = 600L of O2 (or whatever gas). Of course this is no use to you if you still do your gas usage calculations using the standard system. Why even bother with standard? Switching to metric was one of the better diving decisions I've made so far but that may be just me. Cheers, Tibby
(Offline)

8th July 2007, 20:04	#8 (permalink)
fredrik Rekodeko. Sweden Current Rebreather/s: Classic Kiss Other CCR Other Rebreather/s: Other CCR Join Date: Apr 2005 Location: Sweden Posts: 190	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Quote: (Originally Posted by RAL) Do not turn your nose up at LP tanks they have there use. I use 14cf luxfers that are full at 2015 psi for my rebreather tanks. They have worked out very well. You can go forever transfilling off 120 @ 3600 psi for dil & a 150 cf o2 tank @ 2500 psi. Dive for a weekend with No compressor, no booster, no shop nearby, no problem. Regards Ral So whats the benefits of 2000 psi tanks over 3000 psi tanks? Does they got the same valves? __________________ Fredrik Rekodeko, Sweden http://www.rekodeko.se
(Offline)

9th July 2007, 00:45	#9 (permalink)
Yankee Rebel Custom Title Allowed! Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: Jan 2006 Location: California Posts: 147	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Quote: (Originally Posted by fredrik) So whats the benefits of 2000 psi tanks over 3000 psi tanks? Does they got the same valves? the benifit of 2000psi tanks over 3000psi tanks is for people without a booster, they can still get full fills off what the gas suppliers give in the K bottles. folks with older compressors.. 2000psi can be easier to pump than 3000psi... downside is to get equal volume at lower pressure.. the cylinder size has to increase to compensate.. upside is wall thicknesses can be thinner due to lower pressure. or if youre like me.. you just use what you have or can get. speaking of of old low pressure cylinders.. ive got 2 sets of twin 43's to go with my US DIvers Royal Aqua-Master. 1800psi fill pressure. no bouyancy, just a steel ruck frame they are mounted to... they still work as good today as the day they were put together.. looooooooooong before i got them.
(Offline)

9th July 2007, 01:09	#10 (permalink)
babar Curmudgeon Current Rebreather/s: Evolution Other CCR Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Sport Kiss Other CCR Join Date: Apr 2005 Location: Southern California Posts: 425	Re: Oxygen Cylinder Volume @ Different Pressures For Various Cylinders Yup I've got a set of twin steel 72's that are older than me. They still work great, are in hydro. and pass visual. And I can transfill them, without boosting. could use a paint job though. Quote: (Originally Posted by Yankee Rebel) the benifit of 2000psi tanks over 3000psi tanks is for people without a booster, they can still get full fills off what the gas suppliers give in the K bottles. folks with older compressors.. 2000psi can be easier to pump than 3000psi... downside is to get equal volume at lower pressure.. the cylinder size has to increase to compensate.. upside is wall thicknesses can be thinner due to lower pressure. or if youre like me.. you just use what you have or can get. speaking of of old low pressure cylinders.. ive got 2 sets of twin 43's to go with my US DIvers Royal Aqua-Master. 1800psi fill pressure. no bouyancy, just a steel ruck frame they are mounted to... they still work as good today as the day they were put together.. looooooooooong before i got them. __________________ Babar Evolution Plus Sport kiss
(Offline)

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