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Which Size Tank
- Thread starterBudg62
- Start date
Thread Status: Hello
, There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.
It can take a long time to get an up-to-date response or contact with relevant users.
http://forums.deeperblue.net/forum83/thread65229.html
honestly, if they didn't teach you about Tank Volume and Pressure in your Basic Course, you should seek out better instruction.
honestly, if they didn't teach you about Tank Volume and Pressure in your Basic Course, you should seek out better instruction.
The Bar rating is based on the fill pressure of the tank, ie the pressure required to get the volume of gas in the tank, liter is the volume of the tank. Being on the wrong side of the "pond" our tanks are in PSI and CuFt.
A very very simple example, 2 tanks that are physically different, ie short tank and tall tank, both hold lets say 12L (same volume) the small tank would be a 300bar and the tall tank would be a 200bar, it would take greater pressure in the small tank to get the same volume as in the big tank. Get it??
This is not always the case but a very general example.
John
A very very simple example, 2 tanks that are physically different, ie short tank and tall tank, both hold lets say 12L (same volume) the small tank would be a 300bar and the tall tank would be a 200bar, it would take greater pressure in the small tank to get the same volume as in the big tank. Get it??
This is not always the case but a very general example.
John
I'm not sure if you're taking the piss or not? :t
Is this a test?
Did you read the reply to your other post asking the same question? :vangry
http://forums.deeperblue.net/585959-post3.html
Get a grip. :duh
Dave :king
PS Sorry John but you got that a bit wrong. Probably the units confused you. Two different sized tanks would have different volumes in litres. Cubic feet doesn't equate to litres as litres measure the size at 1 bar (Normal atmosphere) but cubic feet take into account the pressure that the tank is charged to.
Just to give an example using John's 2 tanks. The small one would be 10 litres and the big one would be 15 litres. To hold the same amount of air the 10L would need 300 Bar and the 15L would need 200Bar. Then they would both contain the same amount of air in Cubic Feet (about 90 cu ft).
QED
Is this a test?
Did you read the reply to your other post asking the same question? :vangry
http://forums.deeperblue.net/585959-post3.html
Get a grip. :duh
Dave :king
PS Sorry John but you got that a bit wrong. Probably the units confused you. Two different sized tanks would have different volumes in litres. Cubic feet doesn't equate to litres as litres measure the size at 1 bar (Normal atmosphere) but cubic feet take into account the pressure that the tank is charged to.
Just to give an example using John's 2 tanks. The small one would be 10 litres and the big one would be 15 litres. To hold the same amount of air the 10L would need 300 Bar and the 15L would need 200Bar. Then they would both contain the same amount of air in Cubic Feet (about 90 cu ft).
QED
Last edited:
Old Man Dave said:I'm not sure if you're taking the piss or not? :t
Is this a test?
Did you read the reply to your other post asking the same question? :vangry
http://forums.deeperblue.net/585959-post3.html
Get a grip. :duh
Dave :king
PS Sorry John but you got that a bit wrong. Probably the units confused you. Two different sized tanks would have different volumes in litres. Cubic feet doesn't equate to litres as litres measure the size at 1 bar (Normal atmosphere) but cubic feet take into account the pressure that the tank is charged to.
Just to give an example using John's 2 tanks. The small one would be 10 litres and the big one would be 15 litres. To hold the same amount of air the 10L would need 300 Bar and the 15L would need 200Bar. Then they would both contain the same amount of air in Cubic Feet (about 90 cu ft).
QED
Thanks, liters, bars, I will stick with cuft.
John
Yeh! Well you got the best system.
We had to change 'cause of the stupid Metric system and the crazy European Union.
At least you know how much air is in your tanks without having to have a degree in maths.
God bless America. :inlove
Dave
We had to change 'cause of the stupid Metric system and the crazy European Union.
At least you know how much air is in your tanks without having to have a degree in maths.
God bless America. :inlove
Dave
Lots of people do that. Don't worry.
Personally I recomend always going to quick links and clicking on "Subscribed Threads". It's got nothing to do with paid subscriptions but lists any thread that you have subscribed/written/posted on. Got it?
Welcome to DB.
Dave
Ps where you from in the UK?
Personally I recomend always going to quick links and clicking on "Subscribed Threads". It's got nothing to do with paid subscriptions but lists any thread that you have subscribed/written/posted on. Got it?
Welcome to DB.
Dave
Ps where you from in the UK?
Hi Dave
Thanks for the tip and the welcome!
I live in Bury St Edmunds, Suffolk. But hoping to move to Spain later this year.
I found this site by accident, surfing the net looking for info on tanks!!!
From what I have seen so far it looks a good site. Even though I am an AOWD I still consider myself a novice with only 16 logged dives, so I am always on the look out for good advice.
Adam
Thanks for the tip and the welcome!
I live in Bury St Edmunds, Suffolk. But hoping to move to Spain later this year.
I found this site by accident, surfing the net looking for info on tanks!!!
From what I have seen so far it looks a good site. Even though I am an AOWD I still consider myself a novice with only 16 logged dives, so I am always on the look out for good advice.
Adam
i ve just notice your question and i would like to try giving you an idea:
Let say 15 lit x 300 bar = 4500 / your consumption (normaly arround 20 in calm) it will give you 225 minutes of breathing on surface . Instead of 15 lit cylinder let see the 10 lit 10x300=3000/20=150 minutes on surface breathing thats the different for littres and bars among cylinders.
Let say 15 lit x 300 bar = 4500 / your consumption (normaly arround 20 in calm) it will give you 225 minutes of breathing on surface . Instead of 15 lit cylinder let see the 10 lit 10x300=3000/20=150 minutes on surface breathing thats the different for littres and bars among cylinders.