Decanting calculation

JohnDuncan · 22nd April 2007, 17:27

I hope someone can help me with a formula for decanting into another cylinder. I tried to look through my TDI manual but didnt find anything, so how do I work out the BAR drop in pressure in my supply cylinder for a known amount wanted in the diving cylinder I am decanting into? this is so that I can work out if i have enough supply gas for mixing Heliar (for instance) and then I know before starting that I have enough He to mix a couple of 3 litres with 19% heliar

Gobfish1 · 22nd April 2007, 17:34

Quote: (Originally Posted by JohnDuncan)

I hope someone can help me with a formula for decanting into another cylinder. I tried to look through my TDI manual but didnt find anything, so how do I work out the BAR drop in pressure in my supply cylinder for a known amount wanted in the diving cylinder I am decanting into? this is so that I can work out if i have enough supply gas for mixing Heliar (for instance) and then I know before starting that I have enough He to mix a couple of 3 litres with 19% heliar

sorry m8 but if you cant work it out , dont think you should be diving a mix ,
its kids stuff and a good sport diver would run ring round you ,

cisatlantic you may find some thing to help you

JohnDuncan · 22nd April 2007, 17:37

Quote: (Originally Posted by Gobfish1)

sorry m8 but if you cant work it out , dont think you should be diving a mix ,
its kids stuff and a good sport diver would run ring round you ,

cisatlantic you may find some think to help you

what i expect from a mancunian, thanks mate!

Jon Adams · 22nd April 2007, 17:49

Quote: (Originally Posted by Gobfish1)

sorry m8 but if you cant work it out , dont think you should be diving a mix ,
its kids stuff and a good sport diver would run ring round you ,

cisatlantic you may find some think to help you

Yet another aloof response !!!!! Wow you managed that all by yourself without any help from your alto ego ! it must be great to be so knowledgeable

Jon

Gobfish1 · 22nd April 2007, 17:58

Quote: (Originally Posted by Jon Adams)

Yet another aloof response !!!!! Wow you managed that all by yourself without any help from your alto ego ! it must be great to be so knowledgeable

Jon

alto ego , me ha ah ah

Gobfish1 · 22nd April 2007, 18:00

Quote: (Originally Posted by JohnDuncan)

what i expect from a mancunian, thanks mate!

sorry you feel that way, forget the tdi book
look back at your sport s diver book ,

the link i gave you will sort you
this one blow is a good start ,

http://www.cisatlantic.com/trimix/files/v32P.zi

look be for you gob off ,
cos us mancs are mad for it dont you know ,

JohnDuncan · 22nd April 2007, 18:01

I know that I need 132litres of gas for a 17% heliair (He to 44BAR in a 3 litre) so I know that if I then divide 132 by the volume of my supply cylinder then that is what the BAR will drop by. All in wanted to know is how do I express that working out in a formula, algebra never was my best subject at school.

p.s. If I am wrong in my calculations, it may be because I use a computer based program to work out the blending and I have forgotten the calculation. If that upsets one of the "self-appointed Dive Gods" on the website, TOUGH!

Gobfish1 · 22nd April 2007, 18:03

Quote: (Originally Posted by Jon Adams)

Yet another aloof response !!!!! Wow you managed that all by yourself without any help from your alto ego ! it must be great to be so knowledgeable

Jon

aloof now you are taking the piss ha ha ha

**nigelh** · 22nd April 2007, 18:25

Quote: (Originally Posted by JohnDuncan)

I hope someone can help me with a formula for decanting into another cylinder. I tried to look through my TDI manual but didnt find anything, so how do I work out the BAR drop in pressure in my supply cylinder for a known amount wanted in the diving cylinder I am decanting into?

If you are blending may I recomend a calculator.
Mine are here but there are lots of others just as good or better.
HTH

Jon Adams · 22nd April 2007, 18:28

Quote: (Originally Posted by Gobfish1)

aloof now you are taking the piss ha ha ha

Probably

but thats enough for me

J

22nd April 2007, 17:27	#1 (permalink)
JohnDuncan Custom Title Allowed! Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Aug 2005 Location: Bristol, United Kingdom Posts: 134	Decanting calculation I hope someone can help me with a formula for decanting into another cylinder. I tried to look through my TDI manual but didnt find anything, so how do I work out the BAR drop in pressure in my supply cylinder for a known amount wanted in the diving cylinder I am decanting into? this is so that I can work out if i have enough supply gas for mixing Heliar (for instance) and then I know before starting that I have enough He to mix a couple of 3 litres with 19% heliar __________________ Classic KISS 014 and Shearwater GF
(Offline)

22nd April 2007, 17:34	#2 (permalink)
Gobfish1 Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Apr 2005 Location: Manchester UK Posts: 363	Re: Decanting calculation Quote: (Originally Posted by JohnDuncan) I hope someone can help me with a formula for decanting into another cylinder. I tried to look through my TDI manual but didnt find anything, so how do I work out the BAR drop in pressure in my supply cylinder for a known amount wanted in the diving cylinder I am decanting into? this is so that I can work out if i have enough supply gas for mixing Heliar (for instance) and then I know before starting that I have enough He to mix a couple of 3 litres with 19% heliar sorry m8 but if you cant work it out , dont think you should be diving a mix , its kids stuff and a good sport diver would run ring round you , cisatlantic you may find some thing to help you __________________ Steve G Apparently not the only gay diver in the village http://drinkingliberally.org/blogs/o...nzee-glock.gif http://www.scubatunes.com/audio/vol01/mp3/HiTech.mp3 Last edited by Gobfish1 : 22nd April 2007 at 18:04.
(Offline)

22nd April 2007, 17:37	#3 (permalink)
JohnDuncan Custom Title Allowed! Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Aug 2005 Location: Bristol, United Kingdom Posts: 134	Re: Decanting calculation Quote: (Originally Posted by Gobfish1) sorry m8 but if you cant work it out , dont think you should be diving a mix , its kids stuff and a good sport diver would run ring round you , cisatlantic you may find some think to help you what i expect from a mancunian, thanks mate! __________________ Classic KISS 014 and Shearwater GF
(Offline)

22nd April 2007, 17:49	#4 (permalink)
Jon Adams New Member Current Rebreather/s: Inspiration Classic Ouroboros Other Rebreather/s: Inspiration Classic MK 15.X Ouroboros Join Date: Jul 2005 Posts: 37	Re: Decanting calculation Quote: (Originally Posted by Gobfish1) sorry m8 but if you cant work it out , dont think you should be diving a mix , its kids stuff and a good sport diver would run ring round you , cisatlantic you may find some think to help you Yet another aloof response !!!!! Wow you managed that all by yourself without any help from your alto ego ! it must be great to be so knowledgeable Jon
(Offline)

22nd April 2007, 17:58	#5 (permalink)
Gobfish1 Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Apr 2005 Location: Manchester UK Posts: 363	Re: Decanting calculation Quote: (Originally Posted by Jon Adams) Yet another aloof response !!!!! Wow you managed that all by yourself without any help from your alto ego ! it must be great to be so knowledgeable Jon alto ego , me ha ah ah __________________ Steve G Apparently not the only gay diver in the village http://drinkingliberally.org/blogs/o...nzee-glock.gif http://www.scubatunes.com/audio/vol01/mp3/HiTech.mp3
(Offline)

22nd April 2007, 18:00	#6 (permalink)
Gobfish1 Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Apr 2005 Location: Manchester UK Posts: 363	Re: Decanting calculation Quote: (Originally Posted by JohnDuncan) what i expect from a mancunian, thanks mate! sorry you feel that way, forget the tdi book look back at your sport s diver book , the link i gave you will sort you this one blow is a good start , http://www.cisatlantic.com/trimix/files/v32P.zi look be for you gob off , cos us mancs are mad for it dont you know , __________________ Steve G Apparently not the only gay diver in the village http://drinkingliberally.org/blogs/o...nzee-glock.gif http://www.scubatunes.com/audio/vol01/mp3/HiTech.mp3 Last edited by Gobfish1 : 22nd April 2007 at 18:04.
(Offline)

22nd April 2007, 18:01	#7 (permalink)
JohnDuncan Custom Title Allowed! Current Rebreather/s: Classic Kiss Other Rebreather/s: Join Date: Aug 2005 Location: Bristol, United Kingdom Posts: 134	Re: Decanting calculation I know that I need 132litres of gas for a 17% heliair (He to 44BAR in a 3 litre) so I know that if I then divide 132 by the volume of my supply cylinder then that is what the BAR will drop by. All in wanted to know is how do I express that working out in a formula, algebra never was my best subject at school. p.s. If I am wrong in my calculations, it may be because I use a computer based program to work out the blending and I have forgotten the calculation. If that upsets one of the "self-appointed Dive Gods" on the website, TOUGH! __________________ Classic KISS 014 and Shearwater GF
(Offline)

22nd April 2007, 18:03	#8 (permalink)
Gobfish1 Custom Title Allowed! Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Join Date: Apr 2005 Location: Manchester UK Posts: 363	Re: Decanting calculation Quote: (Originally Posted by Jon Adams) Yet another aloof response !!!!! Wow you managed that all by yourself without any help from your alto ego ! it must be great to be so knowledgeable Jon aloof now you are taking the piss ha ha ha __________________ Steve G Apparently not the only gay diver in the village http://drinkingliberally.org/blogs/o...nzee-glock.gif http://www.scubatunes.com/audio/vol01/mp3/HiTech.mp3
(Offline)

22nd April 2007, 18:25	#9 (permalink)
nigelh New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Classic Other CCR Join Date: Mar 2005 Location: Brighton, Sussex, UK Posts: 838	Re: Decanting calculation Quote: (Originally Posted by JohnDuncan) I hope someone can help me with a formula for decanting into another cylinder. I tried to look through my TDI manual but didnt find anything, so how do I work out the BAR drop in pressure in my supply cylinder for a known amount wanted in the diving cylinder I am decanting into? If you are blending may I recomend a calculator. Mine are here but there are lots of others just as good or better. HTH __________________ nigelh Last edited by nigelh : 22nd April 2007 at 18:31.
(Offline)

22nd April 2007, 18:28	#10 (permalink)
Jon Adams New Member Current Rebreather/s: Inspiration Classic Ouroboros Other Rebreather/s: Inspiration Classic MK 15.X Ouroboros Join Date: Jul 2005 Posts: 37	Re: Decanting calculation Quote: (Originally Posted by Gobfish1) aloof now you are taking the piss ha ha ha Probably but thats enough for me J
(Offline)

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

LinkBacks (?) LinkBack to this Thread: http://www.rebreatherworld.com/compressors-blending-mixing-and-booster-pumps/11420-decanting-calculation.html
Posted By	For	Type	Date
Compressors, Blending / Mixing and Booster Pumps [Archive] - Page 2 - Rebreather World Forums	This thread	Refback	30th June 2007 07:46
Decanting calculation - Page 2 - Rebreather World Forums	This thread	Refback	22nd April 2007 23:49