What max pressure do you boost O2 to?

Sutty · 8th April 2009, 22:18

What maximum pressure are you happy to boost oxygen to?

RichClark · 15th April 2009, 10:58

I selected 200 to 220Bar, but rarely bother boosting that high unless I know I'm multi day diving any won't be able to fill in between.

Rich

**Mark Chase** · 15th April 2009, 11:07

250bar max.

Ill get three dives out of a 250 bar fill with 80-100 bar in reserve. So i fill like this on multi dive gigs. Same for the diluient.

I suspect a lot of 235 bar fillers will be in the 235 bar bracket of your poll and like me some of the 250 bar fillers will fall in the lower section some in the 250-300 section.

It would have been better to say 245 bar +

ATB

colinicky · 15th April 2009, 11:13

250 bar Max but only for multi dive weekends when the unit might stay on the boat & I cann't be bothered to take the ylinders home

***Beanie*** · 15th April 2009, 11:24

Untill I get bored of waiting for it to get pressure or run out of drive gas.

**aainslie** · 15th April 2009, 16:11

There doesn't seem to be much point going beyond 200 bar. That's enough for - oh, I don't know - maybe a 6 hour dive in a 3L? For which you should have a backup plan anyway. And the 7L that I take as backup will last me another... oh, day or so...

Ben Field · 15th April 2009, 17:38

Quote: (Originally Posted by aainslie)

There doesn't seem to be much point going beyond 200 bar. That's enough for - oh, I don't know - maybe a 6 hour dive in a 3L? For which you should have a backup plan anyway. And the 7L that I take as backup will last me another... oh, day or so...

Higher pressure is useful in smaller tanks or if you plan to dive over a weekend/week with little or no access to high pressure O2. One 3ltr pumped to bursting will do the best part of a weeks livaboard diving IME.

My old LDS used to provide "test pressure fills" as I called them, Slow and hot with the hose running on the tank but they did make weekends in some locations possible that otherwise wouldn't be.

Its not big or clever and I wouldn't fill them myself like that (or be within 500mtrs) but the result was handy :)

**aainslie** · 15th April 2009, 19:41

...or you could take a 7L/40 with a whip, and decant a bit. This also gives you a backup on deco. Increase it to a 12/80 and you'd be good for almost a week... buy a booster, and you'd go even longer.

There's no way I'd boost to "test pressures" to save a tiny bit of money/space. There again I do my own fills which changes my risk tolerance.

DWill · 15th April 2009, 21:43

Quote: (Originally Posted by aainslie)

...or you could take a 7L/40 with a whip, and decant a bit.

There you go taking all the excitment out of life again.... :)

divetheworld · 15th April 2009, 22:37

I have about half a dozen 3's sat in the dive shop so multi dive jobs are never short of O2. For normal stuff, 200-220 is sufficient.
For big deco dives I carry a 10ltr side with 100% in so there's never a need to wear out a booster or stress tanks.

View Poll Results: Curious what pressure people will boost O2 to
<150Bar (<2250PSI)	3	2.17%
150 to 180Bar (2250 to 2700PSI)	5	3.62%
180 to 200Bar (2700 to 3000PSI)	21	15.22%
200 to 220Bar (3000 to 3300PSI)	63	45.65%
220 to 250Bar (3300 to 3750PSI)	33	23.91%
250 to 300Bar (3750 to 4500PSI)	10	7.25%
>300Bar (>4500PSI)	3	2.17%
Voters: 138. You may not vote on this poll

8th April 2009, 22:18	#1 (permalink)
Sutty Classic Kiss diver Classic Kiss 165 Join Date: Jun 2005 Location: Glossop, Derbyshire, UK Posts: 1,033	What max pressure do you boost O2 to? What maximum pressure are you happy to boost oxygen to?
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15th April 2009, 10:58	#2 (permalink)
RichClark Classic KISS No. 226 Classic KISS w. Shearwater GF Join Date: Mar 2005 Location: Hove, UK Posts: 881	Re: What max pressure do you boost O2 to? I selected 200 to 220Bar, but rarely bother boosting that high unless I know I'm multi day diving any won't be able to fill in between. Rich
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15th April 2009, 11:07	#3 (permalink)
Mark Chase So many CCR So little etc Join Date: Jan 2005 Location: Kent Posts: 3,669	Re: What max pressure do you boost O2 to? 250bar max. Ill get three dives out of a 250 bar fill with 80-100 bar in reserve. So i fill like this on multi dive gigs. Same for the diluient. I suspect a lot of 235 bar fillers will be in the 235 bar bracket of your poll and like me some of the 250 bar fillers will fall in the lower section some in the 250-300 section. It would have been better to say 245 bar + ATB __________________ See my "Doing It Chasey" video where I'm locked into a padded room, naked, with two ball bearings and within an Hour, I manage to lose one and break the other!!! Kevin Juergensen 16/11/08 [/quote]
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15th April 2009, 11:13	#4 (permalink)
colinicky RBW Member Join Date: Mar 2005 Location: uk Posts: 918	Re: What max pressure do you boost O2 to? 250 bar Max but only for multi dive weekends when the unit might stay on the boat & I cann't be bothered to take the ylinders home
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15th April 2009, 11:24	#5 (permalink)
*Beanie* Gallery Administrator Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,564	Re: What max pressure do you boost O2 to? Untill I get bored of waiting for it to get pressure or run out of drive gas. __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk Blog My iStockPhoto www.beandiving.co.uk www.beanengineering.co.uk www.bubbleless.co.uk www.happyfood.org.uk My eBay Listings www.cirencestercupcakes.co.uk
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15th April 2009, 16:11	#6 (permalink)
aainslie So Cal Tech Diver Join Date: Apr 2006 Location: LA Posts: 589	Re: What max pressure do you boost O2 to? There doesn't seem to be much point going beyond 200 bar. That's enough for - oh, I don't know - maybe a 6 hour dive in a 3L? For which you should have a backup plan anyway. And the 7L that I take as backup will last me another... oh, day or so... __________________ Andrew Ainslie www.asainslie.com
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15th April 2009, 17:38	#7 (permalink)
Ben Field CK+Shearwater Classic KISS Sport KISS Join Date: Aug 2005 Location: Weymouth, England Posts: 2,275	Re: What max pressure do you boost O2 to? Quote: (Originally Posted by aainslie) There doesn't seem to be much point going beyond 200 bar. That's enough for - oh, I don't know - maybe a 6 hour dive in a 3L? For which you should have a backup plan anyway. And the 7L that I take as backup will last me another... oh, day or so... Higher pressure is useful in smaller tanks or if you plan to dive over a weekend/week with little or no access to high pressure O2. One 3ltr pumped to bursting will do the best part of a weeks livaboard diving IME. My old LDS used to provide "test pressure fills" as I called them, Slow and hot with the hose running on the tank but they did make weekends in some locations possible that otherwise wouldn't be. Its not big or clever and I wouldn't fill them myself like that (or be within 500mtrs) but the result was handy :) __________________ www.hugsac.org.uk
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15th April 2009, 19:41	#8 (permalink)
aainslie So Cal Tech Diver Join Date: Apr 2006 Location: LA Posts: 589	Re: What max pressure do you boost O2 to? ...or you could take a 7L/40 with a whip, and decant a bit. This also gives you a backup on deco. Increase it to a 12/80 and you'd be good for almost a week... buy a booster, and you'd go even longer. There's no way I'd boost to "test pressures" to save a tiny bit of money/space. There again I do my own fills which changes my risk tolerance. __________________ Andrew Ainslie www.asainslie.com
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15th April 2009, 21:43	#9 (permalink)
DWill New Moderator, Play Nice! Join Date: Apr 2008 Location: CA & ID Posts: 848	Re: What max pressure do you boost O2 to? Quote: (Originally Posted by aainslie) ...or you could take a 7L/40 with a whip, and decant a bit. There you go taking all the excitment out of life again.... :)
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15th April 2009, 22:37	#10 (permalink)
divetheworld Dive porn pimp Custom UT-240 and 11 others inc. two APOC's Join Date: Mar 2005 Location: Prescot, England Posts: 2,036	Re: What max pressure do you boost O2 to? I have about half a dozen 3's sat in the dive shop so multi dive jobs are never short of O2. For normal stuff, 200-220 is sufficient. For big deco dives I carry a 10ltr side with 100% in so there's never a need to wear out a booster or stress tanks. __________________ Attitude and self praise is no reccomendation. Dont try to be a great man, just be a man and let history be the judge of you. *WWW.NARKEDAT90.CO.UK* The Technical Dive Equipment and Computer Specialists. If we don't make it, ask us to!
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