What PSI for your Evo 2l Bottle Fills?

what2be · 19th April 2007, 04:02

Just curious what some of you are filling your 2l bottles to. I know they are rated at 2400 but I usually fill mine to 3000. I was recently in Cozumel and got a 3800 PSI fill and was suprised the burst disc didnt go. Anyone know what burst discs AP uses on these bottles?

cramerdn · 19th April 2007, 04:32

the bottles I have are 2400 with the + so 2640 is full. I ordered a pair of 3442 bottles from TDL but they have yet to arrive

I am suspecting that I may have to tune the first stages with the higher preasure.

I just replaced a burst disk, (not for bursting) and was surprised that they dont use one piece burst disk assemblies.

**Gill Envy** · 19th April 2007, 04:46

Around here it seems common place to fill them to 3000 psi. 2640 is the official, I believe. I have gotten the distinct feeling though that at least for the o2 side of things the low rating reflects a general philosophy of added caution around 02 and fires more than pure tank safety. An x millitary friend of mine said back in the day they used to fill to 10,000 psi for extreme missions (the tanks were pretty much considered disposible after such a fill, if i'm remembering correctly)... but the filling was done over many hours at an incredibly slow rate.

It's my conclusion that lower pressure is just safer all the way around, I've made friends with it...and since I trans fill from AL 80's, almost all of my fills are slow and progressively low psi (2800-1200). A 3800 lb fill of 02 would put me on the edge, but maybe i'm just paranoid.

camerone · 19th April 2007, 06:08

Quote: (Originally Posted by Gill Envy)

Around here it seems common place to fill them to 3000 psi. 2640 is the official, I believe.

Yup - 2400+ is what the bottles are marked, but I usually fill mine to 3000 (or whenever the Baby Booster stalls out, or I run out of drive gas for the booster.)

YMMV...

grahamsp · 19th April 2007, 22:49

Quote: (Originally Posted by what2be)

Just curious what some of you are filling your 2l bottles to. I know they are rated at 2400 but I usually fill mine to 3000. I was recently in Cozumel and got a 3800 PSI fill and was suprised the burst disc didnt go. Anyone know what burst discs AP uses on these bottles?

Who makes your 2 litre bottles? My Evo came with Faber 2 litre steels (as standard, I thought) rated to 232 bar / 3,364 psi. Or am I missing something?

Graham

decoweenie · 19th April 2007, 23:15

Quote: (Originally Posted by grahamsp)

Who makes your 2 litre bottles?

There might be a difference between the tanks supplied with the units depending if they go to North America or elsewhere.

01RMB · 20th April 2007, 12:20

Quote: (Originally Posted by decoweenie)

There might be a difference between the tanks supplied with the units depending if they go to North America or elsewhere.

The tanks we are getting in Australia are the UK M25 Faber cylinders with no burst disk in the valve. They are not to Aus standards but don't tell anyone!!

The US tanks are supplied from the US 3/4" (SDS not by AP) but AP supply the valves and they have a burst disk.

AP will supply the 3/4" valves to Aus but as they don't supply the 3/4" cylinders you have to find your own and at present there are no 2l steel cylinders Aus approved.

Jason Blackwell · 21st April 2007, 11:24

I saw a set of US Evo cylinders recently, they had 25mm threads WITH a burst disc. I was a new one on me.

Cheers Jason

JD White · 21st April 2007, 12:13

Quote: (Originally Posted by 01RMB)

The tanks we are getting in Australia are the UK M25 Faber cylinders with no burst disk in the valve. They are not to Aus standards but don't tell anyone!!

When I asked if the tanks I got with my Inspo were OK to use in Oz (3L steel stamped to 232 bar), I was told that cylinders under 5L in size were not required to have a burst disc. I was told this by a dive shop who are happy to fill both my cylinders. If this is incorrect please don't tell them!

JD

grahamsp · 22nd April 2007, 03:25

Quote: (Originally Posted by 01RMB)

The tanks we are getting in Australia are the UK M25 Faber cylinders with no burst disk in the valve. They are not to Aus standards but don't tell anyone!!

Actually, they are but not directly.

Evo cylinders comply with BS 5045/7. To comply with AS 2030, a competent independent authority must certify (in a Design Verification Statement) that they really, really are built to BS 5045/7, which of course blind Freddy can see since it's STAMPED ON THE NECK OF THE CYLINDER!!!!!!

Once that's done, the Design Verification Statement can be submitted to Workcover NSW together with a Compliance Statement - I believe this comes from the manufacturer saying the cylinder had been properly designed.

Then, provided all is in order, Worksafe approve the design and issue a number which is then stamped on the cylinder.

Why, I hear you ask? God knows; the process is a complete waste of everybody's time and money. But then, as every Australian knows, too much government is never enough.

Graham

19th April 2007, 04:02	#1 (permalink)
what2be New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Apr 2006 Location: Eureka, Ca Posts: 94	What PSI for your Evo 2l Bottle Fills? Just curious what some of you are filling your 2l bottles to. I know they are rated at 2400 but I usually fill mine to 3000. I was recently in Cozumel and got a 3800 PSI fill and was suprised the burst disc didnt go. Anyone know what burst discs AP uses on these bottles? __________________ "If I die with any money at all in my bank account I know I miscalculated"
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19th April 2007, 04:32	#2 (permalink)
cramerdn Obey my dog! Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Dec 2006 Location: Townsville QLD Posts: 738	Re: What PSI for your Evo 2l Bottle Fills? the bottles I have are 2400 with the + so 2640 is full. I ordered a pair of 3442 bottles from TDL but they have yet to arrive I am suspecting that I may have to tune the first stages with the higher preasure. I just replaced a burst disk, (not for bursting) and was surprised that they dont use one piece burst disk assemblies. __________________ "Its better to live one day as a tiger than an entire life as a worm." "But who's ever heard of a worm skin rug?"
(Online)

19th April 2007, 04:46	#3 (permalink)
Gill Envy Shearwater Copis Divers Current Rebreather/s: Other CCR Other Rebreather/s: Evolution Other CCR Join Date: Nov 2005 Location: seattle Posts: 1,348	Re: What PSI for your Evo 2l Bottle Fills? Around here it seems common place to fill them to 3000 psi. 2640 is the official, I believe. I have gotten the distinct feeling though that at least for the o2 side of things the low rating reflects a general philosophy of added caution around 02 and fires more than pure tank safety. An x millitary friend of mine said back in the day they used to fill to 10,000 psi for extreme missions (the tanks were pretty much considered disposible after such a fill, if i'm remembering correctly)... but the filling was done over many hours at an incredibly slow rate. It's my conclusion that lower pressure is just safer all the way around, I've made friends with it...and since I trans fill from AL 80's, almost all of my fills are slow and progressively low psi (2800-1200). A 3800 lb fill of 02 would put me on the edge, but maybe i'm just paranoid. __________________ Gill Envy ...Because I wasn't born with gills! ><(°>><(°>><(°>><(°>><(°>><(°>><(°>><(°>
(Online)

19th April 2007, 06:08	#4 (permalink)
camerone RBW Member Current Rebreather/s: Evolution Dolphin Other Rebreather/s: Dolphin Join Date: Oct 2005 Location: Seattle, WA Posts: 79	Re: What PSI for your Evo 2l Bottle Fills? Quote: (Originally Posted by Gill Envy) Around here it seems common place to fill them to 3000 psi. 2640 is the official, I believe. Yup - 2400+ is what the bottles are marked, but I usually fill mine to 3000 (or whenever the Baby Booster stalls out, or I run out of drive gas for the booster.) YMMV...
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19th April 2007, 22:49	#5 (permalink)
grahamsp New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Jun 2005 Location: Sydney, Australia Posts: 117	Re: What PSI for your Evo 2l Bottle Fills? Quote: (Originally Posted by what2be) Just curious what some of you are filling your 2l bottles to. I know they are rated at 2400 but I usually fill mine to 3000. I was recently in Cozumel and got a 3800 PSI fill and was suprised the burst disc didnt go. Anyone know what burst discs AP uses on these bottles? Who makes your 2 litre bottles? My Evo came with Faber 2 litre steels (as standard, I thought) rated to 232 bar / 3,364 psi. Or am I missing something? Graham
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19th April 2007, 23:15	#6 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,487	Re: What PSI for your Evo 2l Bottle Fills? Quote: (Originally Posted by grahamsp) Who makes your 2 litre bottles? There might be a difference between the tanks supplied with the units depending if they go to North America or elsewhere. __________________ "...after a while you get bored offering advice to a bull that like to keep butting the fence with its head rather than walking through the open gate..." - Rebreather World PM
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20th April 2007, 12:20	#7 (permalink)
01RMB Evolving Current Rebreather/s: Evolution Other Rebreather/s: Join Date: May 2005 Location: Brisbane, Australia Posts: 193	Re: What PSI for your Evo 2l Bottle Fills? Quote: (Originally Posted by decoweenie) There might be a difference between the tanks supplied with the units depending if they go to North America or elsewhere. The tanks we are getting in Australia are the UK M25 Faber cylinders with no burst disk in the valve. They are not to Aus standards but don't tell anyone!! The US tanks are supplied from the US 3/4" (SDS not by AP) but AP supply the valves and they have a burst disk. AP will supply the 3/4" valves to Aus but as they don't supply the 3/4" cylinders you have to find your own and at present there are no 2l steel cylinders Aus approved. __________________ Cheers Rod
(Online)

21st April 2007, 11:24	#8 (permalink)
Jason Blackwell Bloody Rebreathers! Current Rebreather/s: Inspiration Classic Sport Kiss Optima Dolphin Ray Other Rebreather/s: Not Bought Yet Inspiration Vision Evolution Classic Kiss Dolphin Ray Join Date: Feb 2005 Location: Brisbane, Queensland, AUSTRALIA Posts: 364	Re: What PSI for your Evo 2l Bottle Fills? I saw a set of US Evo cylinders recently, they had 25mm threads WITH a burst disc. I was a new one on me. Cheers Jason __________________ Jason Blackwell TDI Instructor Trainer #1358 Optima...Inspiration/Evolution...KISS...and what is next??? www.divedivedive.com.au OZTeK '09 March 2009 Sydney, Australia www.diveoztek.com.au
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21st April 2007, 12:13	#9 (permalink)
JD White New Member Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Vision Join Date: Aug 2006 Location: Adelaide Posts: 44	Re: What PSI for your Evo 2l Bottle Fills? Quote: (Originally Posted by 01RMB) The tanks we are getting in Australia are the UK M25 Faber cylinders with no burst disk in the valve. They are not to Aus standards but don't tell anyone!! When I asked if the tanks I got with my Inspo were OK to use in Oz (3L steel stamped to 232 bar), I was told that cylinders under 5L in size were not required to have a burst disc. I was told this by a dive shop who are happy to fill both my cylinders. If this is incorrect please don't tell them! JD __________________ Drilling holes is just boring.....
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22nd April 2007, 03:25	#10 (permalink)
grahamsp New Member Current Rebreather/s: Evolution Other Rebreather/s: Join Date: Jun 2005 Location: Sydney, Australia Posts: 117	Re: What PSI for your Evo 2l Bottle Fills? Quote: (Originally Posted by 01RMB) The tanks we are getting in Australia are the UK M25 Faber cylinders with no burst disk in the valve. They are not to Aus standards but don't tell anyone!! Actually, they are but not directly. Evo cylinders comply with BS 5045/7. To comply with AS 2030, a competent independent authority must certify (in a Design Verification Statement) that they really, really are built to BS 5045/7, which of course blind Freddy can see since it's STAMPED ON THE NECK OF THE CYLINDER!!!!!! Once that's done, the Design Verification Statement can be submitted to Workcover NSW together with a Compliance Statement - I believe this comes from the manufacturer saying the cylinder had been properly designed. Then, provided all is in order, Worksafe approve the design and issue a number which is then stamped on the cylinder. Why, I hear you ask? God knows; the process is a complete waste of everybody's time and money. But then, as every Australian knows, too much government is never enough. Graham
(Offline)

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