Luxfer 7L

JAG · November 30th, 2005, 10:33 PM

All,

Had a rake through the threads and t'interweb but can't find the buoyancy characteristics for the above mentioned cylinder for full, half full and empty in fresh and salt water. Could anyone possibly point me in the right direction please?

Many thanks,

Ian

Divingniknaks · November 30th, 2005, 11:24 PM

http://www.luxfercylinders.com/produ...s/europe.shtml

Should do you I think.

Cheers

**Alastair** · November 30th, 2005, 11:33 PM

There is also Greg's tool:

http://www.subaqua.co.uk/cgi-bin/cylinder-buoyancy.cgi

Cheers
Al

Divingniknaks · November 30th, 2005, 11:35 PM

Good one Al, I'd forgotten that.

It doesn't make it clear for the 7 though which "style" it is, old or new, or do you know ?

jluttichau · November 30th, 2005, 11:41 PM

Quote: (Originally Posted by Divingniknaks)

http://www.luxfercylinders.com/produ...s/europe.shtml

Should do you I think.

Be aware that the bottles listen under Europe are not the CE approved ones sold by deepstop etc.

Cheers
Jonas

**Alastair** · November 30th, 2005, 11:41 PM

Don't know, guess old style as the sites been going ages - theoretically you can get the weight off the stamp on the cylinder and work it out from there.

It's worth bearing in mind that the valve and 1st stage both add to the weight somewhat.

Cheers
Al

Divingniknaks · November 30th, 2005, 11:53 PM

Quote: (Originally Posted by jluttichau)

Be aware that the bottles listen under Europe are not the CE approved ones sold by deepstop etc.

Cheers
Jonas

Not sure I understand what you mean ?

Sorry Jonas it's been a long day

Andrew Bryson · December 1st, 2005, 12:03 AM

Quote: (Originally Posted by JAG)

All,

Had a rake through the threads and t'interweb but can't find the buoyancy characteristics for the above mentioned cylinder for full, half full and empty in fresh and salt water. Could anyone possibly point me in the right direction please?

Many thanks,

Ian

I don't have the weight figure for a 'new' Luxfer 7L on me (too lazy to head out to the garage and look!), but here's some photos showing a 'new' in salt water (see file names for the pressure levels in the cylinder). There's a DS4 with ATX 50 connected to it. As you can see it's not positive, though it may give that impression when clipped to you due to the tail being so light at that pressure. Obviously the 7L Al is the yellow one

andy

JAG · December 1st, 2005, 10:56 AM

Quote: (Originally Posted by Alastair)

There is also Greg's tool:

http://www.subaqua.co.uk/cgi-bin/cylinder-buoyancy.cgi

Cheers
Al

Cheers Al. Much appreciated.

JAG · December 1st, 2005, 10:59 AM

Quote: (Originally Posted by Andrew Bryson)

I don't have the weight figure for a 'new' Luxfer 7L on me (too lazy to head out to the garage and look!), but here's some photos showing a 'new' in salt water (see file names for the pressure levels in the cylinder). There's a DS4 with ATX 50 connected to it. As you can see it's not positive, though it may give that impression when clipped to you due to the tail being so light at that pressure. Obviously the 7L Al is the yellow one

andy

Thanks Andrew.
Pictures speak a thousand words!
For what it's worth my cylinder is a UK CE marked 7L and is stamped with 9.9kg.

Cheers,

Ian

November 30th, 2005, 10:33 PM	#1 (permalink)
JAG(Offline) New Member Join Date: Nov 2005 Location: Essex Posts: 130	Luxfer 7L All, Had a rake through the threads and t'interweb but can't find the buoyancy characteristics for the above mentioned cylinder for full, half full and empty in fresh and salt water. Could anyone possibly point me in the right direction please? Many thanks, Ian __________________ -.. .. ...- . / ... .- ..-. . / ... .... .. .--. -- .- - . ... www.narknark.co.uk

November 30th, 2005, 11:24 PM	#2 (permalink)
Divingniknaks(Offline) Resident purveyor of shiney kit.... Join Date: Nov 2005 Location: Midlands UK Posts: 1,038	http://www.luxfercylinders.com/produ...s/europe.shtml Should do you I think. Cheers __________________ Phill ----------------------------- Salvo Lights, DirZone Gear , Frog Wings Dive ? http://www.divingniknaks.com

November 30th, 2005, 11:33 PM	#3 (permalink)
Alastair(Offline) DIRX Supporter Join Date: Nov 2005 Location: UK Posts: 693	There is also Greg's tool: http://www.subaqua.co.uk/cgi-bin/cylinder-buoyancy.cgi Cheers Al __________________ Helium is our friend - GI3

November 30th, 2005, 11:35 PM	#4 (permalink)
Divingniknaks(Offline) Resident purveyor of shiney kit.... Join Date: Nov 2005 Location: Midlands UK Posts: 1,038	Good one Al, I'd forgotten that. It doesn't make it clear for the 7 though which "style" it is, old or new, or do you know ? __________________ Phill ----------------------------- Salvo Lights, DirZone Gear , Frog Wings Dive ? http://www.divingniknaks.com

November 30th, 2005, 11:41 PM	#6 (permalink)
Alastair(Offline) DIRX Supporter Join Date: Nov 2005 Location: UK Posts: 693	Don't know, guess old style as the sites been going ages - theoretically you can get the weight off the stamp on the cylinder and work it out from there. It's worth bearing in mind that the valve and 1st stage both add to the weight somewhat. Cheers Al __________________ Helium is our friend - GI3

November 30th, 2005, 11:41 PM	#5 (permalink)
jluttichau(Offline) Custom User Title Join Date: Nov 2005 Location: Denmark Posts: 437	Quote: (Originally Posted by Divingniknaks) http://www.luxfercylinders.com/produ...s/europe.shtml Should do you I think. Be aware that the bottles listen under Europe are not the CE approved ones sold by deepstop etc. Cheers Jonas

November 30th, 2005, 11:53 PM	#7 (permalink)
Divingniknaks(Offline) Resident purveyor of shiney kit.... Join Date: Nov 2005 Location: Midlands UK Posts: 1,038	Quote: (Originally Posted by jluttichau) Be aware that the bottles listen under Europe are not the CE approved ones sold by deepstop etc. Cheers Jonas Not sure I understand what you mean ? Sorry Jonas it's been a long day __________________ Phill ----------------------------- Salvo Lights, DirZone Gear , Frog Wings Dive ? http://www.divingniknaks.com

December 1st, 2005, 12:03 AM	#8 (permalink)
Andrew Bryson(Offline) New Member Join Date: Nov 2005 Location: Abingdon Posts: 315	Quote: (Originally Posted by JAG) All, Had a rake through the threads and t'interweb but can't find the buoyancy characteristics for the above mentioned cylinder for full, half full and empty in fresh and salt water. Could anyone possibly point me in the right direction please? Many thanks, Ian I don't have the weight figure for a 'new' Luxfer 7L on me (too lazy to head out to the garage and look!), but here's some photos showing a 'new' in salt water (see file names for the pressure levels in the cylinder). There's a DS4 with ATX 50 connected to it. As you can see it's not positive, though it may give that impression when clipped to you due to the tail being so light at that pressure. Obviously the 7L Al is the yellow one andy Last edited by Andrew Bryson; December 1st, 2005 at 12:16 AM.

December 1st, 2005, 10:56 AM	#9 (permalink)
JAG(Offline) New Member Join Date: Nov 2005 Location: Essex Posts: 130	Quote: (Originally Posted by Alastair) There is also Greg's tool: http://www.subaqua.co.uk/cgi-bin/cylinder-buoyancy.cgi Cheers Al Cheers Al. Much appreciated. __________________ -.. .. ...- . / ... .- ..-. . / ... .... .. .--. -- .- - . ... www.narknark.co.uk

December 1st, 2005, 10:59 AM	#10 (permalink)
JAG(Offline) New Member Join Date: Nov 2005 Location: Essex Posts: 130	Quote: (Originally Posted by Andrew Bryson) I don't have the weight figure for a 'new' Luxfer 7L on me (too lazy to head out to the garage and look!), but here's some photos showing a 'new' in salt water (see file names for the pressure levels in the cylinder). There's a DS4 with ATX 50 connected to it. As you can see it's not positive, though it may give that impression when clipped to you due to the tail being so light at that pressure. Obviously the 7L Al is the yellow one andy Thanks Andrew. Pictures speak a thousand words! For what it's worth my cylinder is a UK CE marked 7L and is stamped with 9.9kg. Cheers, Ian __________________ -.. .. ...- . / ... .- ..-. . / ... .... .. .--. -- .- - . ... www.narknark.co.uk