Decanting into an A-clamp tin...from a DIN whip?

Mdemon · 20th June 2005, 20:44

OK, here's the problem. I've got two lovely Ally 80's that I need to fill. Only they're from Saudi and have an A-clamp valve. And a DIN valve won't go in - I guess the thread is imperial or something (weird as it is an Aqualung valve), it's too narrow.

So, I want to fill them for bailout by partial pressure. Only my whip is bullnose/DIN to DIN...

I have a box of A-clamp and DIN first stages, lots of hoses and bits and bobs, twinsets etc. Any ideas how I can bodge something to allow me to decant into them?

(No diveshops or buying expensive adapters allowed!)

TechBlue · 20th June 2005, 21:00

Don't you have a Din to Yoke (A frame) adapter laying around or is that considered an expensive adapter

Andy M · 20th June 2005, 21:10

Quote: (Originally Posted by Mdemon)

OK, here's the problem. I've got two lovely Ally 80's that I need to fill. Only they're from Saudi and have an A-clamp valve. And a DIN valve won't go in - I guess the thread is imperial or something

Does it look like 3/4 BSP? your best bet long term is probably to replace the cylinder valves with DIN ones. Safer and all that.

Mdemon · 20th June 2005, 21:12

Nice try!

Nope, that counts as an expensive adaptor as I don't have one...

Unless you count the Buddy crack bottle...

Hmmm...

(I tried a straight swap with a DIN valve and it tightened up too much about 4 threads from the end. The O-ring was very loose on it too, so there is a size difference...

)

ROB DAVIE · 20th June 2005, 23:11

Quote: (Originally Posted by Mdemon)

OK, here's the problem. I've got two lovely Ally 80's that I need to fill. Only they're from Saudi and have an A-clamp valve. And a DIN valve won't go in - I guess the thread is imperial or something (weird as it is an Aqualung valve), it's too narrow.

Do you have a thread gauge to give us a measurement with?

R

Andy M · 20th June 2005, 23:30

Quote: (Originally Posted by Mdemon)

(I tried a straight swap with a DIN valve and it tightened up too much about 4 threads from the end. The O-ring was very loose on it too, so there is a size difference...

Have you seen the results when someone does that? A valveless 7 litre cylinder came flying out the door and across the car park at Deep Blue in Plymouth, narrowly missing one of our club members who was carrying some cylinders in for a fill. This was bank holiday weekend this year. Mixing threads on cylinders is really dangerous!

Just had a thought - Does the cylinder say DOT-3AL on the side? in which case, it is a 3/4 NPS thread.

Barrie Law · 20th June 2005, 23:44

I hope I'm not stating the obvious but if your doing partial pressure filling your cylinders must be 02 clean.
I would echo what was already mentioned and say when you have the valves out for cleaning the cylinders replace valves with Din Valves, cost approx 20 stg each??
The valve thread size should be on the neck of the cylinder, let me know what they are and I might have a couple lying around if you have a need to get this done for nothing??

Cheers
Barrie

***Beanie*** · 21st June 2005, 08:29

Quote: (Originally Posted by Barrie Law)

I hope I'm not stating the obvious but if your doing partial pressure filling your cylinders must be 02 clean.
I would echo what was already mentioned and say when you have the valves out for cleaning the cylinders replace valves with Din Valves, cost approx 20 stg each??
The valve thread size should be on the neck of the cylinder, let me know what they are and I might have a couple lying around if you have a need to get this done for nothing??

Cheers
Barrie

Don't encourage him!

John buy some cylinders that where made within the last millenium

Mdemon · 21st June 2005, 10:57

Quote:

Does the cylinder say DOT-3AL on the side? in which case, it is a 3/4 NPS thread.

It does and it is...

The tins were hydro'd (V+) and O2 cleaned and then left with 50bar in them for a couple of years so I'm happy they are OK. Looked immaculate inside...

I don't think a bodge is going to do it...

Thanks for your help anyway...

So, expensive conversion it is! Still, £25 is cheaper than 2 x DIN valves - do they make them for 3/4 NPS? Thanks for the offer Barrie but I guess yours are metric?

Cheers all!

John
"Tighter than 2 coats of paint..."

Andy M · 21st June 2005, 11:03

Quote: (Originally Posted by Mdemon)

2 x DIN valves - do they make them for 3/4 NPS?

Yes, you need to get them from the USA. Techblue or someone should be able to supply them for you.

20th June 2005, 20:44	#1 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,906	Decanting into an A-clamp tin...from a DIN whip? OK, here's the problem. I've got two lovely Ally 80's that I need to fill. Only they're from Saudi and have an A-clamp valve. And a DIN valve won't go in - I guess the thread is imperial or something (weird as it is an Aqualung valve), it's too narrow. So, I want to fill them for bailout by partial pressure. Only my whip is bullnose/DIN to DIN... I have a box of A-clamp and DIN first stages, lots of hoses and bits and bobs, twinsets etc. Any ideas how I can bodge something to allow me to decant into them? (No diveshops or buying expensive adapters allowed!) __________________ www.southwestmafia.com "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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20th June 2005, 21:00	#2 (permalink)
TechBlue RebreatherWorld Sponsor Current Rebreather/s: Inspiration Classic Classic Kiss Other CCR Other Rebreather/s: Inspiration Classic Inspiration Vision Evolution Megalodon Optima Other CCR Join Date: Apr 2005 Location: Costa del Sol, Spain Posts: 212	Don't you have a Din to Yoke (A frame) adapter laying around or is that considered an expensive adapter __________________ Cheers, Chris www.tech-blue.com The site dedicated to Rebreather and Technical diving "We only sell what we dive"
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20th June 2005, 21:10	#3 (permalink)
Andy M Dude Current Rebreather/s: Home Build Other Rebreather/s: Sport Kiss Home Build Join Date: Mar 2005 Location: Cambridge, UK Posts: 415	Quote: (Originally Posted by Mdemon) OK, here's the problem. I've got two lovely Ally 80's that I need to fill. Only they're from Saudi and have an A-clamp valve. And a DIN valve won't go in - I guess the thread is imperial or something Does it look like 3/4 BSP? your best bet long term is probably to replace the cylinder valves with DIN ones. Safer and all that. __________________ Know your PO2 at all times
(Offline)

20th June 2005, 21:12	#4 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,906	Nice try! Nope, that counts as an expensive adaptor as I don't have one... Unless you count the Buddy crack bottle... Hmmm... (I tried a straight swap with a DIN valve and it tightened up too much about 4 threads from the end. The O-ring was very loose on it too, so there is a size difference... ) __________________ www.southwestmafia.com "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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20th June 2005, 23:11	#5 (permalink)
ROB DAVIE Administrator Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Feb 2005 Location: HOUSTON, REPUBLIC OF TEJAS Posts: 1,120	Quote: (Originally Posted by Mdemon) OK, here's the problem. I've got two lovely Ally 80's that I need to fill. Only they're from Saudi and have an A-clamp valve. And a DIN valve won't go in - I guess the thread is imperial or something (weird as it is an Aqualung valve), it's too narrow. Do you have a thread gauge to give us a measurement with? R
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20th June 2005, 23:30	#6 (permalink)
Andy M Dude Current Rebreather/s: Home Build Other Rebreather/s: Sport Kiss Home Build Join Date: Mar 2005 Location: Cambridge, UK Posts: 415	Quote: (Originally Posted by Mdemon) (I tried a straight swap with a DIN valve and it tightened up too much about 4 threads from the end. The O-ring was very loose on it too, so there is a size difference... Have you seen the results when someone does that? A valveless 7 litre cylinder came flying out the door and across the car park at Deep Blue in Plymouth, narrowly missing one of our club members who was carrying some cylinders in for a fill. This was bank holiday weekend this year. Mixing threads on cylinders is really dangerous! Just had a thought - Does the cylinder say DOT-3AL on the side? in which case, it is a 3/4 NPS thread. __________________ Know your PO2 at all times
(Offline)

20th June 2005, 23:44	#7 (permalink)
Barrie Law RebreatherWorld Sponsor Current Rebreather/s: Inspiration Classic Other Rebreather/s: Join Date: Jun 2005 Location: Ireland Posts: 726	Decanting into an A-clamp I hope I'm not stating the obvious but if your doing partial pressure filling your cylinders must be 02 clean. I would echo what was already mentioned and say when you have the valves out for cleaning the cylinders replace valves with Din Valves, cost approx 20 stg each?? The valve thread size should be on the neck of the cylinder, let me know what they are and I might have a couple lying around if you have a need to get this done for nothing?? Cheers Barrie
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21st June 2005, 08:29	#8 (permalink)
*Beanie* Close to that red button Current Rebreather/s: Inspiration Classic Other Rebreather/s: Inspiration Vision Join Date: Jan 2005 Location: In da house! yeah baby! Posts: 3,207	Quote: (Originally Posted by Barrie Law) I hope I'm not stating the obvious but if your doing partial pressure filling your cylinders must be 02 clean. I would echo what was already mentioned and say when you have the valves out for cleaning the cylinders replace valves with Din Valves, cost approx 20 stg each?? The valve thread size should be on the neck of the cylinder, let me know what they are and I might have a couple lying around if you have a need to get this done for nothing?? Cheers Barrie Don't encourage him! John buy some cylinders that where made within the last millenium __________________ Beanie Gallery Admin & Library Assistant. www.outlawdivers.org.uk www.beandiving.co.uk www.beanengineering.co.uk www.divelife.co.uk
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21st June 2005, 10:57	#9 (permalink)
Mdemon SiegeEngine II Current Rebreather/s: Inspiration Classic Home Build Other Rebreather/s: Inspiration Classic Home Build Join Date: Feb 2007 Location: SWUK Posts: 1,906	Quote: Does the cylinder say DOT-3AL on the side? in which case, it is a 3/4 NPS thread. It does and it is... The tins were hydro'd (V+) and O2 cleaned and then left with 50bar in them for a couple of years so I'm happy they are OK. Looked immaculate inside... I don't think a bodge is going to do it... Thanks for your help anyway... So, expensive conversion it is! Still, £25 is cheaper than 2 x DIN valves - do they make them for 3/4 NPS? Thanks for the offer Barrie but I guess yours are metric? Cheers all! John "Tighter than 2 coats of paint..." __________________ www.southwestmafia.com "Once the agenda-monkeys and perfect-worlders have moved on, perhaps we can do some diving?"
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21st June 2005, 11:03	#10 (permalink)
Andy M Dude Current Rebreather/s: Home Build Other Rebreather/s: Sport Kiss Home Build Join Date: Mar 2005 Location: Cambridge, UK Posts: 415	Quote: (Originally Posted by Mdemon) 2 x DIN valves - do they make them for 3/4 NPS? Yes, you need to get them from the USA. Techblue or someone should be able to supply them for you. __________________ Know your PO2 at all times
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