Is G 5/8" threat fully interchangeable with Std SCUBA DIN thread ??

DanDunfee · 27th June 2007, 21:54

Can anyone please confirm, with certanty, whether the European G 5/8" thread is fully interchangeable with, what's generally known in the US as, a Std SCUBA DIN thread.?? If yes, is the G 5/8" thread a 200 Bar or 300 Bar thread ??

Thanks in advance for confirmation.

Dan

Stephane · 27th June 2007, 22:00

Hello Dan,

Scuba DIN thread is G5/8". Whether it's 200 or 300 bars, it's the length of the thread that differs.

**Dinspiration** · 28th June 2007, 08:43

Hi,

Important are the possible 200 and 300 bar G5/8 DIN combinations:

First Stage Tank Valve Possible
200 bar 200 bar Yes
200 bar 300 bar No
300 bar 200 bar Yes
300 bar 300 bar Yes

DINspiration

Gibbon · 28th June 2007, 11:55

Quote: (Originally Posted by Dinspiration)

Hi,

Important are the possible 200 and 300 bar G5/8 DIN combinations:

First Stage Tank Valve Possible
200 bar 200 bar Yes
200 bar 300 bar No
300 bar 200 bar Yes
300 bar 300 bar Yes

DINspiration

Not stictly true, AFAIK if there is a long nipple on a 300BAR reg or more commonly filling whip then it will bottom out in a 232BAR cylinder prior to a seal being made - the idea being that you cannot connect the 300BAR hose to a 232 BAR cylinder, but many 300BAR regs/whips will work fine in 232BAR DIN cylinders.

232BAR regs cannot get far enough into the valve to get a seal with the O-Ring.

The difference between 300 and 232 BAR is the 7 or 5 threads respectively they are both parallel 5/8 BSP threads.

Sten · 29th June 2007, 19:24

To be even more precise these connectors are now described in EN 144-2.

There are six connectors:

Male:
Fill Whip =<250 bar & 250-350 bar
First stage =<250 bar & 250-350 bar

Female:
Tank Valve =<250 bar & 250-350 bar

A proper =< 250 bar whip is supposed to fit into all tanks.
A proper 250-350 bar first stage is supposed to fit into all tanks.

A drawing of the similar but older swedish standard can be found at:
Åke Larssons site

The EN 144-3 nitrox thread works according to the same system, but with the G5/8 thread replaced by a M26x2 thread.

/Sten

Janos · 30th June 2007, 17:44

NigelH on these boards has written it all up beautifully here:

DIN Scuba Fittings

Janos

DanDunfee · 1st July 2007, 00:39

All: Thanks for helping with good and comprehensive info

Dan

27th June 2007, 21:54	#1 (permalink)
DanDunfee Custom Title Allowed! Current Rebreather/s: Other CCR Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Other SCR Home Build Join Date: Sep 2005 Location: Virginia, USA Posts: 204	Is G 5/8" threat fully interchangeable with Std SCUBA DIN thread ?? Can anyone please confirm, with certanty, whether the European G 5/8" thread is fully interchangeable with, what's generally known in the US as, a Std SCUBA DIN thread.?? If yes, is the G 5/8" thread a 200 Bar or 300 Bar thread ?? Thanks in advance for confirmation. Dan __________________ There are 'Bold' divers and old divers, but NO old, ' Bold ' divers
(Offline)

27th June 2007, 22:00	#2 (permalink)
Stephane Stéphane Acounis Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Nantes - France Posts: 788	Re: Is G 5/8" threat fully interchangeable with Std SCUBA DIN thread ?? Hello Dan, Scuba DIN thread is G5/8". Whether it's 200 or 300 bars, it's the length of the thread that differs. __________________ Stéphane
(Offline)

28th June 2007, 08:43	#3 (permalink)
Dinspiration Supporting Member Current Rebreather/s: Inspiration Classic Other CCR Other Rebreather/s: Not Bought Yet Other CCR Join Date: Dec 2005 Location: Switzerland Posts: 232	Re: Is G 5/8" threat fully interchangeable with Std SCUBA DIN thread ?? Hi, Important are the possible 200 and 300 bar G5/8 DIN combinations: First Stage Tank Valve Possible 200 bar 200 bar Yes 200 bar 300 bar No 300 bar 200 bar Yes 300 bar 300 bar Yes DINspiration
(Offline)

28th June 2007, 11:55	#4 (permalink)
Gibbon Southern Monkey Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Aug 2005 Location: East Devon Posts: 224	Re: Is G 5/8" threat fully interchangeable with Std SCUBA DIN thread ?? Quote: (Originally Posted by Dinspiration) Hi, Important are the possible 200 and 300 bar G5/8 DIN combinations: First Stage Tank Valve Possible 200 bar 200 bar Yes 200 bar 300 bar No 300 bar 200 bar Yes 300 bar 300 bar Yes DINspiration Not stictly true, AFAIK if there is a long nipple on a 300BAR reg or more commonly filling whip then it will bottom out in a 232BAR cylinder prior to a seal being made - the idea being that you cannot connect the 300BAR hose to a 232 BAR cylinder, but many 300BAR regs/whips will work fine in 232BAR DIN cylinders. 232BAR regs cannot get far enough into the valve to get a seal with the O-Ring. The difference between 300 and 232 BAR is the 7 or 5 threads respectively they are both parallel 5/8 BSP threads.
(Offline)

29th June 2007, 19:24	#5 (permalink)
Sten Beeing Visionary Current Rebreather/s: Inspiration Vision Other Rebreather/s: Inspiration Classic Join Date: Feb 2005 Location: Göteborg, Sweden Posts: 53	En 144-2 To be even more precise these connectors are now described in EN 144-2. There are six connectors: Male: Fill Whip =<250 bar & 250-350 bar First stage =<250 bar & 250-350 bar Female: Tank Valve =<250 bar & 250-350 bar A proper =< 250 bar whip is supposed to fit into all tanks. A proper 250-350 bar first stage is supposed to fit into all tanks. A drawing of the similar but older swedish standard can be found at: Åke Larssons site The EN 144-3 nitrox thread works according to the same system, but with the G5/8 thread replaced by a M26x2 thread. /Sten
(Offline)

30th June 2007, 17:44	#6 (permalink)
Janos "Two Sheds" Current Rebreather/s: Classic Kiss Other Rebreather/s: Classic Kiss Join Date: Feb 2005 Location: East Surrey Posts: 632	Re: Is G 5/8" threat fully interchangeable with Std SCUBA DIN thread ?? NigelH on these boards has written it all up beautifully here: DIN Scuba Fittings Janos __________________ You can lead a horse to water but you can't climb a ladder with a large bell in both hands - Vic Reeves www.hellfins.com/shed
(Offline)

1st July 2007, 00:39	#7 (permalink)
DanDunfee Custom Title Allowed! Current Rebreather/s: Other CCR Other SCR Home Build Other Rebreather/s: Not Bought Yet Other CCR Other SCR Home Build Join Date: Sep 2005 Location: Virginia, USA Posts: 204	Re: Is G 5/8" threat fully interchangeable with Std SCUBA DIN thread ?? All: Thanks for helping with good and comprehensive info Dan __________________ There are 'Bold' divers and old divers, but NO old, ' Bold ' divers
(Offline)

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