DIN Valve

DIN Valve

Post by Lase » Thu, 20 May 2004 11:17:59


Anyone know a good source for DIN valves ( single )  rated for the
3442 PST's ?
I looked at Diversdicount but it's a bit expensive.

Laser

 
 
 

DIN Valve

Post by Dillon Pyro » Fri, 21 May 2004 00:25:21



Quote:
>Anyone know a good source for DIN valves ( single )  rated for the
>3442 PST's ?
>I looked at Diversdicount but it's a bit expensive.

>Laser

I used to see DIN valves all the time.  Were they just a passing fad
(at least in the US)?  They obviously have some advantages (pressure)
but if the regulators themselves are still limited to 3000 psi, it's
not much of one.
--
dillon

When I was a kid, I thought the angel's name was Hark
and the horse's name was Bob.

 
 
 

DIN Valve

Post by Tony » Fri, 21 May 2004 01:08:48


Quote:


> >Anyone know a good source for DIN valves ( single )  rated for the
> >3442 PST's ?
> >I looked at Diversdicount but it's a bit expensive.

> >Laser

> I used to see DIN valves all the time.  Were they just a passing fad
> (at least in the US)?  They obviously have some advantages (pressure)
> but if the regulators themselves are still limited to 3000 psi, it's
> not much of one.
> --

You don't understand of the differences between A clamp & DIN.

In short:

1.  DIN is safer (far less likely for the O ring to blow or squeeze out, as
it's a trapped O ring).  Also, an A clamp is more prone to damage (and
dislodging) if there is an impact on the pillar valve, such as when
performing wreck or cave penetrations.  So it's far less likely to lose all
of your gas.

2.  DIN is more compact and therefore comfortable.  A clamps can dig in the
back of the neck when head is tilted up, such as when diving horizontally
and looking up).

3. DIN is more rugged, shown by the fact that the maximum pressure that ANY
A clamp is only limited to 200BAR (approx. 3000 PSI), whereas DIN (depending
upon length of thread) is either 232 BAR (3400PSI) or 300BAR (4400 PSI).

4. DIN is more compatible, as a DIN 1st stage can be used on an A clamp
cylinder with an A Clamp adapter, but not the other way around.

BTW, nearly all the latest regulators are available new in either DIN or A
clamp, mostly at no difference in  cost.   Nearly all of the DIN regulators
are factory set-up for 300BAR (4400PSI), and will obviously work with both
standard & high pressure cylinders (otherwise they would stop working when
the cylinder pressure fell during the dive).

Outside of holiday divers who rent all their gear, DIN is rapidly becoming
far MORE popular among the regular club divers throughout Britain, Europe
and all 'technical' divers worldwide due to these safety issues NOT the
pressure.

You don't need to be using high pressure cylinders to warrant using DIN 1st
stages, only some sense of self preservation.

TonyH.

Quote:
> dillon

> When I was a kid, I thought the angel's name was Hark
> and the horse's name was Bob.


 
 
 

DIN Valve

Post by Lee Bel » Fri, 21 May 2004 02:28:46

"TonyH" wrote

Quote:
> You don't understand of the differences between A clamp & DIN.
> In short:
> 1.  DIN is safer (far less likely for the O ring to blow or squeeze out,
as
> it's a trapped O ring).  Also, an A clamp is more prone to damage (and
> dislodging) if there is an impact on the pillar valve, such as when
> performing wreck or cave penetrations.  So it's far less likely to lose
all
> of your gas.

My A clamps are trapped also.  There's probably a slight difference, but not
much.  If you take care of your equipment, the difference is even smaller.
As for damaging from impact, neither is prone to damage and certainly not to
being dislodged.  In fact,  when disassembled, the DIN is more prone to
damage.  The A clamp's sealing surface is inside the loop of the A clamp.
With the DIN, the surface is fully exposed, as are the threads.  If either
is damaged, the connection does not work.

Quote:
> 2.  DIN is more compact and therefore comfortable.  A clamps can dig in
the
> back of the neck when head is tilted up, such as when diving horizontally
> and looking up).

Look again.  My Scuba Pro DIN sticks our further toward the back of my head
than my A clamp regulators.  The A clamp is on the other side.

Quote:
> 3. DIN is more rugged, shown by the fact that the maximum pressure that
ANY
> A clamp is only limited to 200BAR (approx. 3000 PSI), whereas DIN
(depending
> upon length of thread) is either 232 BAR (3400PSI) or 300BAR (4400 PSI).

A clamp is not limited to 200 BAR.  All of mine are rated to at least 3,300
psi and at least one person in this group has one rated considerably higher.

Quote:
> 4. DIN is more compatible, as a DIN 1st stage can be used on an A clamp
> cylinder with an A Clamp adapter, but not the other way around.

This is true.

Quote:
> BTW, nearly all the latest regulators are available new in either DIN or A
> clamp, mostly at no difference in  cost.   Nearly all of the DIN
regulators
> are factory set-up for 300BAR (4400PSI), and will obviously work with both
> standard & high pressure cylinders (otherwise they would stop working when
> the cylinder pressure fell during the dive).

This is also true.

Lee

 
 
 

DIN Valve

Post by mike gra » Fri, 21 May 2004 05:40:13

Quote:

>> 3. DIN is more rugged, shown by the fact that the maximum pressure that
> ANY
>> A clamp is only limited to 200BAR (approx. 3000 PSI), whereas DIN
> (depending
>> upon length of thread) is either 232 BAR (3400PSI) or 300BAR (4400 PSI).

All my tanks have din valves, and have had for about ten years now. I do
prefer them, but I wouldn't call them "rugged". The down side is (a) the
walls around the threads are thin, and are easily distorted if the valve
is whacked, and (b) the threads and seat soon lose their nickel/chrome
plating and thereafter have to be kept quite clean to prevent the first
stage from sticking and gas leakage around, and eventually through, the
O-ring.

As for the O-rings, a post valve will work fine with any O-ring you can
cram in the slot. A din MUST have the right O-ring (ending my days of
getting my spares off the deck).

 
 
 

DIN Valve

Post by Dillon Pyro » Fri, 21 May 2004 05:48:41

On Wed, 19 May 2004 16:08:48 +0000 (UTC), "TonyH"

Quote:





>> >Anyone know a good source for DIN valves ( single )  rated for the
>> >3442 PST's ?
>> >I looked at Diversdicount but it's a bit expensive.

>> >Laser

>> I used to see DIN valves all the time.  Were they just a passing fad
>> (at least in the US)?  They obviously have some advantages (pressure)
>> but if the regulators themselves are still limited to 3000 psi, it's
>> not much of one.
>> --

>You don't understand of the differences between A clamp & DIN.

Still, the question is, where are all the DIN valves in the US?  I
don't see a lot of them sold or in use.  I see very few fill stations
that can handle them.  And using an adapter just adds another point of
failure.

- Show quoted text -

Quote:

>In short:

>1.  DIN is safer (far less likely for the O ring to blow or squeeze out, as
>it's a trapped O ring).  Also, an A clamp is more prone to damage (and
>dislodging) if there is an impact on the pillar valve, such as when
>performing wreck or cave penetrations.  So it's far less likely to lose all
>of your gas.

>2.  DIN is more compact and therefore comfortable.  A clamps can dig in the
>back of the neck when head is tilted up, such as when diving horizontally
>and looking up).

>3. DIN is more rugged, shown by the fact that the maximum pressure that ANY
>A clamp is only limited to 200BAR (approx. 3000 PSI), whereas DIN (depending
>upon length of thread) is either 232 BAR (3400PSI) or 300BAR (4400 PSI).

>4. DIN is more compatible, as a DIN 1st stage can be used on an A clamp
>cylinder with an A Clamp adapter, but not the other way around.

>BTW, nearly all the latest regulators are available new in either DIN or A
>clamp, mostly at no difference in  cost.   Nearly all of the DIN regulators
>are factory set-up for 300BAR (4400PSI), and will obviously work with both
>standard & high pressure cylinders (otherwise they would stop working when
>the cylinder pressure fell during the dive).

>Outside of holiday divers who rent all their gear, DIN is rapidly becoming
>far MORE popular among the regular club divers throughout Britain, Europe
>and all 'technical' divers worldwide due to these safety issues NOT the
>pressure.

>You don't need to be using high pressure cylinders to warrant using DIN 1st
>stages, only some sense of self preservation.

>TonyH.

>> dillon

>> When I was a kid, I thought the angel's name was Hark
>> and the horse's name was Bob.

--
dillon

When I was a kid, I thought the angel's name was Hark
and the horse's name was Bob.

 
 
 

DIN Valve

Post by mike gra » Fri, 21 May 2004 07:34:26

Quote:

> Still, the question is, where are all the DIN valves in the US?  I
> don't see a lot of them sold or in use.  I see very few fill stations
> that can handle them.  And using an adapter just adds another point of
> failure.

My guess is that about half of the divers on the boats I dive use din.
 
 
 

DIN Valve

Post by Greg Mossma » Fri, 21 May 2004 07:54:43


Quote:
> Still, the question is, where are all the DIN valves in the US?  I
> don't see a lot of them sold or in use.  I see very few fill stations
> that can handle them.  And using an adapter just adds another point of
> failure.

I would guess they must all be in Southern California then, except that the
two separate sets of tanks that were procured for me last year in Florida
(thanks again to Dave and Curtis) had DIN valves so there's obviously at
least four such tanks in Florida too.  Maybe you don't get around very much.
Counting the DIN valves in Texas probably isn't a representative sample of
the U.S.  Who the heck dives in Texas?

As for failure point, you'd need a pretty big sledgehammer to make a DIN
adapter fail.  But it's nice when you can find DIN valves on the road since
the adapter does have a tendency to bang you in the back of the head.  Other
than Florida, I've only encountered DIN valves in a few shops in Cozumel and
on the Truk Odyssey.  Thankfully I don't dive much in Texas.

 
 
 

DIN Valve

Post by Brian Nadwidn » Fri, 21 May 2004 08:48:08

Quote:

> My A clamps are trapped also.  There's probably a slight difference, but not
> much.  If you take care of your equipment, the difference is even smaller.
> As for damaging from impact, neither is prone to damage and certainly not to
> being dislodged.  In fact,  when disassembled, the DIN is more prone to
> damage.  

I'll agree with that.

Quote:
> With the DIN, the surface is fully exposed, as are the threads.  If either
> is damaged, the connection does not work.

If the sealing surface on a DIN is damaged the fix is simple. Change the
o-ring, since that is the sealing surface.

Brian
Edmonton, Alberta

 
 
 

DIN Valve

Post by Tony » Fri, 21 May 2004 22:13:50

On the boat that I dive off of, 95% use din.
Quote:


>> Still, the question is, where are all the DIN valves in the US?  I
>> don't see a lot of them sold or in use.  I see very few fill stations
>> that can handle them.  And using an adapter just adds another point of
>> failure.

> My guess is that about half of the divers on the boats I dive use din.