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Posted : September 25, 2009
i have a 232 pony bottle and an oceanic cdx5 din, after removing the centre cap there are only 5 threads inside but 9 on the first stage forgive my ignorance but is this normal as it doesn't seem to go right in or am i missing something ?

Posted : September 29, 2009
Hi there,

Without seeing the DIN tricky to answer... other than to say
[1] DIN 232 BAR Cylinder VALVES generally only take five threads until the 'o' ring seats on the back wall - this is generally considered and has been proven to be the industry norm and is safe at these high pressures

[2] DIN 300 BAR Cylinder VALVES generally take nine threads until the 'o' ring seats on the back wall... to prevent 232 BAR regulators from sealing more threads are used which prevents the 'o' ring from sealing....

Now when a 1st stage regulator is sold it is sold as 232 BAR DIN or 300 BAR DIN or A CLAMP. You can buy conversion kits but as you can see the right one has to be fitted (i.e. 232 BAR DIN or 300 BAR DIN).

IT IS SAFE to insert a 300 BAR DIN fitting Regulator into either a 232 BAR Cylinder Valve or a 300 BAR Cylinder Valve so long as the 1st stage regulator is rated and manufactured/tested to work at 300 BAR.

hope this helps, Andrew
Answer provided by ADM Diving

Andrew Dawson-Maddocks
The views expressed by the author are their own and the publishers accept no liability for the advice and views expressed by the author, or other users, which are provided as a general service to divers. Users are warned that secondary posts are the views of other users and may not be technically correct.
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