No problem, the 300 DIN will fit. However the reverse will not work, a 200 bar DIN into a 300 bar valve. DINs are primary made as 300 bar, Posiedon did make a 200 DIN regulators in the 1970's which some divers still use.
Hello. I have an old scuba tank with 300bars pressured air and 7/8" DIN valve and I'm looking for a fill station for my HPA tank at the airgun. Can I use the 7/8DIN to yoke adapter you showed to fill my smaller hpa tank if I don't go over 232 bars? Could it still handle 300bars momentarily when filling if I were to fill it to the 300 bars? My smaller bottle and bottle regulator are also rated to 300bar but I think the yoke connection of the adapter I plan to use is the weakest part here. Other question is, what is the function of the small brass part at the end of the DIN male connector? Does it seal the connection somehow because I have seen regulators sold where there are no brass plate at the end. Some of them also have the o-ring sealing at the stem of the threads and I guess this can only be used with straight to the scuba tank connections where the tank has a groove for the sealing ring on itself and can't be used when there's this old 7/8"DIN valve between them, right?
Yes you can use the 7/8 fill adapter it can handle 300 bars no problem. However it's not ntended to dive only for filling. The small brass part is a stem which fits inside a recess in the 7/8 valve. This brass fill adapter was designed only for the 7/8 valve, you can find differnent fill adapters without this which also work fine. I hope this helps, thanks for the question.
@@scubatechkeylargo Thanks. One more thing, I'm trying to find a proper DIN-yoke adapter now from around the net but I only come across with adapters that are 5/8". If I don't find a suitable adapter for the yoke connection and the fill station I have, could I simply use one of those fill stations that has 7/8" thread but there are no rubber o-ring at the end of the male connector on these, but one at the stem of the thread as in those regulators we use at our HPA tanks in our guns. So, can the thread be sealed properly if there's no o-ring at the end of the male thread like you'd normally had in DIN male?
@@scubatechkeylargo Hmmm. Now I'm confused. In this video you show the difference between 200 and 300 bar valves and their bottleneck thread seems to be different size... Also, my friend measured my tank's valve thread and it is 7/8" where the fill station(or 1st stage) should be attached. This 90's tank setup is actually two tanks in parallel, connected with a connection that has a thin tube between the tanks inside the composite plastic carry handle. Could this be CGA347 because these are old firefighter bottles?
the HP steel in my video is a 3500 psi which is the 7/8 tank threads and 300 bar DIN the 3442 HP steel can use 200 bar DIN and conventional valve threads, same as in alum 80 Firefighters use SCBA bottles which are carbon fiber wrap and CGA 347 valves
You can install a 300 bar DIN onto your regulator to fit the tank valve. The tank valve on a 3500 psi smaller neck cylinder can only be 300 bar. A 200 bar valve is not made for this tank. Thanks for the question...
