Seperating Doubles

[rox@ucf11]

Anyone ever hear of a manifold that will let you seperate the doubles w/o dumping the gas?

[ScaredSilly]

yes. it has four valves. it is a euro manifold not sure it has made it across the pond.

[navyhmc]

I have not worked with the newer doubles so this is a guess...

If you had a modern manifold

with an isolator and the vavles are on the tanks, you should be able to separate with out dumping the gas. If it's any of the older/vintage manifolds, you will have to dump gas to separate.

Note, this is from observation and looking at the newer manifolds, I haven't done this myself.

[CompuDude]

Originally Posted by navyhmc

I have not worked with the newer doubles so this is a guess...

If you had a modern manifold

with an isolator and the vavles are on the tanks, you should be able to separate with out dumping the gas. If it's any of the older/vintage manifolds, you will have to dump gas to separate.

Note, this is from observation and looking at the newer manifolds, I haven't done this myself.

Shutting the valve on a modern isolation manifold turns off the gas supply to the DIN outlet. The gas passage to the isolator and the other tank is still open. That's the power... you can kill the gas to one post in the event of a reg failure, but still access all of the gas in both tanks via the other post.

So in short, no, you can't turn off the knob on the left (for instance) and then remove the isolator, because all of the gas would then rush out of the open isolator path.

[navyhmc]

Works for me! Thanks. Guess that's what I get for thinking out loud.

[aggie99]

Originally Posted by CompuDude

Shutting the valve on a modern isolation manifold turns off the gas supply to the DIN outlet. The gas passage to the isolator and the other tank is still open. That's the power... you can kill the gas to one post in the event of a reg failure, but still access all of the gas in both tanks via the other post.

So in short, no, you can't turn off the knob on the left (for instance) and then remove the isolator, because all of the gas would then rush out of the open isolator path.

I guess you could close the isolator and bleed down and remove one tank without loosing the gas in the other...right? Not sure why you would want to go through the trouble but you could.

[WaterRat]

While technically you could do this, DON'T DO IT!!! To accomplish this with the Dive Rite style manifold you would have to spin the tank rather than turning the manifold to only seperate 1 tank from the crossbar. There is no way you can hold a 35#+ tank stable enoughto do this without damage. All you would end up doing is damanging the manifold.

Ron

[Gombessa]

Originally Posted by CompuDude

Shutting the valve on a modern isolation manifold turns off the gas supply to the DIN outlet. The gas passage to the isolator and the other tank is still open. That's the power... you can kill the gas to one post in the event of a reg failure, but still access all of the gas in both tanks via the other post.

So in short, no, you can't turn off the knob on the left (for instance) and then remove the isolator, because all of the gas would then rush out of the open isolator path.

Cool. Learn something new every day. So if one of the o-rings in the manifold blows, you're guaranteed to lose at least one tank worth of gas no matter what?

[cummings66]

That's one arguement against them. I think the chances of it are slim because modern designs use 2 o rings per side so you'd really have to be having a bad day to lose it. Some only have one O ring and those aren't preferred, big brand names too.