K valve to tank attachment

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Andy Backus - 16 Aug 2004 12:36 GMT

I just purchased a new s40 tank and k valve for my daughter, received
separately. Are there steps required prior to just screwing in the
valve to the tank?

Specifically:
1. does the o-ring require a coating of lubricate/protector?
2. how tight must the valve be screwed down?
3. any other steps that may be required

Any help would be appreciated. Thank you very much for your patience.
Andy

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bullshark - 16 Aug 2004 13:34 GMT

>3. any other steps that may be required

Yes. Take it to the dive shop that you expect will be filling it
and ask them to do a VIP.

Nobody is going to fill it for you until you have one.

When they're done, they'll assemble it for you.

safe diving,

bullshark

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Popeye NCAT3 - 16 Aug 2004 21:16 GMT

>From: andy.backus@comcast.net (Andy Backus)
>Date: 8/16/2004 7:36 AM Eastern Daylight Time
[quoted text clipped - 3 lines]
>separately. Are there steps required prior to just screwing in the
>valve to the tank?

I'd hope the tank and your daughter came seperately, for your wife's sake at
the least.

Popeye
"I didn't attend the funeral, but I sent a nice
letter saying I approved of it." - Mark Twain

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Rich Lockyer - 19 Aug 2004 04:31 GMT

>1. does the o-ring require a coating of lubricate/protector?

Just a touch of Krytox or Cristo-Lube on both the O-ring and the
bottom two or three threads of the valve.

>2. how tight must the valve be screwed down?

Just a tap beyond hand-tight. The O-ring seals it. You need it only
tight enough so that the valve won't accidentally spin off if you let
the tank get to "0". Do not wrench it on and smack it with a rubber
mallet. If you see someone at a dive shop begin to put a wrench on
your valve, politely ask them not to do it. The valve is soft brass.
The tank is soft aluminum. Gorillas will damage them.

>3. any other steps that may be required

Nope.

--- Rich
http://richlockyer.tripod.com/

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Wayne Cogdill - 19 Aug 2004 16:57 GMT

In my PSI class, they recommended 45-50 ft. lbs. to seat the valve.
Catalina also says 50 on their website. CGA says a max of 60 ft. lbs. for
aluminum tanks.

> >1. does the o-ring require a coating of lubricate/protector?
>
[quoted text clipped - 16 lines]
> --- Rich
> http://richlockyer.tripod.com/

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