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Tek-Talk: Discuss Relief valve lift bag in the Technical and Specialist Diving Forums forums: Hello All, I have just bought a 50lb, yellow lift bag. To be used as a back-up smb & '...

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Old 14-03-08, 12:33 PM
misterfrogfish misterfrogfish is offline
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Relief valve lift bag
Hello All,

I have just bought a 50lb, yellow lift bag. To be used as a back-up smb & 'help!'.
It is the self sealing type. The relief valve at the top faces inwards with the dump string inside the bag going down to the bottom.

The problem with the valve facing inwards is that it cannot work as an over pressure valve.
Should I change the valve so it faces outwards, but exposes the long dump string?

Do self sealing smbs/lift bags allow air to pass without the valve?

MFF

Originally posted in 'other dive equipment'.
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Old 14-03-08, 10:15 PM
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G man G man is offline
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Surely if the string protrudes from the bottom of the bag then that would stop a gas tight seal so there is no need for a over inflation valve as the gas will just come out of the bottom of the inflated bag.

The reason for the inward facing valve is that the air pressue inside the bag seals the valve tighter so the valve should not fail and the bag sink once you have raised a nice helm or bell or the likes.

G.
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Old 14-03-08, 10:18 PM
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Charley Charley is offline
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Quote:
Originally Posted by G man
The reason for the inward facing valve is that the air pressue inside the bag seals the valve tighter so the valve should not fail and the bag sink once you have raised a nice helm or bell or the likes.

G.
Like you would know!
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Old 14-03-08, 10:32 PM
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G man G man is offline
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Just remember mate you have to leave the shot line to find anything unless your really lucky!

Gxx.
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Old 14-03-08, 10:34 PM
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deepestandy deepestandy is offline
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sounds like its inside-out
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Old 15-03-08, 10:14 AM
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does sound suspiciously like it is inside out
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Old 15-03-08, 06:33 PM
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Charley Charley is offline
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Quote:
Originally Posted by G man
Just remember mate you have to leave the shot line to find anything unless your really lucky!

Gxx.
i do leave the shot, if i get in the water and remember my suit
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Old 15-03-08, 06:34 PM
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Quote:
Originally Posted by Charley
if i remember my suit
you must be a mate of Ash and Dave
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Old 16-03-08, 07:57 PM
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I concur
Quote:
Originally Posted by Charley
Like you would know!
I concur,

Ignore liftbag advice from G Man.
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Old 17-03-08, 09:39 AM
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Wink
I double concur,
The only time G man has even seen a lifting bag was when Muckmuppet was repacking his after it's inaurgral sucessfull outing !
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