Valve drill....?

[Twinsetmad]

Just a quicky....

I was watching Clare on youtube doing "the new Valve Drill"....

Then I looked at a couple of others... and they all are doing different things.

Clare shuts down her right post then swaps regs....
then shuts the centre isolator....
then opens right post....tests reg and swaps regs again....
then shuts left post and reopens manifold.....

do all different agencies teach a different order....of valve drill/ shutdown..?

just curious....thats all honest...

[Digger]

Different agencies do it differently, I presume you mean agencies as in TDI/IANTD/GUE?

I was taught on a TDI/PSA course to shut isolator first, then right off (main), swap to left (backup) then reopen right, swap to right, then left off, then reopen left, then open isolator.

The GUE method I don't know in detail but basically seems to go right middle left as opposed to middle right left or any variant of.

I also have successfully passed courses with IANTD closing the centre and right at the same time, effectively combining step one and two. But that was showing off a bit and trying to speed things up in bloody freezing water!

I think most agencies take a view if you can shut down and it works then you pass, with GUE you need to follow the GUE method I believe.

Digs.

[Mal Bridgeman]

Originally Posted by Twinsetmad

Just a quicky....

I was watching Clare on youtube doing "the new Valve Drill"....

Then I looked at a couple of others... and they all are doing different things.

Clare shuts down her right post then swaps regs....
then shuts the centre isolator....
then opens right post....tests reg and swaps regs again....
then shuts left post and reopens manifold.....

do all different agencies teach a different order....of valve drill/ shutdown..?

just curious....thats all honest...

Not sure what clip you are looking at but the *new* GUE drill is check back up, shut right, breathe down, swap, open right, check primary, swap, shut manifold, open manifold, shut left, purge backup, open left, check backup, flow check.

For drills, most technical agencies teach shut manifold first, GUE teaches shut the right post first.

HTH
Mal

[Scuttler]

I have tried the isolate, right then left. And the right, isolate, left methods. I think IANTD and TDI don't particularly prescribe to any order as long as you can shutdown, do it efficiently and stick to an order.

There was a recent test on gas loss during a shutdown and it was found that hitting the isolator first makes very little difference to the amount of gas lost.

I find that Right, Isolate, Left feels more natural to me.....perhaps that's why GUE teach that way?

[Mal Bridgeman]

Originally Posted by Scuttler

I find that Right, Isolate, Left feels more natural to me.....perhaps that's why GUE teach that way?

The reason it's done that way is that, bearing in mind it's the right post which is *most likely* to be faulty [1], your first action provides you with some info regarding the fault. If the bubbles stop, you know it was a right post failure, if the bubbles don't stop, you know it's not the right post.

There's more to it than that but that's the essence of it.

[1] Of course, if you know it's the left post then you shut that first.

Mal

[Twinsetmad]

its this one....



I suppose it does make sense to shut the main reg off first...then go for everything else...

[Twinsetmad]

another question....is the torch waving all part of it..? or is she just consentrating..

[Mal Bridgeman]

Originally Posted by Twinsetmad

its this one....

Phew ... she is doing it as I described

Originally Posted by Twinsetmad

another question....is the torch waving all part of it..? or is she just consentrating..

It's an essential part of the skill. It's saying "Oi! Team! Stop! I am having a problem so stand by to assist"
Mal

[Scuttler]

Originally Posted by Twinsetmad

another question....is the torch waving all part of it..? or is she just consentrating..

Signalling to buddy.

[ratcliffe]

I think the torch signal is to show the exact time that she is actually shutting down a post ?
The final torch signal is obviously an OK signal...