Technical Diving Skills – Valve Shutdown Drill Explained
This article, posted at Dive DIR, provides a very clear explanation of valve shutdown drills for isolated manifold doubles/twinset cylinders.
Great reading, if you are thinking about technical diving or just doing recreational scuba dives with doubles cylinders.
|Tuesday, 02 November 2010 17:39|
|This article outlines the process and reasoning behind the GUE approach to a valve drill.|
The basic valve drill involves closing and opening all three posts on a twin set starting with the right post, then the isolator, then the left post.
First of all, here’s what it is supposed to look like….
- Signal to your team you are going to perform a valve drill
- Wait until your team is in place and then continue
- Purge backup regulator
- Shut down the right hand post whilst simultaneously signalling you are manipulating a valve to your team
- When the post is shut down, breathe down the regulator until it “locks”.
- Remove the regulator and replace with your backup regulator
- Clip off your primary regulator on the right chest D ring
- Open the right post
- Unclip the primary regulator and purge it
- Remove the backup regulator from your mouth and replace with the primary regulator
- Shut down the isolator whilst simultaneously signalling you are manipulating a valve to your team
- When the valve is closed, re-open the isolator
- Move your torch to your right hand
- Shut down the left hand post whilst simultaneously signalling you are manipulating a valve to your team
- When the post is closed, purge the backup regulator until it “locks”
- Open the left post and purge to confirm it is working
- Move the torch to your left hand.
- Check the position of your right hand post
- Check the position of your isolator
- Move the torch to your right hand and check the position of your left post
- Signal that your drill is complete
Originally posted 2018-11-05 06:10:27.