| Imported post
gonna bring this one back to the front again (sorry Dave, keep doing this with your old posts!) Simply because it raises all kinds of issues.
The guy running iso shut...had he heard of thirds? if he needed to open the iso after a blow out to have enough gas to get out...surely he wasn't running them as independants as far as thirds goes? (third from one tank then swap over and so on) Otherwise he should be OK. seems like he was just increasing fail points in the top of the rig without the benefits. As for making the shut down work. Never done one in anger in two years, but I think the adrenalin will make me more not less flexible.
Time taken to shut down against gas lost in that time is interesting. Read an article about it in Diver a while ago comparing time needed to make it work depending on size of cylinders carried. Think it was about 6-8 months ago..will hunt it down.
Anyone got experiance of working like this?
JP
brief recommendations was that below 10 litre sets, run them independant or with ISO shut decanting periodically and reclosing the valve...again what's the point? may as well run thirds on independants.  |