Mailing List Archive

Mailing List: techdiver

Message Display

Chris,

I have been doing fills for nitrox and tri-mix for quite some time as you
know. Here are a few points (developed over many years and many fills) that
may help you with your project.

#1  The problem with maintaining gas temperature during fills is not a
problem. To expedite fills and maintain a constant gas temperature I heat the
O2 bottles before filling. I have a bunson burner under each of my O2 K
bottles, and I monitor the flame to make sure that it is always "blue". I
keep the O2 bottles at a constant 250 degrees.

#2  The Helium is kept under ice, at a constant 10 degrees. 

#3  When filling, I always fill with the Helium first, very slowly, to ensure
that the helium does not get to warm when filling. The colder the helium, the
better.

#4  Next I add O2, as quickly as possible, and turn the bunsons up to full
bore. Now your'e really cooking. 

#5  I skip adding air, and use with whatever I wind up with.

#6  To ensure even blending I tie a rope to the valve of the tank and tow the
tank behind my truck. The bumpier the road the better the mix.

#7  For maintaining temperature while diving, I use an atpak. Instead of
filling the back pak with lead, I use dry ice-this has proven to work well
over the years, and when you jump in the water the "smoke" that forms is
pretty cool. Divers just love it.

Any questions don't hesitate to ask.

Safe diving,
Raimo.

Navigate by Author: [Previous] [Next] [Author Search Index]
Navigate by Subject: [Previous] [Next] [Subject Search Index]

[Send Reply] [Send Message with New Topic]

[Search Selection] [Mailing List Home] [Home]