Quote:
| Originally Posted by Garf DIR gases are a piece of p1ss if you have access to high pressure EAN32
21/35 = 81bar He + top off with 32%
18/45 = 103bar He + top off with 32%
15/55 = 126bar He + top off with 32%
now isn't that nice. Almost like someone thought it all out  |
Not just DIR standard gases:
116 Bar => 16/50
139 Bar => 13/60 etc.
Quote:
| Originally Posted by Clare Gledhill Indeed Garf is right but rather than think of bar, think per centage.
So 21/35 is 35 per cent of final required fill pressure topped of with 32.
18/45 is 45 per cent, etc. etc. |
Which is all very nice, but how widely available is pre-blended 32% in the UK guys? Even my LDS (the best in the UK
) doesn't stock pre-mix.
access: If you PM me your email, I'll send you a small spreadsheet where you can enter any combination of Remaining Backgas; He; O2 and top-off mix. (Ideal Gas Laws only I'm afraid, but it's near enough at 230 Bar). It runs very nicely on a Windows PDA too.