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Old November 3rd, 2009, 21:27   #3
kullwarrior
 
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Join Date: Jan 2008
Location: Edmonton, AB, Canada
Found my answer for pressure:
Heres what I've got: (Trying to calculate whether its possible to use gbbs)


http://www.engineeringtoolbox.com/r2...ies-d_365.html
http://encyclopedia.airliquide.com

Use HFC134a guns will be considered as required 80psi to work, where as propane gun is 130psi. This brings the solution...
HFC134a: Use Propane around 0-5 degrees
Propane: USe Propylene approx 5-10 degrees...

Any daredevil want to try? (FYI Propylene is extremely volatile)
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