Butane Temps Under Vacuum

[EArts]

Does anyone have a chart for butane temperature under vacuum? I’m curious as to the temperatures it’s reaching during one extraction method I use but can’t find a chart anywhere. The temperature gun reads below -40c, but I’m curious as to exact temps.

 

[EArts]

These are temps without dry ice. Nothing but butane at vacuum creating huge ice sheets over closed loop columns.

 

[aSilvrHaze]

I don't know if this is what you're looking for, but these are the only charts I have regarding butane, temps, and pressure...

 

[AnselAdams]

Does anyone have a chart for butane temperature under vacuum? I’m curious as to the temperatures it’s reaching during one extraction method I use but can’t find a chart anywhere. The temperature gun reads below -40c, but I’m curious as to exact temps.

I found this chart which seems to indicate that as you approach zero atmospheres the min. temp of butane drops until you get to zero atmospheres and -50f. It also seems that once you drop below zero atmospheres, the temp stops dropping. Just as it appears that after you cross +100f the max pressure for butane is 60psi or 4 atmospheres.

It will be nice if we could get professional opinion from a community member.