Vacuum pumps used for refregriation are certified intrinsically safe. So long as the vacuum pump is certified as such you would be good. Uncertified you would just be waiting for the event to happen!

__________________
92 e300d2.5t
01 e320
05 cdi
85 chev c10

I think there at least two things wrong with that statement...
First.... that pump is safe when used in a CLOSED SYSTEM.... not tested or certified pulling potentially explosive gases into it...
Second.... a refrigerator pump is in the same category as an R4 with regards to Lubrication... it is lubed by the mix of oil in the refrigerant... which keeps going around the closed system.... so it will not last long if used without a relube designed into it....

__________________
1980 240d ,

chain elongation, cam marks reference:
http://www.peachparts.com/shopforum/showthread.php?threadid=10414

http://www.peachparts.com/shopforum/diesel-discussion/305365-9-degrees-chain-stretch.html

evap fin cleaning:

http://www.peachparts.com/shopforum/showthread.php?t=156207&highlight=evaporator

A/C thread

http://www.peachparts.com/shopforum/diesel-discussion/297462-c-recommendations-mb-vehicles.html

But in this application it is an open system when the tank is creating the initial vacuum. Just throwing any electrical vacuum pump in creates a hazard unless the pump is certified for the vapours.

__________________
92 e300d2.5t
01 e320
05 cdi
85 chev c10