It takes a very long time to remove the water with a vacuum pump, it's "sticky" and has a fairly low vapor pressure. If you purge with dry gas first you only have to get the stuff that stays a gas a room temp out.
The difficulty is that there is no mass movement of molecules in moderate to high vacuum, everything moves by diffusion. That's not very fast for things that want to stick to the pipes and hoses. Permanent neutral gasses diffuse through the pipes and hoses to the pump fairly quickly. _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
