FlowerPower88
Well-Known Member
I would like to get a better quality vacuum pump, right now I am using a robinair vacumaster model 15500, rated for 5 cfm. I run that with no cold trap and I frequently change the oil. My problem is that I don’t want to spend good $ on a nice pump to run it like that with purged solvent through it. I live in a very small town, there is no dry ice, the closest dry ice sucks and it is 1.5 hours away, the closest pelletized dry ice or good hard block is 2.5 hours away. I can get dry ice delivered for a $25 delivery fee once every 3 weeks, which works perfect for inline dewaxing, but makes it hard to maintain a cold trap for 3-4 day low temp purge. What would you recommend? Is liquid nitrogen so what easily attainable, and will that last longer?