Pro/Forums - View Single Post

punish3r · 11-30-2002, 08:40 PM

The only pumps that I know of that'll do -40 C without problems are R-134a vapor transfer pumps. And they're designed to go a bit colder than that. And usually start at $500 US. I'm sure that you could build a small, sealed chamber with a sealed thrust bearing and a small rotary vane impeller connected through the bearing to an external drive motor. But hey, that's only if you have access to the tools to build the neccessary parts.

11-30-2002, 08:40 PM	#3
punish3r Cooling Neophyte Join Date: Nov 2002 Location: Colorado Posts: 34	The only pumps that I know of that'll do -40 C without problems are R-134a vapor transfer pumps. And they're designed to go a bit colder than that. And usually start at $500 US. I'm sure that you could build a small, sealed chamber with a sealed thrust bearing and a small rotary vane impeller connected through the bearing to an external drive motor. But hey, that's only if you have access to the tools to build the neccessary parts. __________________ Fix reason firmly in her seat, and call on her tribunal for every fact, every opinion. Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason than that of blindfolded fear. -Thomas Jefferson