[QUOTE=dkveuro;3608748]
Quote:
Originally Posted by funola
Would you know if I run two vacuum pumps in series, would I be able to achieve lower vacuum levels than a single pump? .......................................................[UNQUOTE]
I would say no. Both pumps do the same thing so very low vacuum of 1 torr or better would not be attained. Even lab' rated vac' pumps only pull down to 5 torr.
You need very specialized ( read : Expensive.) equipment to pull a near pure vacuum.
I would say that is is impossible to pull a pure vacuum.
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I can have access to a vacuum pump used in a lab, problem is getting permission to wheel my car in there. And then explaining of why I need that sort of vacuum in my car A/C
btw - funola
I have lived in third world countries where resources were scarce, I regularly saw A/C work being done by pressure testing with a junked refrigerator compressor pushing air in the system.
It was good enough - cant say about longevity, usually A/Cs were taxed to the max as summer meant 120F in the shade.