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Re: Creating vacuum

Posted By: Dennis McInerney
Date: Saturday, 28 July 2007, at 3:27 p.m.

In Response To: Creating vacuum (Jan)


> Will adding a foreline trap (molecular
> sieve) to a refrigeration service vacuum
> pump (rated at 25 mikron) drop the pressure
> enough for neon service?

> Jan
Hey Jan, My primary occupation is in HVAC. I was curious about this myself and tried it with a New pump. The best vacuum I could get was 4 microns measured with an electronic gauge. That was with a new broken-in JB 10cfm pump with fresh oil and warmed-up. The tube would light, was off-color and ran very warm. I do not think these pumps are Tight enough to acheive the kind of vacuum that is needed, but that is just my opinion

Dennis


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