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Daco Belt Driven Vacume Pump

Posted By: Ironman
Date: Sunday, 3 October 2010, at 6:08 p.m.


Does anyone Know what the drift rate should be on this pump?? I have an E.G.L. digital gauge: the pump will pull a work piece down to 01.42 (12mm tube),but when the main stopcock on the (Daco) manifold is closed,it will drift (or leak) back up to 19:00 within 2 mins.

Seems excessive OR there are leaks in the workpeice itself?? Thanks


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