Vacuum Chamber

Vacuum Chamber   (02/08/2016, 11:55 AM)

Converting a standard pressure canner to a vacuum chamber for impregnating wood blanks with stabilizer - evacuate air so fluid can fill voids. Need to determine max neg Hg Mercury I can pull and not get crushing pressure differential. Chamber is rated for safe operation at +15psi and the assumption would be that such a cylinder should withstand 15psi external pressure. Would like to be sure of reasoning BEFORE running an operational test behind sandbags. Max vacuum I can provide is -25"Hg. Can moderate with bleed valve. Will read with a standard vac gauge. I think it will be fine, but not an engineer. Thanks