On Tuesday, October 29, 2019 at 11:18:06 PM UTC-4, Leighton1210 wrote:
I need a way to vacuum hot oil without collapsing a vessel. We have been
using 55 gallon drums for oil that has cooled down, but, they will collapse
when enough hot oil is vacuumed into them. My thought was to use a 20 gallon,
200 psi, 650 degree F rated air tank. This would not be a true vacuum. There
will be constant air flow. The hot oil that we need to vacuum is only about 1
to 1 1/2 inches deep, so, a standard hot oil pump will not work.

-- For more than 10 years we sucked used coolant into 55 gallon drums with a vacuum motor bolted to the lift off lid no problems with collapsing at all, but we used 2inch ID hose. As others have said only 15psi max with a hivac pump not a vacuum cleaner type setup. You should be able to empty in less than a minute.
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