Pumping out of a vacuum chamber
Pumping out of a vacuum chamber
(OP)
I have a vacuum evaporator... the concentrated material falls into a sight glass/tube at the bottom, and we just have a hose barb connected to a peristaltic pump.
The evaporator is running at 20" Hg vacuum. the pump can't create enough suction to pull material out. (Without vacuum running, it can).
How do I go about pumping that material out? A diaphragm pump can create more suction... or should something like a rotary valve we used instead?
The evaporator is running at 20" Hg vacuum. the pump can't create enough suction to pull material out. (Without vacuum running, it can).
How do I go about pumping that material out? A diaphragm pump can create more suction... or should something like a rotary valve we used instead?





RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
So I think your idea of a rotary valve that maintains your evaporator pressure is the best solution, although I'm surprised the the peristaltic pump doesn't achieve the same objective. Maybe too much pressure drop in the hose barb, or some kind of surface tension effect of the concentrate in this area is preventing the pump from priming under gravity.
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
Also, we had been using the tubing in the pump head for a while.. so I replaced that.. wow it was flat!
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber
RE: Pumping out of a vacuum chamber