I've had a few years experience degassing medium viscosity silicone rubber mixes for mould making, and my initial reaction to the figures you've been quoting are that they seem a bit extreme.
I started with a lab water-powered venturi and that did a reasonable job with a rubber that was thicker than "runny honey" but thinner than peanut butter.
I've no idea on measurements in stokes or poise or whatever, but if you took a pint glass half full and tipped it up, it would take about 10 seconds to reach the edge(20 secs on a cold day )
When you start to reduce the pressure above a fluid mix containing bubbles, there is a steady air loss that accelerates as the pressure goes down, until some critical pressure is reached. At this point, the fluid erupts to about 3 times its original volume, so you need a vessel 3.5 times the volume of the mix if you don't want it to go into the pump.
Once that point is reached, you can allow the air back in, as virtually all the removable air has just come off.
If you can reduce the pressure still further you might reach the vapor pressure of the fluid at room temperature, when it will start boiling.
This is why even the best water powered vacuum system cant get below about 15 torr, the vapor pressure of water at 15 degrees C.
I've also used an old two stage fridge pump from a butcher's cold store, by re-jigging the piping.
Then went on to an Edwards high vac pump which I found in an auction, but I only found the convenience of not needing to get to the kitchen sink better, not the degassing.
In all cases the container I used was a 12" length of 6" diameter plastic soil pipe, with an epoxied on plywood base, and a removable top of 1/2" perspex(Plexiglas).
Just my bit of experience if it helps
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