You are correct that the water will cool due to evaporative cooling, and can reduce the temperature down to the freezing point. As the water temperature drops, so does the vapor pressure, so the depth of vacuum you need to achieve to continue drying also drops.
To handle this application it is...
ICMS,
Trying to centralize your vacuum pumps on batch vessels (batch reactors) can be difficult if you need to maintain vacuum on all the other vessels if you are bringing even just one on line. If you are trying to maintain vacuum on the 8 vessels at, say 25"HgV, but need to bring a large...