Regarding screw vacuum pumps
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It turns out that the company was using rotary vane vacuum pumps; it now plans to switch to screw + rotary vane vacuum pumps. The motor power will decrease as a result. I wonder if any of you in this community have experience with this.
Are there specific parameters, such as the medium, vacuum level, and pumping volume?
This depends on the gas being drawn. Consider various operating conditions.
In the polyurethane industry, acids react with alcohols to produce esters and water; vacuum is used to remove the water generated by this reaction. The vacuum level is around 25 Pa, with a gas flow rate of 300 l/s.
Considering your remarks on the 5th floor, the key question is what the actual pressure requirements are for your manufacturing process? Not the limit pressure value indicated on the vacuum unit’s label – the numbers you mentioned are those on the unit’s label, and they have no meaning!
Another point: the claim that the power drops when using a screw pump in combination with a Roots motor is nonsense, especially in process systems that involve substances capable of condensing