Vacuum pump power requirements (Watts)
 

I want to know how many Watts are necessary to maintain airflow in my solution.
The end result: To find a pump that will provide adequate vacuum and airflow, without being over-sized.

And your question is ....?

Ok, here it is in question format.
Given that my input pressure is 100 kPa and my output pressure is 30 kPa. What CEL formula would I use to solve for power required at the outlet to maintain this pressure differential?

Power = Volume Flow rate times pressure difference.