Consultation on unit pressure drop

Hello, may I ask you some questions about the unit pressure drop?

a) The units like ```heat exchanger, storage tank, filter presser, conveyor``` can not achieve the pressure drop of the flow, if I want to achieve achieve the pressure drop of the flow, may I ask if you have any suggestions?

b) For the above units, if the pressure drop is achieved by unit ```pump```, it seems to consume power, besides, it seems unreasonable to achieve the pressure drop by pumping when transferring solids.

c) For case #96, could I trouble you spare some time to look at the issue published on December 5th? Since ```analytical specifications``` and ```numerical specifications``` are often used in the process, I wanted to make sure I was using them without problems.

Thank you very much for your help.