Let’s consider a machine that uses two hydraulic circuits to perform its function. One circuit is open circuit and another one is closed circuit. If we consider using a common reservoir, what will be the most important points that we should consider?
thanks

What points do you consider when using the circuits you mention with separate tanks?

It would seem whatever that is would be satisfactory for a system using both type circuits on the same rerervoir.

You can see my take on Reservoirs in Chapter 6 of "Industrial Fluid Power Basics" at the "Ebook" Link on the home page of this Forum.