I have just received a recommendation to use a pump with a "Rated Flow" of 1cu.m/h and a "Rated Head" of 91m. I am realizing I am actually not familiar with these two terms (Rated Flow and Head).
My total dynamic head is a little more than the "Rated Head" (It's 110m), and I intend to pump at a flow rate a little less that the "Rated Flow" (I intend to pump at 0.5cu.m). Both these values--though not very efficient--fall well-within the constraints of the pumping curve. Should I be worried by the "Rated" labels? What exactly do they signify?