(1) Flow Q flow is the amount (volume or mass) transported by the subordinate pump within the unit time.

     The volume flow is represented by Q, the international unit is: M3/S, and the commonly used in the project is M3/H, L/S, etc.

     Quality flow is represented by QM, international units: KG/S, and commonly used in engineering are L/H.

     The relationship between quality flow and volume flow is

     Qm = ρq (7-1)

The density of the liquid in the formula (kg / m3);

     Q — Volume flow (m3 / h) o

     (2) Raising Hoholi refers to the energy obtained by the unit weight liquid pumped from the lower pump of the liquid liquid to the lower pump of the liquid liquid.

     The concept of an increase in energy increment is the energy incrementation obtained by the unit liquid from the inferior pump in the lower liquid pump to the export flange (under the pump outlet of the liquid pump).