![]() The discharge static head is sum of the gas pressure at the surface of the liquid in the discharge vessel expressed as head rather than pressure and the difference in elevation between the outlet of the discharge pipe, and the centre line of the pump. The static head difference across the pump is the difference in head between the discharge static head and the suction static head. The first is the static head across the pump and the second is the frictional head loss through the suction and discharge piping systems. Essentially, the total differential head is made up of2 components. The total differential head a pump must generate is determined by the flow rate of liquid being pumped and the system through which the liquid flows. Another example is the flow rate of a cooling water pump circulating water through a heat exchanger is defined by the amount of heat transfer required. For instance the required flow rate of a pump feeding oil into a refinery distillation column will be determined by how much product the column is required to produce. This ultimately is defined by the mass and energy balance of the process. Usually, the flow rate of liquid a pump needs to deliver is determined by the process in which the pump is installed. Register now or log in to join your professional community.
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