First, by looking at the net positive suction head required (NPSHr) curve of the pump. This is a calculation of how much absolute pressure is needed at the inlet to keep the system from cavitating. Second, calculate the NPSH available (NPSHa). This value represents the absolute...
The vertical scale on the main curve is always differential head. Differential Head, often referred to as “Head” or “Total Dynamic Head”, is a universal method of quantifying the pressure the pump is capable of developing. Since pressure is relative to the process fluid density, virtually ...
Water creates pressure or resistance, at predictable rates, so we can calculate pump head as the differential pressure that a pump has to overcome in order to raise the water. Common units are feet of head and pounds per square inch. (A pump characteristic curve calculator might offer ...
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