The total head is independent of the levels of liquid in the suctions tanks. Instead, they will report the totals head of the pump, the height between the level of liquid in the suctions tanks, & the height of a column of water that can be received by the pump. Pump manufacturers & suppliers often won’t tell you how much head a pump can produce because they can’t predict the height of the liquid in your suction tank. Increasing the level of liquid in the suction tank will lead to an enlarged head, and a decrease in the level will lead to a lower head. These numbers are known as the “total head” the pump can produce. So, in these cases, the same head generates different pressure.Īnother more useful measures of the head are the difference between the liquid level in the suction tanks & the head in the vertical discharge pipe. The force of a fixed heights liquid columns on a unitary sphere will change with different specific gravities. Instead, the pressure is dependent on the fluid and is affected by the fluid density. Ī given head is fluid independent, meaning that different fluids with different specific gravities are all raised to the same height. So what are the differences between pressure & head? As mentioned above, the head is the height given to the fluid by the pump and is measured in meters of the liquid column or simply indicated in meters. There is a strict relationship between them which is defined by the fluid specific gravity, so the relationship is fluid dependents. Sometimes the head can be confusing with pressures when choosing a pump. Also, note that the more liquid in the tank, the better the pump will be able to pump water into the vertical discharge pipe due to the suction head exerted by the liquid in the tank.Īlso, Read: What Is Power Transformer? | Power Transformer Theory | Power Transformer Working Principle | Types of Power Transformer Pressure Vs Head: The purest examples of this are if you have verticals pipes running straight up from the discharge outlet.Ī pump with a 5 m head will pump liquids 5 m above the pipe 5 m from the discharge outlet. Intuitively, if a pump can generate more pressure, it can pump more water & produce a higher head. Simply puts, the head of pumps is the maximum height that the pump can achieve pumping against gravity. This figure is measured in meters (or feet) and is calculated by placing a tube at the pump’s discharge and measuring the maximum height to which it can pump water. The larger the pump head, the more pressure the pump can generate. The pump head or discharge head of water pumps is measured by the power of a pump.
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