basic pump operating characteristics “head” is a term commonly used with pumps. head refers to the height of a vertical column of water. pressure and head are interchangeable concepts in irrigation because a column of water 2.31 feet high is equivalent to 1 pound per square inch (psi) of pressure.
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irrigation pumps are used to pump water from a lower to a higher level from which the water then flows through channels to the fields requiring irrigation (lift operation) or to raise it to the required pressure head so that it can be sprayed on the fields via piping systems (sprinkling). the heads involved range from approx. 1 m for normal lift operation to 40 m for sprinkling.
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