Agriculture Reference
In-Depth Information
A booster pump, on the other hand, is used to increase the water pressure of water
that is already on its way somewhere.
12.2.3 Principles in Water Pumping
Basically there are four principles involved in pumping water:
(1) Atmospheric pressure
(2) Centrifugal force
(3) Positive displacement
(4) Movement of column of fluid caused by difference in specific gravity.
Pumps are usually classified on the basis of operation, which may employ one or
more of the above principles.
12.2.4 Classification of Pumps
Whether you are selecting an irrigation pump to a new-install system or replace the
one in your existing system, you will first need to understand the different types
available. There are pumps designed to fit each system.
The pumps can be classified based on different perspectives, such as
(a) mode of intake of fluid to pumps
(b) position of motor or prime mover
(c) the type of use (field of use)
(d) the principle by which energy is added to the fluid
(e) specific geometries commonly used
(f) design of the pump
12.2.4.1 Classification Based on Mode of Intake of Fluid to Pumps
According to the mode of intake of fluid to pumps, pumps can be classified into two
groups:
(i) Suction mode pump
(ii) Force mode pump
Suction mode pumps are the pumps which draw water into the pump casing by
applying suction force. The pump is located above the water level (at the soil surface
or at specified location of the surface). The theoretical limit of lifting water from the
soil surface is equal to the atmospheric pressure of the location concerned. The
reciprocating pump falls into this category.
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