International Journal of Advance Agricultural Research
ISSN: 2053-1265
Vol. 6(1), pp. 1-17, February 2018

Experimental study on performance characteristics of a small centrifugal pump

Muhammad Rashed Al Mamun1*, Washik Ibna Mahfuz2 and Khan M. Hassanuzzaman2

1Department of Farm Power and Machinery, Sylhet Agricultural University, Sylhet-3100, Bangladesh.
2Department of Irrigation and Water Management, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

*To whom correspondence should be addressed. E-mail:

Received 23 October, 2015; Received in revised form 24 January, 2018; Accepted 01 February, 2018.


Centrifugal pump, Manometer, Hydraulic energy, Delivery lift.

A study on performance characteristics of a centrifugal pump was carried out in the hydraulic laboratory. A half horse power (hp) motor driven centrifugal pump was used. The performance characteristics of the centrifugal pump was tested under varying proportions of suction and delivery lifts for a wide range of total lifts. The pump was operated for a total lifts of 2.00, 4.00, 5.50 and 7.40 m. The results obtained reveal that for a given total lift, the efficiencies of the pump varied with the different ratios between suction and delivery lifts. For the total lift of 2.00 m, both the efficiency and discharge decreased with the increase of suction lift. For the total lifts of 4.00, 5.50 and 7.40 m, the maximum pump efficiency was obtained when the suction lift was at or around 2.00 m. This suggests that the pump operates more efficiently when the suction lift was at about 2.00 m, irrespective of delivery lift. The study results also showed that, the efficiency increased and discharge decreased, in general, with the increase of total lift. The variations of discharge due to variable ratios of delivery to suction lifts were more prominent for a low lift than the higher lifts. The performance characteristics of the centrifugal pump, used in this study, were similar to those reported earlier on some points, while it differed on some others.

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