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Engr. Muhammad Abdul Mannan Miah Junior Instructor Mechanical Technology Presentation by

4th semester Mechanical Technology Today's Lesson

Definition, Types of Reciprocating pump, Discharge of a Reciprocating pump.

Reciprocating pump A reciprocating pump is also called a positive displacement pump, as it discharges a define quantity of liquid during the displacement of its piston or plunger.

Reciprocating pump diagram

Types of Reciprocating Pumps The reciprocating pumps may be classified as discussed bellow:- 1. According to Action of water (a) Single Acting Pump (b)Double Acting Pump

2. According to number of cylinders (a) Single cylinder Pump (b) Double cylinder Pump (c) Triple cylinder Pump 3. According to existence of air vessels (a) With air vessel (b) Without air vessel

Discharge of Reciprocating Pump Consider a single acting reciprocating pump ( i.e., a pump, in which the water is acting on one side of the piston only) Let L= Length of the stroke or piston, A= Cross-sectional area of the piston N= No. of revolutions, per minute of the crank

 Discharge of water in one stroke = LA  Discharge of the pump per second Q = If the pump is double acting reciprocating pump Q =

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