This document summarizes key aspects of centrifugal pumps, including: 1. Centrifugal pumps use rotational kinetic energy to transport fluids by converting it to hydrodynamic energy. 2. Centrifugal pumps are classified based on casing type, working head, liquid handled, number of impellers/shafts, and impeller flow direction. 3. The impeller is the rotating part that consists of backward curved vanes mounted on a shaft connected to a motor. Impellers can be closed, semi-open, or open.

1. Presented By:- Guided by:-
B. Rajeshwari
Chetan lal thakur
Chitrangad sahu
Damini sahu
Daneshwar singh thakur
Mr. Gajendra Dewangan

2. •Centrifugal pump
•Classifications of centrifugal pumps
•Types of Impellers
•Casings
•Stages
•Couplings

3.  CENTRIFUGAL PUMP
 Centrifugal pumps are used to transport fluids by the
conversion of rotational kinetic energy to the
hydrodynamic energy of the fluid flow

4. Classifications of centrifugal pumps
On the basis of characteristics features, the centrifugal pumps are
classified as follows:
1.Types of casing;
i)Volute pumps ii)Turbine pump or diffusion pump
2.Working head;
i) Low lift ( to build upto 15m head)
ii) Medium lift (to build as high as 40m head)
iii) High lift (to build above 40m head)
3.Liquid handled;
i)Closed impeller pumps
ii)Semi-open impeller pump
iii)Open impeller pump

5. 4.Number of impellers per shaft;
i)Single stage ii) multi- stage
5.Number of entrances to the impeller;
i) Single entry or single suction pump
ii) Double entry or double suction pump
6.Relative direction of flow through impeller;
i)Radial flow pump ii)Axial flow pump
iii)Mixed flow pump
Classifications of centrifugal pumps

6. Impeller
 The rotating part of a centrifugal pump is called
‘impeller’.
 It consists of a series of backward curved vanes.
 The impeller is mounted on a shaft which is connected
to the shaft of an electric motor.
Types of Impellers
i)Closed impeller
ii)Semi-open impeller
iii)Open impeller

7. Casing
 It is an air tight passage surrounding the impeller.
 It is designed in such a way that the kinetic energy of
the water discharged at the outlet of the impeller is
converted into pressure energy before the water leaves
the casing
Types of casing;
i) Volute casing
ii) Vortex casing
iii)Casing with guide
blades

8. Stages
Types of stages in centrifugal pumps
Multi stageSingle stage
Consisting one impeller Consisting two or more impellers
Connected in series Connected in parallel
Used to develop high
head
Used for discharging
large quantity of liquid
Most widely used in
production operation
Fig.(A) Fig.(B)

9. Fig.(A)
Fig.(B)
Impellers Connected in series
Impellers Connected in parallel

10. Coupling
 A coupling is a device used to connect two shafts
together at their ends for the purpose of transmitting
power.
Shaft coupling
Misalignment type

11. Coupling type
Double-cardanic coupling for
compensating shaft offset

12. Curved-tooth gear coupling
Spacer –type coupling

13. Uses of Couplings

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