2. Hydraulic machine which convert mechanical energyHydraulic machine which convert mechanical energy
into hydraulic energy.into hydraulic energy.
CLASSIFICATION OF PUMPS:CLASSIFICATION OF PUMPS:
Dynamic pumps:Dynamic pumps:
Energy is continuously added to increase the fluidEnergy is continuously added to increase the fluid
velocity.velocity.
Displacement Pumps:Displacement Pumps:
Energy is periodically added by applying forceEnergy is periodically added by applying force
directly to the fluid.directly to the fluid.
PUMPPUMP
3. Dynamic Pumps
Centrifugal Special EffectSingle
Stage
Axial Flow
Multi -
Stage
Mixed Flow
Peripheral
Closed Impeller Open Impeller
Fixed
Pitch
Variable
PitchSelf
Priming
Single
Suction
Double
Suction
Non
Priming
Single Stage
Multi StageSingle
Stage
Double
Stage
Self Priming
Non Priming
Jet
Gas Lift
Hydraulic ram
Electro magnetic
5. Single Acting Pump:
A single acting pump is one the takes the suction, filling the pump cylinder on the
Stroke in only one direction called the Suction stroke & then forces the liquid out
of the cylinder on the return stroke called Discharge stroke.
6. Double Acting Pump:
A Double acting pump is one that, as it fills one end of the liquid cylinder, is
discharging liquid from the other end of the cylinder. On the return Stroke ,
the end of the Cylinder just emptied is filled and the end just filled is emptied.
10. AL Type C Type
H Type
CouplingsCouplings
RSS Type
11. TERMINOLOGY IN PUMPSTERMINOLOGY IN PUMPS
SUCTION & DISCHARGE HEADSUCTION & DISCHARGE HEAD
DELIVERYDELIVERY
PRIMINGPRIMING
CAVITATIONCAVITATION
NPSHNPSH
12. PRIMINGPRIMING
PRIMING OF PUMP:PRIMING OF PUMP:
Filling of pumps suction pipe, casing up to delivery valveFilling of pumps suction pipe, casing up to delivery valve
with liquid .i.e liquid to be pumped by means of externalwith liquid .i.e liquid to be pumped by means of external
source.source.
WHY PRIMINGWHY PRIMING ??
When the pump is running without liquid that means it isWhen the pump is running without liquid that means it is
running in air, thus the head generated by the pump is inrunning in air, thus the head generated by the pump is in
term of air column.term of air column.
The generated head of air is very less when compared toThe generated head of air is very less when compared to
water head. Hence the liquid may not be sucked by pump.water head. Hence the liquid may not be sucked by pump.
13. CAVITATIONCAVITATION
Forming of vapour bubbles and subsequent collapse ofForming of vapour bubbles and subsequent collapse of
the vapour bubbles form high pressure.the vapour bubbles form high pressure.
Cavitation is an abnormal condition that can result inCavitation is an abnormal condition that can result in
loss of production, equipment damage, and worst of allloss of production, equipment damage, and worst of all
personal injurypersonal injury
15. EFFECT OF CAVITATION:EFFECT OF CAVITATION:
Noise and vibrations.Noise and vibrations.
Pitting of metal surfaces.Pitting of metal surfaces.
Efficiency decreases.Efficiency decreases.
16. GENERAL CHECKLISTGENERAL CHECKLIST
NPSH. (Net Positive Suction Head):NPSH. (Net Positive Suction Head):
Minimum head required to over come cavitation.Minimum head required to over come cavitation.
HOW TO SPECIFY A PUMPHOW TO SPECIFY A PUMP::
Discharge Pressure in MLC.Discharge Pressure in MLC.
Discharge in M3/Hr.Discharge in M3/Hr.
17. Pump Selection ParametersPump Selection Parameters
Capacity :Capacity :
Capacity of pump depends upon the total quantity of fluid required for the
circulating fluid system and the number of pumps to be provided for the system
It comprises of static head and frictional losses.
Total Head:Total Head:
