Mataria Faculty of EngineeringMechanical Power Department

PUMPSPUMPSSelection & Operation

By

Prof. Dr. Eng. Ahmed Abohbsa

Chapter IChapter I

Classification of PumpsClassification of Pumps

PumpsPumps

Displacement DynamicDisplacement Dynamic

1- Classification of Dynamic 1 Classification of Dynamic Pumps

1.1 Classification according to Impeller ShapeShape

1.2 Classification according to Casing DesignDesign

1.3 Classification according to Mechanical DesignMechanical Design

Classification according 1.1 Classification according to Impeller shapeto Impeller shape

Single Suction

Radial Flowg

Mixed FlowShrouded

Double Suction

Axial Flow

RegenerativeOpen ImpellerStar

Regenerative

Propellerperipheral

Impeller Shape Number ΩS (Specific Speed NS)

Qω QN( ) 4/3gH

QS

ω=Ω

4/3HQN

NS =Q [m/s]H [m]ω [1/s]

Q [GPM]H [ft]N [rpm]( )gH H

Dimensionless

Ω =0 20 70 Ω =0 60 2 0 Ω =1 80 4 0 Ω =3 5 10ΩS=0.20-.70 ΩS=0.60-2.0 ΩS=1.80-4.0 ΩS=3.5-10

NS=2733 x ΩS

Classification according 1.2 Classification according to Casing Designto Casing Design

Volute Casing Diffuser Casing (T bi t )Volute Casing (Turbine type )

Single Volute

Double Volute

Deep Well Turbine Pump

Classification according 1.3 Classification according to mechanical Designto mechanical Design

C t if l l l d l l dCentrifugal (Radial, Mixed & Axial)

Close Coupled Separately Coupled

End suction In Line

RegenerativeEnd suction In Line

Overhung Impeller Impeller Between bearings

Special Effectg p bearings

Single stage Multistage

Vertical TypeHorizontal

Volute Turbine

Dry Pit Wet Pit

Overhung Impeller, Close Coupled, Single Stage, End Suction

Overhung Impeller Close Coupled Overhung Impeller Close Coupled Overhung Impeller, Close Coupled, Single Stage, Submersible

Overhung Impeller, Close Coupled, Single Stage, Inline

Overhung Impeller, Separately Coupled, Single g p , p y p , gStage, Frame Mounted

Overhung Impeller, Separately Coupled, Single Stage, Wet Pit Volute

Overhung Impeller, Separately Coupled, Single Stage, Inline, Flexible Coupling

Impeller Between Bearings, Separately Coupled, Impeller Between Bearings, Separately Coupled, Single Stage, Axial (Horizontal) Split Case

Axial (Horizontal) Split Case Pump

Impeller Between Bearings, Separately Coupled, Multi-stage, Radial (Vertical) Split Case

SubmersibleEnclosed Line Shaft

Open Line Shaft

Turbine Type, Vertical, Multi-stage, Deep Well

Line ShaftShaft

Mixed Flow Vertical

Vertical, Axial Flow, Impeller (Propeller) Type(Propeller) Type

Regenerative Turbine, Impeller Overhung Single StageOverhung, Single Stage

Regenerative Turbine, Impeller Between Bearings, Two Stage

Recommended Names of Centrifugal Pump Parts

2- Classification of 2 Classification of Displacement Pumps

2.1 Rotary pumps

2.2 Reciprocating pumps

Displacement Pumps

Rotary Pumps Reciprocating Pumps

Pi t Power

Vane

Piston

Flexible Member

Power

LobeControlled Volume

Gear

Steam

Screw

Steam

Rotary PumpsRotary Pumpsy py p

VaneVane

Sliding Vane Pump External Vane Pump

PistonPiston

Axial Piston Pump

Flexible Flexible Member

Flexible Vane

Fl ibl LiFlexible Tube

Flexible Liner

LobeLobe

Three-lobe PumpSingle Lobe Pump

GearGear

Internal Gear Pump (With Crescent)(With Crescent)

External Gear PumpExternal Gear PumpInternal Gear Pump (Without Crescent)

Screw

S A d Wh l PScrew And Wheel PumpSingle Screw Pump

Two Screw Pump Three Screw Pump

ReciprocatingReciprocatingp gp g

Power PumpPower Pump

Power PumpPower Pump

H i t l Si l ti Horizontal Single-acting Plunger Power Pump

V ti l Si l ti Vertical Single-acting Plunger Power Pump

Horizontal Double-acting Piston Power Pump

CONTROLLED VOLUME PUMPS

Liquid End Assembly, Controlled Volume Plunger Pump

Hydraulically Actuated Mechanically Actuated

Diaphragm Pump

Hydraulically Actuated Diaphragm Pump

STEAM PUMPSTEAM PUMP

Cross-sectional Drawing of a Steam Pump. Steam End is on Left. Liquid End is on Right.