pump selection guideline

GENERAL GUIDELINE FOR PUMP SELECTIONGENERAL GUIDELINE FOR PUMP SELECTIONCLASSIFICATION & CHARACTERISTICCLASSIFICATION & CHARACTERISTIC

PUMPPUMP

DISPLACEMENT TYPECENTRIFUGALCENTRIFUGAL*Note 1

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DISPLACEMENT TYPECENTRIFUGALCENTRIFUGAL*Note 1

RECIPROCATINGRECIPROCATING*Note 2

ROTARYROTARY*Note 3

*Note 2 : Pressurize or dischargeliquid by reciprocating motionof piston or a plunger

*Note1 : Pressurizes liquids bymeans of centrifugal forceof its impeller.

Note 3 : Pressurize or dischargeliquid by rotary motion of agear, a screw or a vane

PERFORMANCE CURVE CHARACTERISTICPERFORMANCE CURVE CHARACTERISTIC

H Pd-Ps Pd-Ps

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QCentrifugalPump

QRotary Pump QReciprocatingPump

TABLE SHOWING VARIOUS PUMP CHARACTERISTICSTABLE SHOWING VARIOUS PUMP CHARACTERISTICSCONDITION CENTRIFUGAL

PUMPROTARY PUMP RECIPROCATING

PUMP1. Discharging state Stable Stable Impulsation

2. For Slurry Can be used with specialdevices

Not used, in general Not used, in general

3. For viscous fluids Big drop in performance Better inperformance

A little drop in performance

4. Pressure Wide range of use Applicable up tointermediatepressure

Wide range of use

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Applicable up tointermediatepressure

5. Capacity Wide range of use (notsuitable for small flow)

Not suitable for largeflow

Not suitable for large flow

6. When dischargepress. increases

Big decrease in flow rate Almost no change inflow rate

Almost no change in flowrate

7. When dischargepressure decreases

Large increase in flowrate

Almost no change inflow rate

Almost no change in flowrate

8. Flow rateadjustment

Possible by open/ closeof discharge valve orchange in speed

Possible by bypassor change in speed

Possible by bypass, orchange in speed or strokelength

9. Pressureadjustment

Narrow range ofadjustment

Wide range ofadjustment

Wide range of adjustment

SCOPESCOPE CENTRIFUGAL PUMP (Most economical)CENTRIFUGAL PUMP (Most economical)

(

CENTRIFUGAL PUMP (CP)CENTRIFUGAL PUMP (CP)

CLASSIFICATION & CHARACTERISTICS OF CPCLASSIFICATION & CHARACTERISTICS OF CPA.A. BY IMPELLERBY IMPELLER

i.i. Axial flow pumpAxial flow pumpii.ii. Mixed flow pumpMixed flow pumpiii.iii. Centrifugal pump (Radial Flow)Centrifugal pump (Radial Flow)

CLOSEDSEMI OPENOPEN TYPE

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OPEN TYPE

B.B. BY INSTALLATIONBY INSTALLATIONi.i. Horizontal PumpHorizontal Pump Mostly used due to economicalMostly used due to economical & maintenance& maintenanceii.ii. Vertical PumpVertical Pump Application which need higher suctionApplication which need higher suctionperformance (NPSH)performance (NPSH)iii.iii. In line pumpIn line pump In the line of piping , used in restrictedIn the line of piping , used in restrictedinstallation spaceinstallation space

C.C. BY CASINGBY CASINGi.i. Volute pumpVolute pump Casing made in the form of a spiral or voluteCasing made in the form of a spiral or voluteii.ii. Turbine pumpTurbine pump Casing equipped with diffuserCasing equipped with diffuser(diffuser pump)(diffuser pump)

D.D. By Number of ImpellersBy Number of Impellersi.i. Single or double stageSingle or double stageii.ii. Multi stageMulti stage

CENTRIFUGAL PUMP (CP)CENTRIFUGAL PUMP (CP)

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B.B. BY INSTALLATIONBY INSTALLATIONi.i. Horizontal PumpHorizontal Pump Mostly used due to economicalMostly used due to economical & maintenance& maintenanceii.ii. Vertical PumpVertical Pump Application which need higher suctionApplication which need higher suctionperformance (NPSH)performance (NPSH)iii.iii. In line pumpIn line pump In the line of piping , used in restrictedIn the line of piping , used in restrictedinstallation spaceinstallation space

C.C. BY CASINGBY CASINGi.i. Volute pumpVolute pump Casing made in the form of a spiral or voluteCasing made in the form of a spiral or voluteii.ii. Turbine pumpTurbine pump Casing equipped with diffuserCasing equipped with diffuser(diffuser pump)(diffuser pump)

D.D. By Number of ImpellersBy Number of Impellersi.i. Single or double stageSingle or double stageii.ii. Multi stageMulti stage

Application Range of Centrifugal Pumps at 50 Hz AreaApplication Range of Centrifugal Pumps at 50 Hz Area

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SPECIAL PUMP1. Sundyne Pump

High speed pump

When single or double stage centrifugal pump cannotcovered the application, Sundyne pump shall be considered.

Multi stage performance from a single unit

Small foot print

Simple design

Standard or engineered options

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1. Sundyne Pump High speed pump

When single or double stage centrifugal pump cannotcovered the application, Sundyne pump shall be considered.

Multi stage performance from a single unit

Small foot print

Simple design

Standard or engineered options

Performance Envelope LMV/BMP SeriesPerformance Envelope LMV/BMP Series

PERFORMANCEPERFORMANCE

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2. Non Seal Pump Pump without shaft seal Suitable on handling liquid when no leakage allowed Motor cooling & bearing lubrication are by self liquid

SPECIAL PUMPSPECIAL PUMP

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3.3. Magnet Drive PumpsMagnet Drive Pumps Magnetic drive pumps have a single leak containment shell butMagnetic drive pumps have a single leak containment shell but

many factors lead to containment shell rupture and unpredictable,many factors lead to containment shell rupture and unpredictable,massive increase in leakage.massive increase in leakage. 6 pump / frame / motor bearings6 pump / frame / motor bearings CouplingCoupling Alignment criticalAlignment critical Vulnerable single leak containment shellVulnerable single leak containment shell No bearing monitorNo bearing monitor

SPECIAL PUMPSPECIAL PUMP

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3.3. Magnet Drive PumpsMagnet Drive Pumps Magnetic drive pumps have a single leak containment shell butMagnetic drive pumps have a single leak containment shell but

many factors lead to containment shell rupture and unpredictable,many factors lead to containment shell rupture and unpredictable,massive increase in leakage.massive increase in leakage. 6 pump / frame / motor bearings6 pump / frame / motor bearings CouplingCoupling Alignment criticalAlignment critical Vulnerable single leak containment shellVulnerable single leak containment shell No bearing monitorNo bearing monitor

CP SELECTION GUIDELINECP SELECTION GUIDELINE1)1) Consider the most economicalConsider the most economical horizontal typehorizontal type single or double stagesingle or double stage

pump within the application.pump within the application. The pump has the following types;The pump has the following types;

A.A. In Support TypeIn Support Typei.i. Bracket support typeBracket support type

-- for water pump / suitable for packing sealfor water pump / suitable for packing seal

ii.ii. Foot support type (for ISO, ANSIFoot support type (for ISO, ANSI -- mid class mech. seal)mid class mech. seal)-- ISO [medium duty, designed for 16 bars in pressure underISO [medium duty, designed for 16 bars in pressure undernormal temperature]normal temperature]

iii.iii. Centerline supportCenterline support-- for API, high quality, high temperature.for API, high quality, high temperature.-- APIAPI Liquid above 180C centerline is preferable.Liquid above 180C centerline is preferable.-- designed for min 40 bar at 38Cdesigned for min 40 bar at 38C

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1)1) Consider the most economicalConsider the most economical horizontal typehorizontal type single or double stagesingle or double stagepump within the application.pump within the application. The pump has the following types;The pump has the following types;

A.A. In Support TypeIn Support Typei.i. Bracket support typeBracket support type

-- for water pump / suitable for packing sealfor water pump / suitable for packing seal

ii.ii. Foot support type (for ISO, ANSIFoot support type (for ISO, ANSI -- mid class mech. seal)mid class mech. seal)-- ISO [medium duty, designed for 16 bars in pressure underISO [medium duty, designed for 16 bars in pressure undernormal temperature]normal temperature]

iii.iii. Centerline supportCenterline support-- for API, high quality, high temperature.for API, high quality, high temperature.-- APIAPI Liquid above 180C centerline is preferable.Liquid above 180C centerline is preferable.-- designed for min 40 bar at 38Cdesigned for min 40 bar at 38C

B.B. In Bearing Support TypeIn Bearing Support Typei.i. Overhung support typeOverhung support type -- Overhung impeller (for single suctionOverhung impeller (for single suction

pump)pump)-- When select overhung double stageWhen select overhung double stageoverhung double suction engineeroverhung double suction engineerneed to give extra attention as it isneed to give extra attention as it isprohibited in API.prohibited in API.

ii.ii. Between bearing support typeBetween bearing support type -- Suitable for double suctionSuitable for double suctionmultistage pump. Need twomultistage pump. Need twoshaft seals.shaft seals.

Pay attention to :Pay attention to : Client requirementsClient requirements NsNs NPSHNPSH Pressure ratingPressure rating

CP SELECTION GUIDELINECP SELECTION GUIDELINE

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B.B. In Bearing Support TypeIn Bearing Support Typei.i. Overhung support typeOverhung support type -- Overhung impeller (for single suctionOverhung impeller (for single suction

pump)pump)-- When select overhung double stageWhen select overhung double stageoverhung double suction engineeroverhung double suction engineerneed to give extra attention as it isneed to give extra attention as it isprohibited in API.prohibited in API.

ii.ii. Between bearing support typeBetween bearing support type -- Suitable for double suctionSuitable for double suctionmultistage pump. Need twomultistage pump. Need twoshaft seals.shaft seals.

Pay attention to :Pay attention to : Client requirementsClient requirements NsNs NPSHNPSH Pressure ratingPressure rating

2)2) Vertical PumpVertical Pump Used when horizontal pump cannot attain necessary NPSHUsed when horizontal pump cannot attain necessary NPSHrequirement or its improvement requires a lot of cost.requirement or its improvement requires a lot of cost.

3)3) High Head PumpHigh Head Pump Before decide Sundyne , investigate the use of multistageBefore decide Sundyne , investigate the use of multistagepump as well.pump as well.

4)4) Multi Stage PumpMulti Stage Pump TypesTypesA.A. Horizontal multistage pumpHorizontal multistage pump

i.i. Horizontal Split CasingHorizontal Split Casingii.ii. Vertical Split Casing (RingVertical Split Casing (Ring segmental type)segmental type)iii.iii. Barrel CasingBarrel Casing


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2)2) Vertical PumpVertical Pump Used when horizontal pump cannot attain necessary NPSHUsed when horizontal pump cannot attain necessary NPSHrequirement or its improvement requires a lot of cost.requirement or its improvement requires a lot of cost.

3)3) High Head PumpHigh Head Pump Before decide Sundyne , investigate the use of multistageBefore decide Sundyne , investigate the use of multistagepump as well.pump as well.

4)4) Multi Stage PumpMulti Stage Pump TypesTypesA.A. Horizontal multistage pumpHorizontal multistage pump

i.i. Horizontal Split CasingHorizontal Split Casingii.ii. Vertical Split Casing (RingVertical Split Casing (Ring segmental type)segmental type)iii.iii. Barrel CasingBarrel Casing

B.B. Vertical Multistage PumpVertical Multistage Pump Generally if NSPH allowed, a horizontal & multistage pumpGenerally if NSPH allowed, a horizontal & multistage pump

should be selected instead of sundyne due to easyshould be selected instead of sundyne due to easymaintainability. However under following conditions it ismaintainability. However under following conditions it isadvised not to use horizontal split casing.advised not to use horizontal split casing.

Liquid temperature > 205CLiquid temperature > 205C Flammable or toxic liquid with S.G < 0.7Flammable or toxic liquid with S.G < 0.7 Flammable or toxic liquid with discharge pressure 69Flammable or toxic liquid with discharge pressure 69

bars.bars. API prohibited vertical split casing (ring segmental type) since itAPI prohibited vertical split casing (ring segmental type) since it

cannot be disassembled unless a pump casing is removedcannot be disassembled unless a pump casing is removedfrom main piping.from main piping.

Normally adopted is many case of BFW due to less priceNormally adopted is many case of BFW due to less pricecompared to Barrel type.compared to Barrel type.


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B.B. Vertical Multistage PumpVertical Multistage Pump Generally if NSPH allowed, a horizontal & multistage pumpGenerally if NSPH allowed, a horizontal & multistage pump

should be selected instead of sundyne due to easyshould be selected instead of sundyne due to easymaintainability. However under following conditions it ismaintainability. However under following conditions it isadvised not to use horizontal split casing.advised not to use horizontal split casing.

Liquid temperature > 205CLiquid temperature > 205C Flammable or toxic liquid with S.G < 0.7Flammable or toxic liquid with S.G < 0.7 Flammable or toxic liquid with discharge pressure 69Flammable or toxic liquid with discharge pressure 69

bars.bars. API prohibited vertical split casing (ring segmental type) since itAPI prohibited vertical split casing (ring segmental type) since it

cannot be disassembled unless a pump casing is removedcannot be disassembled unless a pump casing is removedfrom main piping.from main piping.

Normally adopted is many case of BFW due to less priceNormally adopted is many case of BFW due to less pricecompared to Barrel type.compared to Barrel type.

5)5) Non Seal PumpNon Seal Pump Avoid leakageAvoid leakage Extreme low temperature (e.g. LNG)Extreme low temperature (e.g. LNG) Common use (7.5 to 11 kW)Common use (7.5 to 11 kW)


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5)5) Non Seal PumpNon Seal Pump Avoid leakageAvoid leakage Extreme low temperature (e.g. LNG)Extreme low temperature (e.g. LNG) Common use (7.5 to 11 kW)Common use (7.5 to 11 kW)

RECIPROCATING PUMP (RP)RECIPROCATING PUMP (RP) Classification and Characteristics of Reciprocating Pumps

Classification of reciprocating pump is as follows:

Max cap : 250 m/hPd max : 600 bars

Simplex

Duplex

Multiplex

Piston

Plunger

Single Acting

Double Acting

Horizontal

VerticalPower

ReciprocatingPump

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Simplex

Cap : 10 m/hrPd : 500 bars (small

plunger diameter): 10 bars (largeplunger diameter)

-Pressure limitation(Check)-Temperature islimited to 150C

Duplex

Multiplex

Plunger

Piston

Diaphragm

Horizontal

VerticalControlledVolume

ReciprocatingPump

RP SELECTION GUIDERP SELECTION GUIDE

Small capacity several /hr to several hundred /hr , a controlledvolume is selected. Unless special process conditions given.

If do not need controlled volume and bigger capacity type shall bedecided by comparing cost between power pump & controlledvolume pump.In case used capacity control for power pump, please utilize speedvariator or VSC.

Sometime utilize steam (air), where it is called steam (air ) pistonpump , application up to 350 m/hr &15 bars pressure.

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Small capacity several /hr to several hundred /hr , a controlledvolume is selected. Unless special process conditions given.

If do not need controlled volume and bigger capacity type shall bedecided by comparing cost between power pump & controlledvolume pump.In case used capacity control for power pump, please utilize speedvariator or VSC.

Sometime utilize steam (air), where it is called steam (air ) pistonpump , application up to 350 m/hr &15 bars pressure.

ROTARY PUMPROTARY PUMP Classification and Characteristic of Rotary Pump

VaneBlade, bucket,

Roller orVane in Rotor Constant Displacement

Variable Displacement

Single PistonMulti Piston

Constant DisplacementVane in Stator

Variable Displacement

Constant DisplacementVariable Displacement

Slipper

Flexible Tube

Axial

RadialPiston

RotaryPumps

* Widely used . Usedhandling liquid tolubricatelubricating metalfriction.

> 10Cp viscosity isrequired

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Flexible TubeFlexible VaneFlexible Liner

SingleMultipleSingleMultipleScrew

CircumferentialPiston

ExternalInternalGear

SingleMultipleLobe

Flexible MemberRotaryPumps

(External gear engagement)(Internal gear engagement)

Low viscosityliquid also can

used

(Liquid near solid nature)(Liquid which contain some slurry)

* Widely used . Usedhandling liquid tolubricatelubricating metalfriction.

> 10Cp viscosity isrequired

**

SCOPESCOPE

Gear Pump Std. pump are for low pressure (max dis.= 10kg/cmG) Min & medium flow rate (max 300m/hr)

Screw Pump For medium / high press. (max 100 kg/cmG) Medium & large flow rate ( max 1500m/hr)

RP Selection Guide1. Viscous liquid ~ rotary pump is preferable2. Gear pump is the most economical if pressure & flow

allows3. Then if P&Q high screw pump is preferable

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Gear Pump Std. pump are for low pressure (max dis.= 10kg/cmG) Min & medium flow rate (max 300m/hr)

Screw Pump For medium / high press. (max 100 kg/cmG) Medium & large flow rate ( max 1500m/hr)

RP Selection Guide1. Viscous liquid ~ rotary pump is preferable2. Gear pump is the most economical if pressure & flow

allows3. Then if P&Q high screw pump is preferable

pump selection guideline

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