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Pump classifcation

Hydrodynamic (or) non-positive displacement

pumps

Hydrostatic (or) positivedisplacement pumps


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Carries fuid rom one location to another,relatively at low pressure (17-21 bar).

enerally used or low pressure, hi!h-volume, fow applications.

"hese pumps are not sel-primin!, as thereis a !reat deal o clearance between therotatin! and stationary elements.

Cannot create enou!h vacuum at its inlet,hence dischar!e rate is low.

#$amples%.. a) Centriu!al pumps b) &$ial fow propeller pump."hese pumps are called as non-positive

displacement pumps.

HYDRODYNAMI P!MP"


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Hydrostatic pumps

'ydrostatic pumps uses fuid pressure totransmit power.

"hese pumps have very close-ttin!matin! components and hence a very

small amount o leaa!e could occur."hese pumps may be either%.. a) *i$ed displacement b) +ariable displacement"hese pumps reuires protection a!ainst

over pressure i the resistance to fowbecomes very lar!e or innite, so pressurerelie valve is provided.

t is also called as positive displacement

pumps.


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C&//*C&"0 0* 3

#$ARP!MP

"

%AN$P!MP

"

PI"&ONP!MP"


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#4"#5& #&5 6


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Common e$ternal !ear pumpapplications include, but are not limitedto8+arious uel oils and lube oilsChemical additive and polymermeterin!

Chemical mi$in! and blendin!(double pump)ndustrial and mobile hydraulicapplications (lo! splitters, lits, etc.)

&cids and caustic (stainless steel or

&C&"0


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"#5& #&5 6


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Common internal !ear pump applicationsinclude, but are not limited to8&ll varieties o uel oil and lube oil5esins and olymers

&lcohols and solvents&sphalt, 9itumen, and "arolyurethane oam (socyanate and polyol)*ood products such as corn syrup,

chocolate, and peanut butteraint, ins, and pi!ments/oaps and suractantslycol

&C&"0


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09# 6


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Common rotary lobe pump applicationsinclude, but are not limited to8

olymersaper coatin!s/oaps and suractantsaints and dyes5ubber and adhesivesharmaceuticals*ood applications

&C&"0


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#50"05 6


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3 pumps are ound in a wide ran!e oapplicationchemical-processin!

liuid deliverymarinebiotechnolo!ypharmaceutical

as well as ood, dairy, and bevera!eprocessin!."heir versatility and popularity is due inpart to their relatively compact desi!n, hi!h-viscosity perormance, continuous fow

re!ardless o di


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+ 6/


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&erosol and ropellants&viation /ervice - *uel "ranser,

3eicin!

&uto ndustry - *uels, ubes,5eri!eration Coolants9ul "ranser o and '= Cylinder *illin!&lcohols5eri!eration - *reons, &mmonia/olvents

&ueous solutions

&C&"0


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&4& /"0 6


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5&3& /"0 6


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Centriu!al pump


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/ubmersible pump


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NON-POSITIVE

DISPLACEMENT PUMPS

POSITIVE DISPLACEMENT

PUMPS

provide a smooth, continuousfow

pulse with each stroe or eachtime a pumpin! chamber

opens to an outlet port.

ressure can reduce a nonpositive pump>s delivery. 'i!houtlet pressure can stop anyoutput? the liuid simplyrecirculates inside the pump

n a positive-displacementpump, pressure a


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P$R'ORMAN$ O'

P!MP

umps are usually rated accordin! to theirvolumetric output and pressure.

+olumetric output (delivery rate or capacity) is theamount o liuid that a pump can deliver at its outletport per unit o time at a !iven drive speed, usuallye$pressed in or cubic inches per minute.

umps are sometimes rated accordin! todisplacement, that is the amount o liuid that theycan deliver per cycle or cubic inches per revolution.

&s pressure increases, volumetric output decreases."his drop in output is caused by an increase in

internal leaa!e (slippa!e) rom a pump>s outlet sideto its inlet side

/lippa!e is a measure o a pump>s e@ciency andusually is e$pressed in percent.


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6 #**C#C#/

+olumetric #@ciency8A B &ctual fow rate B a "heoretical fow rate tear pumps B DE-FE G

+ane pumps B D2-F2 Giston pumps B FE-FD Gechanical #@ciency8A B 0utput power B o nput power iechanical e@ciency varies rom FE to FH G0verall #@ciency8A B &ctual power delivered by the pump B'ydraulic power &ctual power delivered to the pump9rae power


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1. ;;;.6//C'00.C02. 'I35&6C/ &3

#6&"C/ 9y "./under

/elwyn, 5.Jayendiran=. www.authorstreem.com.
http://www.pumpsschool.com/http://www.authorstreem.com/http://www.authorstreem.com/http://www.pumpsschool.com/


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