8/11/2019 bpump

1/25

2001 Goulds PumpsEffective August, 2001 www.goulds.com

ResidentialPump Fundamentals

Goulds Pumps and the ITT Engineered Blocks symbol areregistered trademarks and tradenames of ITT Industries.

http://www.goulds.com/http://www.goulds.com/

8/11/2019 bpump

2/252

Sources of WaterA source of water or a well is often referred to as shallow or deep.These terms are referring to the depth of the water source or well.

A shallow well is one where the water is within 2 feet of the ground

surface. A deep well is where the static water level is more than 2 feet

down.

The standing water level in a well is called the static level. This is thewater level when the pump is not operating. !hen the pump comes on

and is running there often is a change in the water level. This is referredto as drawdown. The drawdown occurs and the water level reacheswhat is referred to as the pumping level. This is the operating level ofthe pump. The lowest level to which the water will drop is the level fromwhich it must "e pumped.

#riven !ell #rilled !ell #ug !ell $istern %pring, &a'e, or

%urface !ater

2 ft.

A Shallow Well(s an) source of water where the water is within 2 feet of ground level. !hen water is pumped from a well the

water level will draw down. The lowest level to which it will drop is the level from which it must "e pumped.

#riven !ell #rilled !ell #ug !ell

2 ft.

Draw

Down

Static Level

PumpingLevel

A Deep Well(s an) source of water where the low water level is more than 2 feet "elow the ground level.

8/11/2019 bpump

3/25

Pump

*

Typical Jet Pump Installations

SHALLOWWLL S!ST"

TWI# PIPDPWLLS!ST"

PA$%&DPWLLS!ST"

+se chec'valve hereor foot valveat end ofsuction pipe.

Shallow Well Jet Pump(n a shallow well et s)stem,

the et assem"l) is fastened

to the outside of the centrifu-

gal pump as illustrated. r

the et assem"l) can "e "uiltinto the centrifugal pumpcasing.

(n either case there is onl)

one pipe e/tending into the

well or source of water

the suction pipe.

Deep Well Jet PumpA deep well et s)stem is

"asicall) the same as a

shallow well s)stem withone maor difference

the et assem"l) is

separate from the

centrifugal pump,located in the well,

usuall) "elow the

pumping level of the

water, and piped to the

centrifugal pump withtwo pipes. A suctionpipe and a pressure ordrive water pipe.

AW '(ADAPT&

Typical )oul*s Jet Pump Installations

(+PIPPITLSSADAPT&

O,& TH WLL

8/11/2019 bpump

4/25

Pump Types

Typical Su-mersi-le Pump Installation

Goulds Pumps

Goulds 3su"mersi"lepump with alightning

protectedmotor. Twoorthree wiremodelsavaila"le.

Pressure Tan.ffers water storage forfewer pump c)cles.Provides air cushion tooperate against. Tan'should "e si4ed so thatdraw down is e5ual tocapacit) of pump.

8/11/2019 bpump

5/25

The / 0asic

1uestions

2 $apacity #ee*e*6ow "ig must the pump "e7

( Well $on*itions(s a shallow or deep well pump needed7

/ Discharge $on*itions6ow much pressure is needed7

The illustration a"ove poses a t)pical water s)stem pro"lem. The source of water is in nearl)all cases lower than the house or "uilding. This is wh) a pump is needed to raise the waterup

to the faucets and fi/tures. These are the three 5uestions to "e considered

2 $apacity #ee*e*6ow much water in gallons per hour or gallons per minute are needed7 This determines what si4e pump to use.

( Well $on*itions!hat is the total suction lift7 !hat is meant ") 8total suction97 !e learn from this what to e/pect from a

shallow well pump and when and wh) to use a deep well pump.

/ Discharge $on*itions6ow much pressure is needed at the pump7 6ow much pressure will result at the faucet7

!henever and wherever a pump is to "e used, the correct answers to these three 5uestions will tell the actual

pumping conditions or specificall) what is re5uired of the pump. !ith this information, )ou can alwa)sselect the right pump from the catalog.

8/11/2019 bpump

6/256

2 $apacity #ee*e*6ow much water is availa"le76ow much water is needed76ow large must the pump "e7

Limiting 3actors

6ow much water is

availa"le7 :efore we

select a pump "ased on

need we must determineif the suppl) is ade5uate.

;an) areas have what werefer to as low )ield wells,

!ell recover) rates ma) "e

as low as 1 GP; or less.

A t)pical low )ield

8/11/2019 bpump

7/257

2*?

Piping'itchen sin' to showerhead e5uivalent length 20?

Pipingpump tan' to 'itchensin', e5uivalentlength *0?

%taticwater level,pump notrunning

Pumpingwater level,pumprunning

Deman*

10?

*0?

20?

availa"le is used and

man) users are dissatisfied

with the results. The)eithercant ta'e a shower or fill a

tu" while sprin'ling the

lawn, or if a toilet is

flushed when ta'ing a

shower, the showerdiminishes to a dri""le, or

some similar interruption

occurs. The trou"le of

course is that the

The rate of flow from a

faucet or fi/ture dependson its t)pe and si4e, the

length and si4e of pipesuppl)ing it and the

difference in elevation

"etween it and the pumpor tan'. >urthermore,it is

impossi"le to determine ")sight the e/act rate of flow"eing delivered from a

This of course is not

alwa)s practical. Thecapacit) of pumpschanges with pumpingconditions such as

pumping level of the water

and the operating

pressure.Accordingl), it is

good practice to provide apump capacit) for the

average home of from 10

to 12 gpm when availa"le.

The capacit) re5uired ofthe pump is determined ")the num"er of continu-

ousl) flowing demands

8/11/2019 bpump

8/258

%hower in usesame time as'itchen sin'faucet on.

2 continuous uses re5uire G.P.;.minimumThe capacit) re5uired ofthe pump is determined ") the num"er of continuous useoutlets in use at the same time. Jou can?t use water at one or a num"er of outletsan) faster than the pump supplies it.

8/11/2019 bpump

9/259

( Well $on*itions

The level of the water to

"e pumped is practicall)

alwa)s "elow ground. (t

can "e onl) a few feet

as in a spring, shallow

well, pond, etc., or it can

"e man) feet as in a

deep well. (f we could

alwa)s locate thepumping mechanism in

the water, as we do with

su"mers- i"le pumps, our

pro"lem

e5ual to a"out 1.B l"s.

per s5uare inch at sea

level. !hen the pressure

of atmosphere is removed

from inside of a pump the

resulting condition is a

vacuum or partial

vacuum. (t is also called

suction.

The vacuum or suction

cham"er of a pump is

piped irst, lets consider terms

of measurement and theirrelation to each other.

Pressure is usuall) e/-

pressed in pounds pers5uare inch romthis we can

(;A7

,&TI$AL LI3TPL

,acuum)auge a"ove sea level. The total

suction lift would onl) "e2L.@ ft. not **.@ ft. li'e at

sea level.

1. The atmosphere allaround us has weight and

therefore e/erts pressure

AtmosphericPressure

AtmosphericPressure

2'78 L0S7

Water Level

Tr) to lift soda from a "ottle ")closing )our mouth over themouth of the "ottle. (t cant "edone. !hen )ou use a straw, itis eas) 0 )ou are creating apartial vacuum in )our mouth,e/posing the surface li5uid toatmospheric pressure, thedifference in pressure raises the

li5uid.

A reading of 203 on a vacuum

gauge placed on a suction sideof the pump would tell )outhat)ou had a vacuum orsuction lift of 22. ft.

203 / 1.1*? K 22. ft.

8/11/2019 bpump

10/25

TTA& &EIGT6 > %+$T(I P(PE (% 100 $APA$T(J > P+;P (%B GA&&I% PEM ;(I+TE

B ft.%TAT($ &EDE& > !ATEM

2* ft. DEMT($A& &(>T !ATEM

>M($T(I > B GP;(I 100 >T. > P(PE 13 K *.? 11/3K .@*?

TTA& %+$T(I &(>TK 2.? . . . . . . . . . 2?

:D(+%&J 11/3P(PE ;+%T :E +%E#.

Summing this up5 !henthe atmospheric pressureis1.B l"s. per s5. inch aperfect vacuumshould "e *0 inches andthis would lift water ")suctionto a height of **.@ ft.

;ost shallow well or suctionpumps are capa"le ofdeveloping a near perfectvacuum, and at sea levelthe) can lift water a"outthirt) feet. 6owever,suctionlifts of more than 2 ft.at sea level are notrecom-mended. %hallow welletpumps deliver inade5uatecapacit) on lifts over 2ft.

%uction conditions, ortotalsuction lift must include all

resistances to the flow of thewater through the suctionpipe up to the pump. 6eightor vertical lift is one resis-tance. >riction"etween thewater and the pipe walls isthe other resistance.

waste the least possi"leamount of wor'. Neepin mind that all wor'"eing done on thesuction side of the pumpis actuall)performed ") thepressure of atmosphere.%ince in

common practice weconsider this pressureissufficient to overcome onl)2 ft., the 2 ft. mustalwa)s include an) lossesdue tofriction.

!e dont have to "e tooconcerned with how or wh)friction loss is incurred, "ut itis essential that we accept itas occurring alwa)s whenwater flows through pipes. (tis, also, most essential thatwe understand how it ismeasured.(n our discussion of suctionlift, atmospheric pressureand the height thispressure will raise water,we esta"- lished the factthat 1.B l".

pressure will raise water to aheight of **.@ ft.Althoughthere is no relation "etweenatmospheric pressure andfriction loss, the relation"etween pounds pressureand feet elevation or headas we call it, is thesame whether the

pressure iscoming from atmosphere oran) other source. %o, asstated "efore, 1.B l"s.pressure from an) sourcewill raise water **.@ ft. andthis gives us the conversionfactor to change our termsfrom pressure to feet or thereverse of this. Therefore,1 l". of pressure is alwa)se5ual to 2.*1 ft.

8/11/2019 bpump

11/25

8/11/2019 bpump

12/2512

/ Discharge$on*itions

!hat are the conditionsunder which the waters)stem must discharge itscapacit)7

The capacit) of thepump has alread) "eenesta"- lished so we arenow concerned onl) withthe

!ould )ou rather haveat a faucet one gallonper minute at a hundredpounds pressure or tengallons per minute at tenpounds pressure7 !hichwill fill a tu" 5uic'er7

100 10

friction loss in feetcalculated and changed topounds pressure M($T(I &%%7

E&EDAT(I7

some e/planation is inorder. Ouite often it isstated that a particularpump is delivering suffi-cient capacit) "ut failsto

develop ade5uatepressure. (n most cases thisis a misstatement and theopposite condition is true.This complaint is generall)made when a particulars)stem fails to providesufficient flow throughseveral outlets at thesame

Iow as to the resistance toflow which will "e encoun-tered, there are threecauses. These are rictionPump capacit) is B gpmThis flow through 200 ft.of 13 pipe gives a frictionloss of *.0 l"s. .................. * l"s.

*0P%(

2*?

time. This is caused in mostcases ") the demand inrate of flow "eing greaterthan the capacit) of the

s)stem. (f the s)stem hassufficient capacit) to suppl)the ma/imum num"er ofoutlets which are li'el) to"e used at the sametime,our onl) concern withpressure is that wehave sufficient pressureto

overcome the resistanceto flow which will "eencountered. (f )ou havean) dou"ts a"out this,

consider )our answer

to this 5uestion installed at the house, andthe standard pressurerange of the s)stem issufficient to overcome

these resistances anddeliver its capacit) to thevarious outlets. An e/amplein which these computa-tions must "e made iswhen the pump or s)stemis located at considera"ledistance from the point ofuse and on a lowerelevation.

(n such a case the differ-ence in elevation must "edetermined

8/11/2019 bpump

13/2513

200? 13 P(PE E&ED AT(I

8/11/2019 bpump

14/2514

Jet SystemsThe first 5uestion with Cet Pumps is what is the suction

cham"er and how is the vacuum created.

The Cet Assem"l) itself forms the suction cham"er andthe vacuum is created ") the ver) high velocit) of a

stream of water passing through the et. :asicall), theetassem"l) is composed of two parts. >irst, a no44le which

produces the high velocit) stream of water. This highvelocit) stream of water is inected through a small

compartment which is the suction cham"er, there")causing the vacuum. "viousl), the suction pipe is

connected to this compartment or suction cham"er. Thevacuum caused ") the et permits the greater pressure ofatmosphere on the surface of a "od) of water to force

water into the suction cham"er.

The second "asic part of the Cet Assem"l) is the venturi

tu"e. (t is installed in the discharge of the suction

cham"er. (ts function is to convert the velocit) of the

water into pressure. This is accomplished ") the shape

of its water passage. Perhaps )ou can "est visuali4e this") thin'ing of a no44le in reverse. The no44le speeds up

the flow of the drive water converting pressure into

velocit) and when it has passed through the suction

cham"er,the venturi slows it down again converting the velocit)

"ac' into pressure.

8#rive water9 is that water which is piped under pres-

sure to the et assem"l) or suction cham"er. The dis-

charge from the suction cham"er or et assem"l) is

composed of "oth the drive water and that water

pumped from the well. The total amount pumped fromthe well can "e used as discharge from the s)stem and

is the output or capacit).

Shallow Well Jet Pump>romthe foregoing discussion it is o"vious that theoperation of the Cet s)stem is dependent on the com-

"ined functions of "oth the Cet Assem"l) or suctioncham"er and the centrifugal pump. Also, that these twomain components of the s)stem are entirel) separate

and their locations with respect to each other is a

matter of design.

Types of Pumps

(n shallow well et pumps the et assem"l) is "uilt intothe pump casing as in the Goulds Pumps C%. r, the

et assem"l), shallow well adapters, can "e "olted tothe centrifugal pump. (n either case there is onl) one

pipe e/tending into the well . . . the suction pipe.Deep Well Jet PumpThe onl) "asic or fundamental difference "etween

%hallow !ell and #eep !ell Cet Pumps is the location of

the CetAssem"l). (t must alwa)s "e located in such a

position that the total suction lift "etween it and thepumping level of the water to "e pumped does note/ceed that which can "e overcome ") the pressure of

atmosphere. This, ofcourse, means that when this pumping level is at a

distance lower than the ground level which cannot "eovercome ") atmospheric pressure, the Cet Assem"l) must

"e located at least five feet "elow the low water in thewell.

!e must have a closed compartment in which to installthe no44le and the venturi and to form the suction

cham"er. This part is called the et "od). (ts shape is suchthat it will fit into the casing of a drilled well and the pipe

connections

are located for accessi"ilit). There are two on the top side,

one for connection to the pressure pipe which supplies the

drive water, the other for connection to the suction pipe

which returns "oth the drive water and the water pumped

from the well. >orthis reason, this connection is one pipe

si4e larger than that for the pressure pipe. !ater from the

well enters through a third opening which is on the"ottom side of the et "od).

The last accessor) for the Cet %)stem is the pressure

control valve. (t is a valve installed in the discharge pipingfrom the centrifugal pump "etween the pump and the

tan' in the pump when the pump is mounted on a tan'.

+sed onl) in deep well s)stems, its purpose it to assure a

minimum operating pressure for theet.

Pressure$ontrolDalve

8/11/2019 bpump

15/2515

I

o4

4

l

e

Denturi

TwinPipe#eep !ellCet Assem"l)

>oot Dalve

8/11/2019 bpump

16/2516

Su-mersi-le Pump%u"mersi"le pumps are so named "ecause the whole

unit, pump and motor is designed to "e operated underwater. This means the pump does not have to "e primed.nce installed and turned on, water flows up the pipe.

The pump end is a multistage

8/11/2019 bpump

17/25

Accessories

!hen appl)ing a pump to an) specific pro"lem pertain-

ing to domestic water suppl), our o"ective in practicall)

ever) case should "e to provide automatic runningwater under pressure a water service compara"le to

that which might "e e/pected from connection to a cit)

water main. :ut, a pump alone can hardl) perform the

several necessar) functions. $ertain other accessories are

necessar), and the com"ination of them all forms what

we call a water s)stem.

alwa)s "e considered. The larger a motor is in horse-

power the more starting power re5uired therefore, the

less fre5uentl) it should "e started.

(t is good practice to si4e the tan' to re5uire the pumpto run at least one minute per c)cle when using frac-tional horsepower motors and two to three minutes forlarger motors.

There are three "asic t)pes of tan's in use toda).

"otorsThe first accessor) is the drive medium which on practi-

call) all water s)stems of toda) is an electric motor.

Jou should remem"er that some of our pumps, in

particular

A(M D&+;E$ITM&

A(M

!ATEM

$onventional or )alvaniBe* Type

Me5uires an air volume control device

to 'eep proper amount of air cushion

in the tan'.

theetpumpsinlarge motorsi4esandsu"mersi"le pumps, are furnished with motors of current characteris-

tics as specified. Therefore, when ordering these, we

must"e advised the electrical characteristics.

Pressure Switch

The ne/t accessor) re5uired is a pressure switch to startand stop the motor automaticall) at a predetermined

pressure.A tu"e connects the switch to some point inthe s)stem on the discharge side of the pump. The

pressure in the s)stem then acts directl) on a diaphragm

in the switch which in turn actuates the contacts in the

>&AT(IG#(%$

#(AP6MAG;

A(M

!ATEM

A(M

!ATEM

A(M DA&DE

3loating Disc Type

#isc helps in preventing water froma"sor"ing air "ut is not a"solute. (t

re5uires periodic replenishment of air

through air valve.

Seale* Diaphragm Type !aterand air are permanentl) separated

") sealed diaphragm therefore,

the amount of air never changes.

The amount of draw-off alsonever

changes.

switch.

Pressure Tan.sThe rate at which water can "e used in a home, school,

motel, or an) other place can "e as little as one gallon a

minute

8/11/2019 bpump

18/25

Summary

Iow lets summari4e

"riefl)the points weEve

covered. !e have shown

that in a water s)stem

application, there are three

factors to consider

1. !ater Ieeded or #eter-mination of $apacit)

2. %uction $onditions, and

*. #ischarge $onditions.

!e have concluded thatcapacit) re5uired is deter-

mined ") the ma/imum

num"er of outlets which

will "e in continuous use

at the same time with a

minimum flow of three

gallons per minute peroutlet.

!e have shown that allet

pumps, whether shallowwell or deep well, have a

water end in which there is

a suction cham"er that the

suction cham"er is actuall)

a closed container in which

a partial vacuum is created.

This allows atmosphericpressure to force in the

water. The suction cham"ermust "e located withina"out 2 feet verticaldistance a"ove the pump-

ing level of the water.

The main difference

"etween shallow well anddeep well pumps is that in

the former the water end is"uilt onto the power end.

The water end of deep well

et pumps is a separate

part. (t is installed in the

water and is used to pumpwater from levels "elow a

2 feet depth. !e have

shown that a su"mersi"le

should "e used when

source will allow. %ince the

su"mersi"le is su"merged

in water onl) dischargeconditions appl). !eve

esta"lished three distinctforms of resistance to flowencountered as #ischarge$onditions and shown thatthe) must "e considered"ut computed onl) in

special cases.Also, that the

pump is onl) part of the

s)stem necessar) to

provide an automatic

service. ther accessoriesare necessar) and weEveesta"lished the need and

function of each of these

accessories.

!e have mentioned *GP; as a minimum

accepta"le flow rate peroutlet. :ut a larger flow

rate is more desira"le and

the following ta"le should"e used as an average

suppl) re5uired when the

source of suppl) will allow

it.

!e would li'e to leave )ouwith one thought. That is,

capacit) and pressure areinversel) related. !hen one

goes up, the other goesdown. Alwa)s chec' the

rating chart or curve of apump to ma'e sure if )ou

raise the pressure )ou willstill receive the needed

suppl) of water at )ouroutlets.

+sing the rating chart

"elow, we would "e

getting L GP; from the

pump at 20 l"s. pressure.

(f we were tr)ing to

suppl) two outlets atonce, this would give us

appro/imatel) GP; at

each one. (f we increasethe pressure to *0 l"s.

pressure, we onl) get

GP; which will give us

appro/imatel) * GP; ateach outlet. :) raising the

pressure we have reduced

the amount of water ateach outlet ") appro/i-

matel) 2Q.

Alwa)s chec' the pumpperformance rating

"efore ma'ing a change.Performance &ating in

)allons per"inute

Seven "inute Pea. Deman* Perio* arm,irrigation and sprin'ling re5uirements are not shown. These values must"e added to the pea' demand figures if usage will occur during normal demand periods.

Pump Discharge Pressure

TotalSuctionLift

(; PSI /; PSI"a47Shut+Offin L-s7

feetL

GP;

GP;1 l"s.

8/11/2019 bpump

19/25

1uestions C

Answers

1. !hat well conditions might possi"l) limit the

capacit) of the pump7

2. 6ow does the diameter of a cased deep well and

pumping level of the water affect the capacit)7

*. (f there are no limiting factors, how is capacit)

determined7

. !hat is suction7

. !hat is atmospheric pressure7

. 6ow much is the pressure due to atmosphere7

B. !hat is ma/imum theoretical suction lift7

L. 6ow does friction loss affect suction conditions7

@. !hen and wh) do we use a deep well et pump7

Mate of flow from the source of suppl), the diameter ofa cased deep well and the pumping level of the water ina cased deep well.

&imits the si4e pumping e5uipment which can"e used.

;a/imum num"er of outlets or faucets li'el) to "e in

use at the same time.

A partial vacuum created in suction cham"er of pumpo"tained ") removing pressure due to atmosphere,

there") allowing greater pressure outside to forcesomething romthis, we o"tain the conversion factorof 1 l". per s5. in. of pressure e5uals 2.*1 ft. head.

The resistance of the suction pipe walls to the flow ofwater uses up part of the wor' which can "e done ")

atmospheric pressure. Therefore, the amount of loss dueto friction in the suction pipe must "e added to the

vertical elevation which must "e overcome and the total

of the two must not e/ceed 2 feet sea level. This 2feet must "e reduced 1 foot for ever) 1,000 feet eleva-

tion a"ove sea level which corrects for a lessened

atmospheric pressure with increased elevation.

!hen the water level is more than 2 feet "elow the

pump "ecause this is the ma/imum practical suctionlift which can "e o"tained with a shallow well pump atsea level.

8/11/2019 bpump

20/25

10. !hat do we mean ") water s)stem7

11. !hat is the purpose of a foot valve7

12. Iame the two "asic parts of a CetAssem"l).

1*. !hat is the function of the no44le7

1. !hat is the purpose of the venturi7

1. !hat do we mean ") 8drive water97

1. !hat is the source of the 8drive water97

1B. !hat is the purpose of the centrifugal pump7

1L. !here is the Cet Assem"l) usuall) located in a

%hallow !ell Cet %)stem7

1@. !hat is the principal factor which determines if a

shallow well et s)stem can "e used7

20. !hen is a deep well et s)stem used7

21. $an a foot valve "e omitted from a #eep !ell Cet

%)stem7 !h)7

22. !hat is the function of a chec' valve in the top ofa su"mersi"le pump7

2*. A su"mersi"le pump is made up of two "asic parts.

!hat are the)7

2. !h) did the name su"mersi"le pump come into"eing7

A pump with all necessar) accessories, fittings, etc.,

necessar) for its completel) automatic operation.

(t is used on the end of a suction pipe to prevent the

water in the s)stem from running "ac' into the source

of suppl) when the pump isnt operating.

Io44le and Denturi.

The no44le converts the pressure of the drive water intovelocit). The velocit) thus created causes a vacuum inthe Cet Assem"l) or suction cham"er.

The venturi converts the velocit) from the no44le "ac'into pressure.

That water which is supplied under pressure to drive the

et.

The drive water is continuousl) recirculated in a closed

s)stem.

The centrifugal pump provides the energ) to circulate

the drive water. (t also "oosts the pressure of the

discharged capacit).

:olted to the casing of the centrifugal pump.

A ma/imum suction lift of 2? at sea level.

!hen the total suction lift e/ceeds 2 ?.

Io, "ecause there are no valves in the Cet Assem"l) and

the foot valve is necessar) to hold water in the s)stem

when it is primed. Also, when the centrifugal pump isnEtrunning, the foot valve prevents the water from running"ac' into the well.

To hold the pressure in the line when the pumpisnEt running.

Pump end and motor.

:ecause the whole unit, pump and motor, is designed to

"e operated under water.

8/11/2019 bpump

21/25

2. A su"mersi"le pump can "e installed in a 23 well7

2. A stage in a su"mersi"le pump is made up of

three parts. !hat are the)7

2B. A su"mersi"le pump has onl) one pipe connection7

2L. !hat are two reasons we should alwa)s considerusing a su"mersi"le first7

2@. The amount of pressure a pump is capa"le ofma'ing is controlled ") what7

*0. The width of an impeller and guide vane controlwhat7

Io, the) re5uired a 3 well or larger for most domestic

use. &arger pumps with larger capacities re5uire 3

wells or larger.

(mpeller, diffuser and "owl.

True, for the discharge pipe.

(t will pump more water at higher pressure with lesshorsepower. Easier installation.

The diameter of the impeller.

The amount of water or capacit) the pump is capa"le ofpumping.

8/11/2019 bpump

22/25

Pro-lems

3riction of Water P& A$H 2;; 3T of #ew Steel Pipe

)P" )PH/?@APipe 2?(APipe /?'APipe 2 Pipe 22?'APipe 22?(APipe ( Pipe (2?(APipe / Pipe

3t7 L-s7 3t7 L-s7 3t7 L-s7 3t7 L-s7 3t7 L-s7 3t7 L-s7 3t7 L-s7 3t7 L-s7 3t7 L-s7 3

1 0 .*0 1.L 1.L .L1 0.2 0.11

2 120 1.00 .@ .BL 2.0B 1.21 0.2 0.*L 0.1

* 1L0 *1.L0 1*.BB 10.00 .** 2.0 1.0L 0.BB 0.**

20 .@0 2*.BB 1B.10 B.0 .21 1.L2 1.*0 0. 0.* 0.1

*00 L*.0 *. 2.L0 11.1B .*2 2.B 1.@* 0.L 0.1 0.22 0.2 0.10

*0 *.0 1.L0 L.LB *.L 2.L 1.1 0.B0 0.*0 0.** 0.1 0.10 0.0B 20 L.B0 21.0L 11.L0 .11 *. 1. 0.@* 0.0 0. 0.1@ 0.1* 0.0

L L0 2.B0 2B.1 1.00 .@ . 1.@B 1.1L 0.1 0. 0.2 0.1B 0.0B

@ 0 1L.L0 L.1 . 2. 1. 0.* 0.@ 0.*0 0.21 0.0@

10 00 2*.00 @.@ .L 2.@B 1.BB 0.BB 0.L* 0.* 0.2 0.11 0.11 0.0 0.0 0.02

12 B20 *2.0 1.11 @.2 .1 2.L 1.0B 1.1 0.0 0.* 0.1 0.1 0.0 0.0 0.02

1 @00 @.B0 21.2 1.B0 .* *.B 1.2 1.B 0.B 0.2 0.2* 0.22 0.10 0.0L 0.0*

20 1200 L.10 *B.2B 2.10 10.LB .* 2.B 2.@ 1.2B 0.LB 0.*L 0.* 0.1 0.1* 0.0

2 100 *L.0 1.B1 @. .1L .L 1.@ 1.*0 0. 0. 0.2* 0.1@ 0.0L

*0 1L00 .0 2*. 1*.0 .L@ .2 2.B1 1.L2 0.B@ 0.B 0.*2 0.2 0.11

* 2100 B*.0 *1.BB 1L.20 B.LL L.*B *.2 2.2 1.0 1.00 0.* 0.* 0.1

0 200 @.00 1.1* 2*.0 10.1B 10.B@ .B *.10 1.* 1.2L 0. 0. 0.1@

2B00 *0.B0 1*.2@ 1*. .L2 *.L 1.B 1.0 0.@ 0. 0.2

0 *000 *.00 1.L 1.0 B.10 .B 2.02 1.@ 0.L 0. 0.2@ .

B0 200 L.L0 2@.BL *1.*0 1*. L.L *.L *.* 1.B 1.22 0.* .100 000 2.20 2.@* 1B.0 B.* B.11 *.0L 2.*@ 1.0* .

10 @000 *L.00 1. 1.0 .B .1 2.2* 1

200 12000 .*0 2L.B0 2.B0 11. L.@0 *.L 2

20 1000 @0.B0 *@.2 2.L0 1L.* 1.10 .10 *

*00 1L000 L.0 2.*2 1@.20 L.*1

*0 21000 B@.20 *.2@ 2.@0 11.

>rom the ta"le, give the friction loss in ft. for the followingconditions

*H3 11H3 23

100 >eet of Pipe

0 >eet of Pipe

10 >eet of Pipe

L0 >eet of Pipe

1. *0 GP6 ................................. a " c

2. 00 GP6 ................................. a " c*H3 11H3 23

*. 20 GP6 ................................. a " c

. 00 GP6 ................................. a " c1H23 13 11H23

. 20 GP6 ................................. a " c

. L0 GP6 ................................. a " c*H3 13 11H3

B. *0 GP6 ................................. a " c

L. 00 GP6 ................................. a " c

8/11/2019 bpump

23/25

Pro-lems (continued)

27 (7

TotalE5uivalent &ength of %uctionPipe from Pump #own into !ell.

*0 ft. *H3 Pipe

TotalE5uivalent &ength of %uctionPipe from Pump #own into !ell.

10 ft. Pipe

%tanding level of water

Pumping level of water

1 ft. Dertical &ift %tanding level of water

Pumping level of water

1L ft. Dertical &ift

Pump $apacit) GP;

a.!hatisfrictionloss7

".!hatistotallift7

Pump $apacit) 10 GP;

a. !hat si4e suction pipe is re5uired to 'eep totallift within 2 feet7

".!hatisfrictionloss7

c.!hatistotallift7

/7

Pump $apacit)

GP; Elevation 2* ft.

>riction&oss l"s.

perating Pressure 20-0 l"s.

a. !hat is the %ervice Pressure7

>riction

%ervice Pressure

Elevation

!ell 6ouse Pump and Tan'

8/11/2019 bpump

24/25

Pro-lems (continued)

'7 7%ervice

Pressure

%ervicePressure

>riction Elevation >riction Elevation

!ell6ouse

Pump and Tan'

Pump $apacit) GP;

!ell6ouse

Pump and Tan'

Pump $apacit) 10 GP;

Elevation 2* ft.

perating Pressure 20-0 l"s.

200 ft. of *H3 #ischarge Pipe

a. 6ow much is friction loss7

". !hat is the %ervice Pressure7

c. !hat change would )ou ma'e in this s)stem

and what would the result "e7

Elevation L0 ft.

%ervice Pressure Me5uired 20-0 l"s.

&ength of #ischarge Pipe *00 ft.

a.!hatsi4epipetouse7

".6owmuchisfrictionloss7

c. !hat will the operating pressure of the pump

"e7d. 6ow man) continuous use outlets operating at

the same time will this capacit) suppl)7

Pump $apacit) is L GP;.

%ervice Pressure Me5uired at Tan' in:asement is *0 l"s.

a. !hat is the total length of pipe to "e considered

for friction loss7 >t.". !hat is the friction loss in feet7 >t.

c. !hat is the total feet the pump will have toovercome to get water to the tan'7 >t.

PME%%+ME%!(T$6

0? E&EDAT(I

120?

20?

P+;P(IG &EDE&

P+;P %ETT(IG

2001 Goulds Pumps

PM(ITE# (I +.%.A. SP$I3I$ATIO#S A& S

8/11/2019 bpump

25/25

Pro-lems (continued)

>ormLBA-!% :P+;P