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IS 1710 : 1989(Reaffirmed 1999)
Edition 3.2(1993-08)
Indian Standard
SPECIFICATION FORPUMPS — VERTICAL TURBINE MIXED AND
AXIAL FLOW, FOR CLEAR COLD WATER
( Second Revision )(Incorporating Amendment Nos. 1 & 2)
UDC 621.675.031
© BIS 2002
B U R E A U O F I N D I A N S T A N D A R D SMANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002
Price Group 10
Pumps Sectional Committee, HMD 20
FOREWORD
This Indian Standard (Second Revision) was adopted by the Bureau of Indian Standards on25 July 1989, after the draft finalized by the Pumps Sectional Committee, had been approved bythe Heavy Mechanical Engineering Division Council.This standard was earlier published in 1972. This standard is being revised on the basis of theinformation received from pump manufacturers and actual users in view of its implementation.This edition 3.2 incorporates Amendment No. 1 (August 1991) and Amendment No. 2(August 1993). Side bar indicates modification of the text as the result of incorporation of theamendments.
IS 1710 : 1989
1
Indian Standard
SPECIFICATION FORPUMPS — VERTICAL TURBINE MIXED AND
AXIAL FLOW, FOR CLEAR COLD WATER
( Second Revision )1 SCOPEThis standard covers the requirements forvertical turbine (radial and francis) mixed andaxial flow type pumps for clear cold water.1.1 Purchasers who intend to use the pumps forpumping liquids other than clear cold watershall modify the requirements, preferably afterconsultation with pumps manufacturers, forconditions of intended use.
2 REFERENCE2.1 The Indian standards listed in Annex A arenecessary adjuncts to this standard.
3 UNITS3.1 VolumeThe standard units for volume shall be:
a) litre; andb) cubic metre.
3.2 Rate of FlowThe standard units for expressing rate of flowshall be:
a) litre per second; andb) cubic metres per hour.
3.3 HeadThe standard unit for expressing head shall bethe metre. Thus head in metres of liquidcolumn
= pressure in kgf/cm2 ×
3.4 Dynamic ViscosityThe standard unit for expressing dynamicviscosity shall be the centipoise (cP).3.5 Kinematic ViscosityThe standard unit for expressing kinematicviscosity shall be the centistoke (cSt).
4 TERMINOLOGY
4.1 Vertical Turbine Pump (Water or Oil-Lubricated)
This is a vertical axis centrifugal pumpcomprising stages which accommodate rotatingimpellers and stationary bowls possessingguide vanes. The discharge from the pump unit
is co-axial with the shaft and the pump unit issuspended by the column pipe containing asystem of vertical shafting for transmittingpower to the impellers, the prime-mover beingexternal to the flow stream. A typical verticalline shaft pump consists of three elements asfollows:
a) Bowl Assembly — This is either a single ormulti-stage centrifugal type verticalassembly with discharge co-axial with theshaft. The bowl assembly consists ofrotating impellers, which are housed instationary bowls having guide vanes.
b) Column Assembly — The columnassembly connects the bowl assembly andthe head assembly and conducts waterfrom bowl assembly to head assembly.This comprises column pipe, shaftenclosing tube and shaft assemblies in thecase of oil-lubricated pump, and columnpipe and shaft assemblies only in the caseof water-lubricated pump.The line shaft is supported throughout itslength by means of bearing and may beenclosed in shaft enclosing tube iflubricated with oil external water, or itmay be opened and lubricated with thewater being pumped.
c) Head Assembly — The head assemblyconsists of the base from which thecolumn, shaft assembly and the bowlassembly are suspended, the dischargehead elbow which directs the water intothe delivery piping system.
4.2 Surface Discharge Head AssemblyIn this the discharge elbow is incorporated inthe head assembly so that the delivery may betaken at ground level. Thrust bearing may beprovided to take care of the hydraulic thrustgenerated by the pump in this subassemblyespecially in case of solid shaft motor.
4.3 Underground Discharge Head AssemblyIn this the discharge elbow or tee is separatedfrom the head assem bly so that the delivery m aybe taken at ground level. Thrust bearing m ay beprovided to take care of the hydraulic thrustgenerated by the pum p in this sub-assem blyespecially in case of solid shaft m otor.
10
density in kg/dm3-------------------------------------------------
IS 1710 : 1989
2
4.4 Driver
The driver is the mechanism mounted on thedischarge head assembly which transmits orfurnishes the power to the head shaft. It maycontain the means for impeller adjustment andprovides a bearing to carry the thrust load. Itmay or may not be a prime mover. The types ofdrivers are defined as follows:
a) Hollow Shaft Motor — The vertical hollowshaft motor drive is an electric motorhaving a motor shaft that has been boredon the centre of its axis to receive the headshaft of the pump. Impeller adjustment ismade at the upper end of the motor, and ameans to carry the thrust on a bearingwithin the motor, is provided.
b) Pulley Head — A flat or V-belt drivenmechanism having a shaft that has beenbored on the centre of its axis to receivethe head shaft of the pump. In case ofhollow shaft construction impelleradjustment is made at the top of thepulley head. Pulley head is provided witha bearing to carry the total thrust as wellas a bearing to carry the belt pull.
c) Gear Head — A right angle gear drive is agear mechanism having a shaft that hasbeen bored on the centre of its axis toreceive the head shaft of the pump. Thehorizontal shaft of a gear drive receive itspower from the prime mover and througha pair of bevel gears, transmits it to thehead shaft. Impeller adjustment ispossible at the top of gear head andbearing is provided on the hollow shaft fortaking up and down thrust.
d) Solid Shaft Drive — It is an electric motorhaving conventional solid shaft coupled tothe head shaft of the pump. It shallprovide a means for impeller adjustment.In this case, a thrust bearing shall beprovided either in the discharge head or inthe motor.
e) Combination Drive — This includesmeans for operating the pumps with twoor more drivers.
4.5 Datum
The datum shall be taken as the elevation ofthat surface from which the weight of the pumpis supported. This is normally the elevation ofthe underside of the base plate.4.6 Column Setting
Column setting is the nominal vertical distancein metres from the underside of the dischargehead/base plate to the column pipe connectionwith the bowl assembly.
4.7 Static Water Level
The static water level is the vertical distance inmetre from the datum to the level ofatmospheric surface while no water is beingdrawn from the pool.4.8 Pumping Water Level
Pumping water level is the vertical distance inmetres from the datum to the level of theatmospheric surface while the specified liquidis being drawn from the pool.4.9 Draw-Down
It is the difference in metres between thepumping water level and the static water level.4.10 Capacity of the Pump ( Q )
It is the volume rate of flow ( Q ) expressed inlitre per second (metre cube per hour) deliveredby the pump at the specified speed and head.4.11 Pump Speed ( N )
It is the rate of rotation of the pump shaftexpressed in revolution per minute.4.12 Head
4.12.1 Head Below Datum ( hb )The vertical distance in metres between thedatum to the pumping water level.4.12.2 Head Above Datum ( ha )The head in metres measured above the datumplus the velocity head in metres at the point ofmeasurement.4.12.3 Velocity Head ( hv )The kinetic energy per unit weight of the liquidat a given section expressed in metres of liquid.It is generally defined by the expression.
hv =
where v is the average velocity at the crosssection of the measurement in m/s and g is 9.81m/s2.4.12.4 Effective Head ( h )It is the bowl assembly head minus the columnloss, discharge head loss and suction loss. Thisis the head generally called for in any pumpspecifications. In open section installations it isthe algebraic sum of the head below datum andthe head above datum. In closed suctioninstallations, it is the head above datum plusthe vertical distance in metres from datum tothe pump suction connection minus the suctionhead.The datum reference for calculating theeffective head shall be the centre line ofdischarge head elbow/discharge tee outlet.
v2
2 g--------
IS 1710 : 1989
3
4.12.5 Bowl Assembly Heads ( h )It is the energy imparted to the liquid by thepump bowl assembly, expressed in metres ofliquid. It is the head developed at the dischargeconnection of the bowl assembly and is anintegral multiple of the head per stagedepending on the number of stages in the bowlassembly. The head developed by the bowlassembly is equal to effective head plus frictionloss in the column assembly, discharge headloss and suction loss that is,
H = h + hs + hc + hd4.12.6 Shut Off HeadIt is the head developed at the dischargeconnection of the bowl assembly and is integralmultiple of the head per stage, depending onnumber of stages in the bowl assembly, whenthe delivery valve is in fully closed condition.4.12.7 Maximum Discharge PressureIt is the maximum pressure developed by thepump at discharge head outlet. This pressure isgenerally called for in pump specification todesign the pipe lines, valves and fittings etc.4.13 Net Positive Suction Head (NPSH)Net positive suction head ( hsv ) available is thetotal suction head of liquid in metres absolute,determine at impeller eye, less the vapourpressure of the liquid in metres absolute. Thus
hsv = hsa – hvps orhsv = ha – hvps + hs
It is necessary to differentiate betweenavailable and required NPSH. The availableNPSH is a characteristic of the system in whichthe pump works and is the difference betweenexisting absolute suction head and vapourpressure at prevailing temperature. Therequired NPSH is a function of pump designand represents the minimum required marginbetween the suction head and the vapourpressure at a given capacity.4.14 Specific Speed4.14.1 Specific speed is a term used for classifyingpum ps on the basis of their perform ance anddim ensional proportion regardless of their actualsize or the speed at w hich they operate. It is thespeed expressed in revolutions per m inute of anim aginary pum p geom etrically sim ilar in everyrespect to the pum p under consideration andcapable of raising 75 kg of w ater per second to aheight of one m etre.4.14.2 M athem atically specific speed is given by:
If the discharge is expressed in litres perminute, the expression for specific speed iswritten as:
ηsq =
4.15 Loss4.15.1 Suction Loss ( hs )The loss of head in strainer and suction pipeattached below bowl assembly. When a straineris not fitted, then suction bell entry losses shallbe included.4.15.2 Column Loss ( hc )It is the value of the head loss expressed inmetres caused by the flow friction in thecolumn pipe assembly.4.15.3 Discharge Head ( hd )It is a frictional loss head in metres indischarge head assembly.4.15.4 Line Shaft Loss ( Ps )It is the power expressed in kW required due tothe rotation friction of the line shaft in itsbearing at the specified speed. This value isadded to the bowl assembly input to predict thepump input.4.15.5 Thrust Bearing Loss ( Pt )The power in kilowatt absorbed by the thrustbearing due to hydraulic axial thrust includingweight of rotating assembly.4.16 Input Power4.16.1 Bowl Assembly Input Power ( Pb )The power in kilowatt delivered to the impellershaft.4.16.2 Pump Input Power ( P ).It is the power expressed in kW delivered to thehead shaft (top shaft) by the driver. It is equalto the bowl assembly input plus line shaft lossand thrust bearing loss.
P = Pb + Ps + Pt= Pi × ηm
whereηm = efficiency of motor.
4.16.3 Driver Input Power ( Pi )It is the power in kilowatt applied to the driver.4.17 Output Power4.17.1 Bowl Assembly Output ( Pb )The power in kilowatts delivered by the bowlassembly. It is expressed as:
wherehsa = total suction head in metres absolute
= ha ± hs (plus sign applies to suctionhead and minus sign applies to suctionlift), and
ha = local atmospheric pressure in metresabsolute.
ηsq = 3.65 n Q
H0.75----------------------------
whereηsq = the specific speed in revolutions per m inute,n = the speed in revolutions per minute,Q = the discharge in cubic metres per
second of a single suction impeller, andH = the total head per stage in metres.
0.0149 n Q
H0.75-----------------------------------
QH102----------
IS 1710 : 1989
4
where Q is the discharge in litre per secondand H is the bowl assembly head in metres.
4.17.2 Pump Output ( p )The power in kilowatt delivered by the pumpand is equal to
where Q is the discharge in litres per secondand h is the effective head in metres.
4.18 Efficiency
4.18.1 Bowl Efficiency (ηb)The ratio of the bowl assembly output to thebowl assembly input expressed as a percentage:
ηb =
4.18.2 Pump Efficiency ( np )The ratio of pump output to pump inputexpressed as a percentage:
ηp = × 100
4.18.3 Driver EfficiencyIt is the ratio of the driver power output to thedriver power input expressed in percentage.
4.18.4 Overall Efficiency (ηo)The ratio of pump output to driver inputexpressed as a percentage:
ηo = × 100
In comparing the overall efficiency of twopumps offered for identical duty conditions itshall be noted that the size of column pipe,shaft enclosing tube, line shaft and the distancebetween line shaft bearings shall be the same.If these differ, an allowance in the effectivehead equal to the difference in the column pipefriction head and in pump input for line shaftbearing friction shall be given.
5 CHARACTERISTICS OF CLEAR, COLD WATER
5.1 Clear, cold water shall mean water havingthe characteristics specified below:
NOTES1 If the range of pH value of the water pumped isbetween 6.5 and 7.5 and also the chloride content is lessthan 100 ppm, the pump may be made of any bronze.However, if the range of pH is between 6.5 and 8.5 andthe chloride content exceeds 100 ppm, only zinc-freebronze fitted construction or stainless steel constructionshall be permitted.2 If any other characteristics of the water differ fromthose specified in 4.1, the pump details shall have to beagreed between the manufacturer or the supplier andthe user, and shall be specified in the order.
6 NOMENCLATURE AND MATERIAL OF CONSTRUCTION
The name of the parts of construction normallyused in vertical turbine pump is given in Fig. 1(A & B), 2 and 3, read with Annexes B and C.
7 MATERIAL OF CONSTRUCTION
7.1 It is recognized that a number of materialsof construction is available to meet the needsfor pumps handling clear, cold water. Thetypical materials of construction of variousparts that are given in Annexes B and C aremerely for the guidance of the manufacturersand the users.7.2 Gaskets, Seals and Packings
Gaskets, seals and packings used for clear, coldwater pumps shall conform with those specifiedin IS 5120 : 1977.7.3 If there are no shaft sleeves on the impellershaft at the bearing portion, the impeller shaftshall be of stainless steel.
8 DIRECTION OF ROTATION
8.1 The direction of rotation of pumps isdesignated clockwise or anticlockwise asobserved when looking at the pump shaft fromthe driving end.8.2 The direction of rotation shall be clearlyindicated on the unit either by incorporating anarrow on the discharge head assembly or on thename plate which is on ground level.
9 GENERAL SPECIFICATIONS
9.1 General
9.1.1 The supplier shall submit with hisquotation in the standard form ( see 13 ) andperformance data required by the purchaser.9.1.2 The manufacturer shall indicate in thespecification of the pump the minimum size ofthe well in which the pump shall enter.9.1.3 The pump shall be installed in the well inaccordance with the manufacturer’srecommendation.9.1.4 The manufacturer shall indicate thesubmergence required for the satisfactoryperformance of the pump ( see Fig.4 ).
a) Turbidity 50 ppm (silica scale), Max
b) Chlorides 500 ppm, Max
c) Total solids 3 000 ppm, Max
d) pH 6.5 to 8.5
e) Temperature 33°C Max
f) Specific gravity 1.004 Max
Qh102----------
PbPb------ 100× Q H×
102 Pb×----------------------- 100×=
pP----
ppi-----
IS 1710 : 1989
5
9.1.5 Driver9.1.5.1 Unless otherwise agreed, the motorshall be of the drip-proof type and shall complywith IS 325 : 1978 where applicable. The motorshall be of continuous rating and of suitablesize to drive the pump continuously over thespecified characteristics range without gettingoverloaded. Rotation of vertical shaft shall becounter clockwise when viewed from drivingend, unless otherwise specified by thepurchaser.9.1.5.2 For engine drive, the power shall beapplied to the pump shaft through a propellershaft with universal joints (spicer shaft) orpulley with flat or V-belt.9.1.5.3 The pump shall be driven in such a waythat it operates within ± 5 percent of thespecified speed.9.1.5.4 A thrust bearing of adequate capacity tocarry the weight of all rotating parts, plus thehydraulic down-thrust, shall be provided in thedriver or the discharge head as an integralpart.9.1.6 Suction Pipe and Suction StrainerNormally an open ended suction pipe shallsuffice with properly developed tubewells. Ifthe suction strainer is called for by thecustomer, it may be provided separately orintegral with the suction pipe and shall have anet area of openings equal to at least threetimes the suction pipe cross sectional area.9.1.7 Suction pipe with foot-valve and strainermay be supplied. The strainer may be providedseparately or integral with the foot-valve. Thenet strainer area shall be equal to at least threetimes the suction pipe cross sectional area.9.2 Oil-Lubricated Pump and Column9.2.1 Impeller ShaftWhere there are no shaft sleeves on theimpeller shaft, shaft shall be of stainless steelconforming to Schedule V of IS 1570 : 1961(Grades C7Cr 13, 15Cr 13 or 22Cr 13) andIS 2073 : 1970. If renewable sleeve of bronze orstainless steel is provided on the impeller shaftat bearing portions, the shaft may be made ofsteel conforming to Grade C40, C45 or C55 ofIS 1570 : 1961. As recommended by themanufacturer, shaft shall be guided by bearingprovided in each bowl or above and below theimpeller shaft assembly. The butting faces ofthe shaft shall be machined square to the axisand the shaft ends shall be chamfered on theedges. Shaft shall have a surface finish of 0.75micron Ra. Max ( see IS 3073 : 1967 ).The size of the shaft shall be determined on thebasis of the following formula of maximumcombined shear stress given below:
S =
where S is the combined shear stress in kg/cm2,D is the shear diameter in mm at the root of thethreads or the minimum diameter of any undercut, F is the axial thrust in kg of the shaft,including hydraulic thrust plus the weight ofthe shaft and all rotating parts supported by it.p is the power transmitted by the shaft in kWand n is the rotational speed in rev/min.The maximum combined shear stress S shallnot exceed 30 percent of the elastic limit intension or shall be more than 18 percent of theultimate tensile strength of the shaft steelused. However, for large size pump the shaftshall be checked for fatigue loading also, thismay be recommended by the manufacturer.The straightness and machining tolerancesshall be the same as those given under lineshaft (9.2.5).
9.2.2 ImpellerThe impeller may be of the enclosed orsemi-open type. Impeller shall be fastenedsecurely to the impeller shaft with keys, taperbushings, lock nuts or split thrust rings. Theyshall be adjustable vertically by means of a nutin the driver or an adjustable coupling betweenthe pump and the driver. Impeller shall beproperly balanced. Dynamic balancing isrecommended. Closed impellers may have arenewable sealing/wearing ring fitted on to thefront shroud or in the bowl or both.
9.2.3 Bowls9.2.3.1 The castings of bowl shall be free ofblow holes, sand holes and other detrimentaldefects, the bowls shall be capable ofwithstanding a hydrostatic pressure equal oneand a half times maximum discharge pressure(this includes shut off head). The time durationfor the test pressure shall be 15 minutes afterthe final pressure is achieved.9.2.3.2 The bowls may be equipped withreplaceable seal rings on suction side ofenclosed impellers. Water passages shall besmooth and the bowls may contain bushes toserve as bearings for the impeller shaft.9.2.3.3 Discharge caseThe discharge case shall be provided withmeans of preventing the leakage of water intothe shaft enclosing tube and shall have typesports to permit the escape of water that leaksthrough the seal or bushing.9.2.4 MarkingThe bowl assembly shall bear a name-plategiving the following data:
a) Name of manufacturer,b) Serial number/year of manufacture,c) Type,d) Type of impeller,e) Head in metres/kW rating, andf) Speed.
63.7F
D2----------------
2 492p 106×
nD3-----------------------------
2
+
IS 1710 : 1989
6
9.2.5 Line Shafts9.2.5.1 The design of the shaft shall also takeinto consideration the critical speed of the shaftin such a way that the critical speed shall haveadequate margins with respect to the operatingspeed by at least 30 percent on either side.9.2.5.2 The shaft shall be furnished withinterchangeable sections having a length of 1.5,2.5 or 3 m. The butting faces of shaft shall bemachined square to the shaft axis and the shaftends shall be chamferred on the edges. Toensure correct alignment of the shafts, theyshall be straight within 0.125 mm for 3 mlength total dial indicator reading. Themaximum permissible error in the axialalignment of the thread axis with the axis ofthe shaft shall be 0.05 mm in 150 mm. In thecase of shafts with rigid couplings, themaximum permissible error in the axialalignment of the axis with the axis of the shaftshall be 0.05 mm in 150 mm.9.2.5.3 The shaft shall have a maximumsurface roughness 0.75 microns Ra ( seeIS 3073 : 1967 ).9.2.6 Steel coupling shall be designed with aminimum factor of safety of one-and-a-halftimes the factor of safety for shafts and shallhave left-hand or right-hand threads dependingon the direction of rotation of the pump totighten during the pump operation. The outsidediameter of the couplings shall be concentricwith the bore and with a small transverse holein the middle.9.2.7 Line Shaft BearingsThe line shaft bearing shall be of bronze or anyother suitable material and shall be spaced atintervals of 1.5, 2.5 or 3 m for 2 600 to 3 500,2 000 to 2 600 and up to 2 000 rev/min,respectively. The bearings shall be recessed outor heavily chamfered at one end (the top end inthe installed condition) to serve as a reservoirof oil for the bearings, and shall also contain oilgrooves or separate by-pass hole to allow oilflow to the bearing below.9.2.8 Shaft Enclosing Tube9.2.8.1 The shaft enclosing tube shall of one of thebores 32, 40, 50, 65 and 80 m m and shall conform tothe requirem ents of either IS 1239 (Part 1) : 1979‘H eavy series ’ or IS 1978 : 1971.
NOTE — Larger sizes may be used by mutualagreement between the purchaser and the supplier.
9.2.8.2 The standard length of shaft enclosingtube shall be 1.5, 2.5 or 3 m.9.2.9 Column Pipe9.2.9.1 The column pipe shall be manufacturedfrom tubes conforming to either IS 1978 : 1982or Gr A of IS 2062 : 1984. For depths greaterthan 80 m, the column pipe shall bemanufactured from tubes conforming toIS 4270 : 1983.
9.2.9.2 The standard lengths of column pipesshall be 1.5, 2.5 or 3 m.
9.2.9.3 The column pipe may be threaded,flanged or provided with other methods ofconnection.
9.2.10 Discharge Head
9.2.10.1 At the surface or undergrounddischarge head, an automatic lubricator shallbe installed for electric motor driven pumpsand manual or other types of lubricator forengine driven pumps. The lubricator assembly,automotive or general type, shall be located atoperating floor.
9.2.10.2 A tube tension plate may be installedon the discharge head to tighten up the shafttubes for the purpose of aligning the shafts. Agland shall be provided to seal off any leakagefrom the discharge head.
9.2.10.3 The discharge head shall, in additionto other requirements ( see 9.3.3 ), be able tosupport the weight of the pump.
9.2.10.4 The discharge head shall bear aname-plate with the following information:
Name of manufacturer ........................................
Serial Number .....................................................
Type .....................................................................
Size ......................................................................
Speed ......................................rev/min.
Discharge .............................. 1/min, 1/s or m3/h
Head ......................................., metres
Pump input .......................... kW
Maximum input ....................kW
Guarantee Class C as per IS 9137 : 1978
or
Guarantee Class B as per IS 10981 : 1983
9.3 Water Lubricated Pump
The same specification shall apply as foroil-lubricated pump except in cases givenin 9.3.1 to 9.3.3.
9.3.1 Line Shafts
The shaft sections shall be provided with anon-corrosive wearing surface, except in thecase of stainless steel shafts, particularly at thelocation of each guide bearing.
9.3.2 Line Shaft Bearings
These shall be designed to be lubricated byexternal water or the water being pumped andshall be placed in bearing holders held inposition at the joint of the columns.
IS 1710 : 1989
7
FIG. 1A SELF WATER LUBRICATED PUMPOPEN LINE SHAFT
FIG. 1B SELF WATER LUBRICATED PUMP WITH SOLID SHAFT MOTOR
IS 1710 : 1989
8
FIG. 2 OIL-LUBRICATED PUMP ENCLOSED LINE SHAFT
FIG. 3 BOWL ASSEMBLY WITH SEMI-ENCLOSED TYPE IMPELLER
FIG. 4 DATUM ELEVATION AND SUBMERGENCE IN VERTICAL TURBINE PUMP
IS 1710 : 1989
9
9.3.2.1 Gland protectionWater slinger of adequate diameter shall beprovided to prevent water from creeping to themotor.9.3.3 Discharge Head9.3.3.1 The discharge head shall have an arrowindicating the direction of rotation of pump.9.3.3.2 The discharge head may have a stuffingbox with a renewable bushing. The head mayinclude pre-lubrication connection to wet theline shaft bearings before starting the pumps, ifit is not provided with a foot-valve and strainer.9.3.3.3 Where manual control is used and asource of fresh water under pressure is notavailable, a pre-lubricating tank, withnecessary valves and fittings to connect it tothe pump, shall be provided. The size of thetank shall be adequate to permit throughwetting of all the line shaft bearings beforepower is applied, with an adequate reserve forrepeating the process in the event of the pump’sfailure to start in the first attempt.
10 ESSENTIAL DESIGN FEATURES
10.1 The pumps shall satisfy the followingbasic design features:
a) It shall have a rising head characteristics;b) The impeller adjustment shall be such
that the impellers run free in anyinstalled condition in spite of theextension of line shaft caused by hydraulicdown-thrust, the weight of shafting andimpellers; and
c) It shall be designed for non-overloading ofthe prime mover.
11 ENGINEERING DATA
11.1 Column Friction Loss
The column friction chart (Fig. 5) shall be usedas a design guide to determine the loss in headdue to column friction. Head losses areconsidered where the flow is between the insidediameter of the column pipe and the outsidediameter of the shaft enclosing tube.For open line shaft construction, the lossesshown in Fig. 5 shall be used by assuming thelosses equal to those indicated on the chart forshaft enclosing tube of a size that shallnormally close the open line shaft in question.11.2 Discharge Head Loss
The discharge at loss head chart (Fig. 6) shallbe used for guidance to determine the hydraulicloss in the discharge head. Losses in thedischarge heads vary with the size of the head,the design of the head and the size of the tubingor shaft column and discharge pipe used.
11.3 Mechanical Friction
The mechanical friction chart (Fig. 7) shall beused to determine the added horse power due tomechanical friction in rotating the line shaft.11.4 Thrust Bearing Loss
Thrust bearing loss shall be declared by themanufacturer.11.5 Sump Dimension and Submergence
A chart showing various sump dimensions andminimum submergence for vertical turbinepump operating as single pump/multiple pumpinstallation in a sump is illustrated in Fig. 8(read with Fig. 4). These are recommendedvalues, may be modified or changed, based onsump model test.
12 INFORMATION TO BE FURNISHED BY THE PURCHASER
12.1 When enquiring or ordering pumps to thisstandard, the user shall furnish the followinginformation to the supplier:
a) Name of the purchaser,
b) Address,
c) Installation site,
d) Number of pumps required,
e) Spare parts required,
f) Type of drive : electric motor / engine,
g) Pump operating conditions:
1) Capacity l/s or m3/h; ir;
2) Pump speed rev/min;
3) Head below ground level at ratedcapacity .........m;
4) Head above ground level at ratedcapacity .........m;
5) Operating range — minimum head andmaximum head ...................m;
6) Special materials required to resistcorrosion and/or erosion; and
7) Details of delivery connections —sketch of pipe line layout givinginformation such as delivery pipediameter and length, method ofconnection, distance between point ofdischarge and ground level, etc, may begiven.
h) Description of well (Fig. 9):
1) Is the pump to be installed in
— open well
— tube well
— sump or in other size;
IS 1710 : 1989
10
13 INFORMATION TO BE FURNISHED BY THE SUPPLIER
13.1 When supplying pumps according to thisstandard the supplier shall furnish thefollowing information to the purchaser:
2) Minimum insided diameter of well orpipe ( A ) mm to a depth of ... m;
3) Total depth of open well ...... m;4) Total depth of top housing pipe for
tube well ( B ) ...... m;5) Well slantness ... mm out at .... m;6) Static water level below ground
surface ( C ) ... m;7) Pumping draw down ( D ) .... m at 1/s
or m3/h;8) Well developed to .... l/s at .... m of
draw down;9) In case of sump, details of sump and
intake shall be furnished indicatingthe pump position in it; and
10) Maximum and minimum operatingliquid levels in the sump ..... m.
NOTE — Sump layout and intake arrangementdrawing shall be furnished by the purchaser.
j) Site conditions:1) Height above mean sea level in
metres;2) Maximum and minimum temperature
during the year (°C);3) Humidity (percent);4) Nature of atmosphere; and5) Details of quality of water ( see 5.1 ).
k) Prime-mover details:1) Direct electric motor drive, or2) Pulley head drive, or3) Gear head drive, or4) Any other method.State which is required.A) In case of electric motor drive, give:
i) Type of current (ac/dc,single-phase/three-phase);
ii) Frequency (Hz);iii) Voltage; andiv) Preferred speed in rev/min.
B) In case of pulley head and gear headdrives through engine or electricmotor, give the following details:i) Speed in rev/min;
ii) Diameter of shaft (mm);iii) Length of shaft extension (mm);iv) Size of keyway (mm);v) Power (kW);
vi) Diameter of engine/motor pulley(mm);
vii) Electric motor data as in (K) (A);and
viii)Direction of rotation of engine asobserved from the during end.
A dimensioned sketch may be furnished, ifrequired.
m) Accessories:1) Size of companion delivery flange, if
required ............. mm;2) Whether suction strainer required or
not; and3) Type of starter and protection
required.n) Any other information or requirement.
a) Code designation of pump;b) Type of pump giving:
1) Method of lubrication: oil/waterlubricated;
2) Suitability in tubewell of size .... mmdiameter.
3) Number of stages;4) Maximum outside diameter of bowl
.... mm;5) Design discharge l/s or m3/h;6) Effective head ... m;7) Pump speed ... rpm;8) Bowl assembly head .... m;9) Bowl assembly input at duty point ....
kW/pump input at duty Point;10) Maximum bowl input ...... kW;11) Bowl assembly efficiency at duty
point .......... %; and12) Maximum pump input .... kW;
c) Details of column assembly:1) Length of column pipe .. m;2) Method of connection of column pipe
threaded/flanged;3) Size of shaft enclosing tube ... mm;4) Size of line shaft ... mm;5) Size of discharge outlet .... mm;6) type of discharge head, surface, below
base, if below base distance fromdatum reference to centreline ofdischarge tee ...... mm;
d) Details of drive:1) In case of direct drive through electric
motor, give;i) Rating ................................. kW;
ii) Type : squirrel cage/slipring/dripproof/vertical/hollow-spindle/solidshaft;
iii) Details of power supply; andiv) Revolutions per minute.
2) In case of gear head drive, give:i) Model;
ii) Speed rating;iii) Operating speed;iv) Details of pulley or coupling;v) Direction of rotation; and
vi) Rating of driver ..... kW.
IS 1710
:1989
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FIG. 5 FRICTION LOSS CHART FOR STANDARD COLUMN PIPE ASSEMBLY (NPW PIPE C = 140)(COLUMN PIPE DIAMETER × SHAFT ENCLOSING TUBE DIAMETER)
IS 1710
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FIG. 6 DISCHARGE HEAD LOSS CHARTFIG. 7 LOSS OF kW IN LINE SHAFT
BEARING FRICTION
IS 1710 : 1989
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FIG. 8 SUMP FOR PUMPS
IS 1710 : 1989
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FIG. 9 SKETCH OF INFORMATION TO BE SUPPLIED BY PURCHASER
IS 1710 : 1989
15
14 PUMP TEST
14.1 Performance Test
14.1.1 The expected field performance of thepump may be obtained by testing the bowlassembly in the laboratory and then calculatingthe required performance ( see Fig. 10 ). Atypical laboratory test set up as shown inFig. 11.14.2 Laboratory Tests
As far as possible, full load and full speed testsshall be conducted. However, laboratory test atreduced speed and reduced stages shall beaccording to IS 5120 : 1977.14.2.1 SamplingThe sampling plan as given in IS 10572 : 1983shall be followed.14.3 Field Tests
A field test gives an indication of the overallperformance of a pump when it is operatingunder actual field conditions. Field tests aresometimes used as acceptance test. Theaccuracy with which field test be made dependson the instruments used in the test, the properinstallation of the instruments and the skill ofthe test personnel.It shall be recognized that environmentalconditions in a well or the design of a pumpshall significantly affect field performance andalso affect the apparent results of field test.Under most conditions, it is recommended thatacceptance of the pump shall be based on testsmade in laboratory.Field test shall not be carried out until thepump has worked for at least 24 hours to allowrunning in time for the bearings.If test is to be carried out at different heads,this shall be done by throttling the deliveryvalves, in this case delivery valve be placedafter the minimum upstream and down streamlength as required by flow measuring device.The control valve shall be at least 4 times thediameter away from the discharge head elbow.A typical diagrammatic arrangement for fieldtest is illustrated in Fig. 12. For details, referIS 9137 : 1978.14.3.1 SpeedThe rotating speed of pump shall be measuredby revolution counter or by an accuratelycalibrated tachometer or by stroboscopecounting slip method.14.3.2 DischargeThe discharge of the pump shall be measuredby means of a standard venturi tube, nozzle,orifice plate, V-notch/rectangular weir, pitottube, traverse or any other recognized method.The method adopted for dischargemeasurement shall be suitable for the size of
3) In case of pulley head drive, give:i) Model;
ii) Type of belting to be used:V/FlatWidth of flat belts ... mmNo. of V-belts ....Section of V-belts
iii) Vertical pulley diameter range........ mm;
iv) Driver pulley diameter range .......mm; and
v) Power rating of the driver .......kW.
e) Accessories:1) Suction pipe:
i) Diameter and length of suctionpipe;
ii) Method of connection : screwed/bolted; and
iii) Strainer : size and type2) Depth gauge, direct or indirect
reading type with size and length ofair line pipe;
3) Lubricator: automatic/manual/othertype;
4) Pre-lubricating tank/foot-valve withstrainer in case of water-lubricatedpump, wherever possible;
5) A pair of column pipe clamps;6) A pair of shaft clamps;7) Sight gauge in case of oil-lubricated
pump, wherever possible;8) Pressure gauge;9) Gauge cock;
10) Reflux valve;11) Sluice valve;12) Float switches; and13) Spanners.
f) Additional information to be furnishedwith the supply:1) Performance curve of head v
discharge;2) Performance curve of the pump
showing total bowl assembly inputpower and bowl assembly efficiencyover the specified head range;
3) Certified drawings giving leadingdimensions;
4) Instructions for installation andmaintenance; and
5) Weight of the pump, the right anglegear head, pulley head and theelectric motor, if required.
IS 1710 : 1989
16
pump, its duty, and situation. The pumpmanufacturer shall, if required give evidence ofthe proper calibration of the apparatus used.The surface conditions, size and length of thepipe preceding and succeeding the fluidmeasuring device are as important as thecalibration of the device itself and shall betaken care.14.3.3 Net Pump Effective HeadFor determining the net pump effective head,following measurement shall be taken and thereadings shall be converted to datum reference:
a) Static water depth with pump in workingcondition;
b) Delivery head; andc) Velocity head.
14.3.3.1 Delivery headThis shall be measured by means of acalibrated bourdan tube gauge (readingconverted to meter of liquid) located at adistance of 2D from the discharge elbow of thetest pump ( D is dia of delivery pipe ) plus thedistance from the datum to the centreline ofgauge. It is recommended that mercurymanometers be used in preference to bourdantype gauges when the head to be measured is7.5 m or less. For precautions and connectionsfor the gauge refer 13.8.4 of IS 5120 : 1977.
14.3.3.2 Velocity headVelocity head shall be obtained from the actualmeasurement of the inside diameter of thedischarge pipe at the point where the pressuretap is located ( see 4.12.3 ).14.3.4 Pump OutputThis shall be calculated as in 4.17.2.14.3.5 Pump InputThe power input to the pump shall bedetermined with a vertical dynamometer or acalibrated electric motor. It is generallyconsidered impractical to attempt to measurepump power input by means of transmissiondynamometer in field.14.3.6 Overall EfficiencyWhen the specifications calls for an overallefficiency guarantee, the actual job motor shallbe used without calibration and efficiencycalculated directly ( see 4.18.3 ).
15 RECORDING AND COMPUTATION OF TEST RESULTS
15.1 All instruments test readings as well ascorrected readings shall be recorded on the testsheet. Complete data concerning the pumpdriver and instrument identification shall alsobe recorded.
FIG. 10 CURVE QH AND Qη FOR VERIFICATION OF THE GUARANTEE
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:1989
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FIG. 11 LABORATORY TEST ARRANGEMENT
IS 1710
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FIG. 12 FIELD TESTING ARRANGEMENT FOR VERTICAL TURBINE PUMP
IS 1710 : 1989
19
15.2 All the test results shall be converted intoperformance at the specified speed from theactual readings, by the following similarityrelations:
in which Q is capacity, H is head, P is power, nis specified operating speed, and t indicates testvalues.
15.3 Bowl Assembly Input Power ( P ),see 4.16.1.
15.4 Bowl Assembly Head, see 4.12.5.
15.5 Bowl Efficiency, see 4.18.1.
15.6 Effective Head ( h )
h = H – hc – hd – hs
in which H is the bowl assembly head, hc is thecolumn loss based on complete pump setting, hddischarge head loss in metre, and hs is suctionhead.
15.7 Pump Efficiency, see 4.18.2.
15.8 Overall Efficiency
Pump efficiency multiplied by the motorefficiency shall give the overall efficiency of theunit, if there is no intermediate driver.
15.8.1 The bowl assembly head, bowl efficiencyand bowl assembly input power shall be plottedas ordinates on graph against the capacity asabscissa to show the anticipated field
performance of the complete pump.
16 GUARANTEES
For guarantee of the pumps with Class Cratings, 4.1 and 9.4 of IS 9137 : 1978, and withclass B ratings, 4 and 9.4 of IS 10981 : 1983shall be referred. Unless otherwise specified,the guarantee shall be as per IS 9137 : 1978 asstated above.16.1 Guarantee of Workmanship and Material
The pumps shall be guaranteed by themanufacturer against defects in material andworkmanship, under normal use and service,for a period of at least 15 months from the dateof despatch or 12 months from the date ofcommissioning whichever is less.16.2 Guarantee of Performance
The pump shall be tested for the operatinghead range. However, the range shall bebetween +10 percent and –25 percent of therated head. Below 30 m, the limit shall be from–25 percent to +2.5 or ± 3 m whichever is less.The tolerance on discharge shall be ± 2.5percent and for the other duty points, toleranceshall be according to Annex A of IS 9137 : 1978.16.2.1 The efficiency of vertical turbine pumpshall be guaranteed at the specified point ofrating only and shall not be guaranteed to coverthe performance of the pump under conditionsvarying therefrom nor for a sustainedperformance of any period of time. However,pump discharge may be guaranteed for therange of head between –25 percent and +10percent of the specified head when the latter is30 metres or above. Below 30 metres the limitsshall be from –25 percent to +25 presents of ± 3metres whichever is less.
Q = Qt H = Ht
P = Pt
nn1------ n
n1------
2
nnt-----
3
IS 1710 : 1989
20
ANNEX A( Clause 2 )
LIST OF REFERRED INDIAN STANDARDS
IS No. Title
210 : 1978 Grey iron castings ( thirdrevision )
226 : 1975 Structural steel (standardequality) ( fifth revision )
318 : 1981 Leaded tin bronze ingotsand castings ( secondrevision )
325 : 1971 Three-phase inductionmotors ( fourth revision )
1030 : 1982 Carbon steel casting forgeneral engineeringpurposes ( fourth revision )
1239 (Part 1) : 1979 Mild steel tubes ( fourthrevision )
1570 (Part 5) : 1985 Schedules for wroughtsteels : Part 5 Stainlessand heat resisting steels( second revision )
1978 : 1982 Line pipe ( secondrevision )
2062 : 1984 Weldable structural steel( third revision )
IS No. Title
3073 : 1967 Assessment of surfaceroughness
3444 : 1987 Corrosion resistant high alloysteel and nickel based castingsfor general applications ( secondrevision )
4270 : 1983 Steel tubes used for water wells( first revision )
5120 : 1977 Technical requirements forroto-dynamic special purposepumps ( first revision )
7283 : 1974 Hot-rolled bars for production ofbright bars
9137 : 1978 Code for acceptance test forcentrifugal, mixed flow andaxial pumps — Class C
10572 : 1983 Methods of sampling for pumps
10981 : 1983 Code of acceptance test forcentrifugal, mixed flow andaxial pumps — Class B
IS 1710
:1989
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ANNEX B( Clause 7.1 )
NOMENCLATURE OF PARTS COMMONLY USED IN VERTICAL TURBINE PUMPS DRIVEN BY SHAFT MOTOR
Part No.
Name of the Part TypicalMaterial
MaterialSpecification
Brief Description and Function of Parts
(1) (2) (3) (4) (5)
1. Air line* A thin tube installed alongside the pump and submerged inliquid for the purpose of finding the liquid level.
2. Automatic lubricator It is a solenoid operated lubricator providing oil to the line shaftbearing automatically when motor is started.
3. Bearing holder Cast iron/bronze IS 210 : 1978,IS 318 : 1981
Used to support open line shaft bearing, generally located at theend of each section of column pipe.
4. Bearing retainer Cast iron IS 210 : 1978 Retains open line shaft bearing in the bearing holder.
5. Bottom column pipe Steel IS 1239 (Part 1) : 1979 or IS 1978 : 1982
First section of column immediately above discharge case.
6. Bowl Cast iron IS 210 : 1978 It guides flow received from one impeller to the next impellerabove. It houses impeller and bowl bearing.
7. Bowl bearing Bronze/rubber IS 318 : 1981 Bearing for the impeller shaft in each bowl.
8. Column flange Cast iron/steel IS 210 : 1978,Grade A of IS 2062 : 1984
These are mounted on two ends of each section column pipe ifflange column pipe is used. May take the firm lugs.
9. Column pipe Steel Grade A of IS 2062 : 1984 The raising main through which liquid goes up.
10. Column pipe adopter Cast iron/steel IS 210 : 1978,IS 2062 : 1984
Transition piece between the bowl assembly and the column pipeused, if required.
11. Column pipe coupling Steel/cast iron IS 210 : 1978, For connecting column pipe section having threaded ends.
IS 2062 : 1984
12. Column pipe spacer Cast iron IS 210 : 1978 Aligning ring between two column ends. Use of this is optional.
*Optional — These items are not furnished by all manufacturers.
IS 1710
:1989
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ANNEX B ( Continued )
Part No.
Name of the Part TypicalMaterial
MaterialSpecification
Brief Description and Function of Parts
(1) (2) (3) (4) (5)
13. Depth gauge Measuring device Instruments for indicating liquid level. It may be direct orindirect reading type
14. Discharge case Cast iron IS 210 : 1978 It is situated between top bowl and bottom column pipe andguides flow from one to the other, column pipe.
15. Discharge case bearing Bronze/rubber IS 318 : 1981 Bearing in discharge case which also serves to connect theguides flow from one to the other, column pipe.
16. Stuffing box gland Cast iron/bronze IS 210 : 1978,IS 318 : 1981
This tightens packing at discharge head and guide head shaft.
17. Flanged column Cast iron/steel IS 210 : 1978,IS 2062 : 1984
The column pipe section with bolting arrangement at the twoends.
18. Foot-valve-cum-strainer (not shown in Fig. 2)
Cast iron/steel IS 210 : 1978,IS 2062 : 1984
To hold liquid in column so as to lubricate the bearing of pumps.
19. Guide spinners Cast iron/bronze/ steel
IS 210 : 1978,IS 2062 : 1984 orIS 318 : 1981
To stabilise shaft enclosing tube.
20. Head shaft Carbon steel IS 1570 (Part 5) : 1985 Top shaft passing through the driver hollow shaft andconnecting the line shaft.
21. Head shaft coupling Steel IS 1030 : 1982 It connects head shaft with line shaft.
22. Impeller Cast iron/bronze/ steel
IS 210 : 1978,IS 318 : 1981,IS 3444 : 1987
The rotating elements producing head. It receives liquid andimpels to bowl passage. It may be enclosed or semi-enclosed.
23. Impeller adjusting nut Steel IS 1030 : 1982 Provides on head shaft for adjusting impellers vertically byraising or lowering shaft.
24. Impeller collect Stainless steel/ steel
IS 1570(Part 5) : 1985,IS 7283 : 1974
Spilt taper sleeve for locking impeller on impeller shaft.
IS 1710
:1989
23
25. Impeller seal ring Bronze/cast iron IS 318 : 1981,IS 210 : 1978
Wearing ring providing seal to enclosed impeller. It may beeither on the impeller or in the bowl or on both.
26. Impeller shaft Steel/carbon steel IS 1570 (Part 5) : 1985, IS 7283 : 1974
Impellers are mounted on it. It is coupled to the line shaft.
27. Impeller shaft coupling Steel IS 1030 : 1982 It connects bottom line shaft to impeller shaft, may be tappedwith the two different thread diameters.
28. Line shaft Carbon steel IS 7283 : 1974 Sections of shaft between the impeller shaft and head shaft.
29. Line shaft bearing Rubber/bronze IS 318 : 1981 Bearing for the line shaft sections. Also acts as a coupler forshaft enclosing tube in oil lubricated pumps.
30. Line shaft coupling Steel IS 1030 : 1982 These connects line shaft sections.
31. Water deflector Steel/rubber IS 2062 : 1984 Device to throw off leakage liquid from discharge head gland,thus preventing entry into driver unit.
32. Manual lubricator Lubricator with an arrangement for manually adjusting the oilflow to the line shaft bearing.
33. Non-reverse ratchet Cast iron IS 210 : 1978 Device to prevent reverse rotation of the pump.
34. Open line shaft sleeve Stainless steel/ steel
IS 1570 (Part 5) : 1985 Sleeve operating as journal for the bearing of water lubricatedpumps.
35. Pre-lubricating tank(not shown in Fig. 2)
When supplied, it provides lubricants to the bearing of thepumps.
36. Safety clutch Top half is mounted on the head shaft and bottom half on thedriving shaft for the purpose of disengagement if unscrewingshafts takes place during reverse rotation.
37. Sand collar (suction case) Plastic/bronze IS 318 : 1981 It prevents entry of sand into the suction case bearing.
38. Shaft enclosing tube Steel IS 2062 : 1984 It encloses line shafts.
39. Stuffing box Cast iron/steel IS 210 : 1978,IS 1030 : 1982
Used for sealing of liquid at discharge head along head shaft.Acts also as a guide to the head shaft.
40. Stuffing box packings Asbestos Used in stuffing box for sealing off liquid from discharge head.
41. Suction case Cast iron IS 210 : 1978 It guides the flow into the eye of the lowest impeller and carriesthe suction case bearing of the impeller shaft.
42. Suction case bearing Bronze/rubber IS 318 : 1981 The guide bearing of the impeller shaft located in suction case.
43. Suction case plug Cast iron IS 210 : 1978 It prevents entry of sand into the suction case bearing andprovides a port to grease this bearing.
IS 1710
:1989
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ANNEX B ( Concluded )
Part No.
Name of the Part TypicalMaterial
MaterialSpecification
Brief Description and Function of Parts
(1) (2) (3) (4) (5)
44. Suction pipe Steel IS 1239(Part 1) : 1979 It helps to streamline flow to suction case and provides a safetymeasure in case of draw down level going below the lowestimpeller.
45. Suction strainer It prevents entry of large foreign matter.
46. Surface discharge head Cast iron/steel IS 210 : 1978,IS 2062 : 1984
It supports column and driver and discharge liquid from pumpcolumn.
47. Threaded column IS 1239(Part 1) : 1979, or IS 1978 : 1982
Column pipe with threaded ends.
48. Top bowl bearing Bronze/rubber IS 318 : 1981 A long bearing usually inserted in the top bowl.
49. Top column pipe IS 1239 (Part 1) : 1979, or IS 1978 : 1982
A connecting piece between top column pipe and discharge head.
50. Top column flange gasket Rubber It prevents leakage of liquid from top column flange.
51. Top column pipe Steel IS 2062 : 1984 For suction of column pipe below discharge head.
52. Tube tension nipple Steel/cast iron IS 226 : 1975,IS 210 : 1978
A short piece of shaft tube generally provided at the top end ofshaft tube assembly to provide additional bearing close to thehead shaft or to make up the required length of pump assembly.It is connected to the tube tension plate.
53. Tube tension plate Steel/cast iron IS 2062 : 1984,IS 210 : 1978
Used for tensioning shaft tubes for alignment.
54. Tubing adaptor Steel/cast iron IS 2062 : 1984,IS 210 : 1978
A short piece connecting discharge case to the shaft tube.
55. Underground discharge head
Steel/cast iron IS 2062 : 1984,IS 210 : 1978
Supports driver and column assembly when discharge is belowsurface.
56. Underground dischargetee
Steel IS 1239 (Part 1) : 1979, or IS 1978 : 1982
This takes up discharge below the base plate, also forms part ofcolumn.
IS 1710
:1989
25
ANNEX C ( Clause 7.1 )
NAME OF PARTS COMMONLY USED IN VERTICAL TURBINE PUMPS WITH SOLID SHAFT MOTOR
57. Impeller adjusting nut Steel IS 7283 : 1974 Locks adjusting nut in place so that adjustment cannot changelock screw or washer while pump is in operation.
58. Base plate Cast iron/steel IS 2062 : 1984 Fabricated or casting that supports discharge head and maybecome permanent part of foundation after initial installation.
Part No.
Name of the Part TypicalMaterial
MaterialSpecification
Brief Description and Function of Parts
1. Suction bell Cast iron IS 210 : 1978 It guides the flow into the eye of the lowest impeller.
2. Impeller Cast iron/bronze IS 210 : 1978IS 318 : 1981
The rotating element producing head. It received liquid andimpels it to bowl passage. It may be enclosed or semi-enclosed.
3. Impeller spilt/ringimpeller locknut
Steel IS 7283 : 1974 To lock impeller on shaft.
4. Impeller seal ring Cast iron, bronze IS 210 : 1978 Wearing ring providing water seal to enclosed impellers. Thismay be fitted in bowl or on impellers.
5. Bowl Cast iron IS 210 : 1978 It guides flow received from one impeller to the next impellerabove it and houses impeller and bowl bearing.
6. Impeller shaft Stainless steel IS 1570 (Part 5) : 1985 It holds the rotating impellers and coupled to the line shaft.
7. Shaft sleeve Stainless steel IS 1570 (Part 5) : 1985 Sleeve operating as journal for the boaring lubricated pumps.
8. Bowl-bearing/Top bowl bearing
Rubber, bronze IS 318 : 1981 Bearing used for impeller shaft in each bowl.
9. Impeller key Steel IS 7283 : 1974 For mounting impeller on impeller shaft.
10. Taper rising pipe Cast iron/ steel IS 210 : 1978IS 2062 : 1984
It delivers water from top bowl to column pipe.
11. Impeller shaft coupling Steel IS 1030 : 1982 It connects line shafts to impeller shaft.
12. Stuffing box housing Cast iron/steel IS 210 : 1978IS 1030 : 1982
Used for sealing off liquid at discharge head along head shaft.Acts also as a guide to head shaft provide with sleeve.
IS 1710
:1989
26
ANNEX C ( Concluded )
Part No.
Name of the Part TypicalMaterial
MaterialSpecification
Brief Description and Function of Parts
13. Stuffing box packing Asbestos Used in the stuffing box for sealing off water leaking fromdischarge head.
14. Stuffing box gland Cast iron/ bronze IS 210 : 1978,IS 318 : 1981
This tightens packing at discharge head and guides head shaft.
15. Head shaft/line shaft Stainless steel/ steel
IS 1570 (Part 5) : 1985,IS 2073 : 1970
A shaft connecting the line shaft to motor shaft.
16. Bearing housing Cast iron IS 210 : 1978 It houses thrust bearing which takes care of the thrust load dueto hydraulic axial thrust and weight of rotating parts.
17. Pump half coupling Steel/cast iron IS 1030 : 1982,IS 210 : 1978
It is coupled to pump half coupling and drives head shaft.
18. Impeller adjusting nut Steel IS 7283 : 1974 Provided on head shaft for adjusting impeller vertically.
19. Motor half coupling Steel/cast iron IS 1030 : 1982,IS 210 : 1978
It is coupled to pump half coupling and drives head shaft.
20. Key coupling Stainless steel/ steel
IS 1570 (Part 5) : 1985 Used to fit pump coupling on the shaft.
21. Motor skirt Cast iron/steel IS 210 : 1978,IS 206 : 1984
A part functioning as a base for the motor.
22. Surface discharge head/ underground dischargetee
Cast iron/steel IS 210 : 1978,IS 1239 (Part 1) : 1979,IS 1978 : 1982
It supports driver and column assembly. In case of discharge teeit takes of discharge below the base plates, also forms parts ofcolumn.
23. Foundation base Steel IS 2062 : 1984 It is grouted in the foundation which forms a rigid support. Itsupports column assembly and discharge head.
Bureau of Indian Standards
BIS is a statutory institution established under the Bureau of Indian Standards Act, 1986 to promoteharmonious development of the activities of standardization, marking and quality certification of goods andattending to connected matters in the country.
Copyright
BIS has the copyright of all its publications. No part of these publications may be reproduced in any formwithout the prior permission in writing of BIS. This does not preclude the free use, in the course ofimplementing the standard, of necessary details, such as symbols and sizes, type or grade designations.Enquiries relating to copyright be addressed to the Director (Publications), BIS.
Review of Indian Standards
Amendments are issued to standards as the need arises on the basis of comments. Standards are alsoreviewed periodically; a standard along with amendments is reaffirmed when such review indicates that nochanges are needed; if the review indicates that changes are needed, it is taken up for revision. Users ofIndian Standards should ascertain that they are in possession of the latest amendments or edition byreferring to the latest issue of ‘BIS Catalogue’ and ‘Standards : Monthly Additions’.
This Indian Standard has been developed from Doc : No. HMD 20 (4739).
Amendments Issued Since Publication
Amend No. Date of Issue
Amd. No. 1 August 1991
Amd. No. 2 August 1993
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