Sewage Plant Pump

HamworthyB50 x 50HC Series, Medium and High Head,

2-Pole, Sewage,Pumps with 2-Bladed Open Impeller

Part No. 50401520

PCH 1557Issue 1 0200

HAMWORTHY KSE LIMITED

Fleets Corner, Poole, Dorset, BH17 0JT, EnglandTelephone: +44 (0)1202 662600

Facsimile: Spares +44 (0)1202 665444 Sales +44 (0)1202 666363 Service +44 (0)1202 662622

Offices, Associate Companies and Agents throughout the world

WARNING

1. Health and Safety Act Compliance. Before working on this equipment personnel should be madeaware of, and ensure compliance with, the Health and Safety regulations appropriate to this class ofwork.

2. Before lifting, installing and operating the unit, the instructions detailed below, and also theaccompanying the manual, must be read.

3. Ensure that all equipment used for lifting the unit is adequate for the weight. The weight is normallystencilled on the unit and/or stamped on the machine nameplate.

4. The handling points are indicated on the unit and these must be used. The hooks of slings must notbe fitted directly to lifting eyebolts or lugs, shackles must be used.

5. Before running the unit for the first time, the installation must be thoroughly checked and theprocedure Checks Before Running for the First Time, detailed in Section 4 of the manual, shouldbe referred to.

6. The unit must not be run unless all protective guards supplied with the equipment are in position.

7. Before proceeding with maintenance on the unit, or making adjustments to its connections andfittings, it must be stopped and isolated electrically and mechanically and visible warning noticesdisplayed. Some units are on automatic standby duty, or isolators are remote from the unit, andextra care is then necessary to be sure that isolation is complete.

8. Before commencing repair or overhaul a preliminary check of available spares must be made, e.g.replacement set of O-rings, joints or jointing material.

9. Pumps handle various liquids, sometimes not those for which the pump was initially supplied. Knowthe properties of the liquids that have been pumped, and actions necessary to make handling safeand in the event of an emergency.

10. Before commencing work on a pump, close the suction and discharge valves in the system pipelinesand remove the casing drain plug to ensure that the pump interior is at atmospheric pressure.

CONTENTS

SECTION 1 - TECHNICAL DATA................................................................................................................... 1-11.1 STANDARD PUMP PERFORMANCE ............................................................................................. 1-11.2 RECOMMENDED TIGHTENING TORQUE..................................................................................... 1-11.3 MOTOR SPEED............................................................................................................................... 1-11.4 GENERAL DIMENSIONS ................................................................................................................ 1-11.5 ROTATION....................................................................................................................................... 1-11.6 BEARING LUBRICATION ................................................................................................................ 1-1

SECTION 2 - DESCRIPTION ......................................................................................................................... 2-12.1 GENERAL ........................................................................................................................................ 2-12.2 PUMP INNER COVER ..................................................................................................................... 2-12.3 PUMP CASING ................................................................................................................................ 2-12.4 MECHANICAL SEAL........................................................................................................................ 2-12.5 IMPELLER........................................................................................................................................ 2-1

SECTION 3 - INSTALLATION ........................................................................................................................ 3-13.1 INSTALLATION DATA PUMP WEIGHT AND DIMENSIONS....................................................... 3-13.2 INSTALLATION PROCEDURE........................................................................................................ 3-1

3.2.1 General...................................................................................................................................... 3-13.2.2 Pipework.................................................................................................................................... 3-13.2.3 Electrical Installation ................................................................................................................. 3-13.2.4 Direction of Rotation.................................................................................................................. 3-1

SECTION 4 - OPERATION ............................................................................................................................ 4-14.1 CHECKS BEFORE RUNNING FOR THE FIRST TIME................................................................... 4-14.2 PRIMING .......................................................................................................................................... 4-14.3 STARTING THE PUMP.................................................................................................................... 4-14.4 REGULATING FLOW FROM PUMP PUMPED MEDIA WITHOUT SOLIDS ............................... 4-14.5 STOPPING THE PUMP ................................................................................................................... 4-2

SECTION 5 - MAINTENANCE ....................................................................................................................... 5-15.1 GENERAL ........................................................................................................................................ 5-15.2 LUBRICATION ................................................................................................................................. 5-15.3 PREPARATION FOR DISMANTLING THE PUMP.......................................................................... 5-25.4 DISMANTLING PUMP...................................................................................................................... 5-25.5 INSPECTION.................................................................................................................................... 5-25.6 ASSEMBLING PUMP....................................................................................................................... 5-2

SECTION 6 - DRAWINGS.............................................................................................................................. 6-16.1 LIST OF DRAWINGS ....................................................................................................................... 6-1

FIGURESFIGURE 5.1 IMPELLER SHIMMING............................................................................................................. 5-3

TABLESTABLE 5.1 MAINTENANCE SCHEDULE...................................................................................................... 5-5TABLE 5.2 FAULT FINDING CHART............................................................................................................ 5-6

Spare Parts and Service

Spare Parts can be ordered direct from the following address:Hamworthy KSE Ltd. Telephone: +44 (0)1202 662600Fleets Corner Facsimile: +44 (0)1202 665444Poole, Dorset Email: [email protected] 0JT, England

or from any Hamworthy office or agency throughout the world.

When ordering spare parts, the following information is required to ensure that correct parts are supplied:Type and serial number of machine: Obtained from machine nameplateItem Number and full description of part required: Obtained from details in this publication

Technical Service and Advice:Technical service and advice can be obtained during normal working hours from the above address, on thefollowing contact numbers

Telephone: +44 (0)1202 662663Facsimile: +44 (0)1202 662622Email: [email protected]

or via any of our overseas companies or offices

Outside normal working hours a 24 hour emergency facility is available. Initial telephone contact number isEngland +44 (0)1202 662663.

Overseas Hamworthy OfficesCanada Hamworthy Canada Ltd.,

113 Cushman Road, Unit 8,St. Catherines, Ontario. L2M 6S9Tel. +1 905 688 4922Fax. +1 905 688 9028

Norway Hamworthy KSE A/S,Joseph Kellers vei 20TranbyPO Box 83, N-3401 Lier, NorwayTel. + 47 32 85 92 00Fax. + 47 32 85 21 93

China Hamworthy KSE Shanghai Representative Office,Room 7-D Yi Dian Plaza,No. 746 Zhao Jia Bang Road,Shanghai 200030Tel. + 86 21 64455665Fax. + 86 21 64459875

Singapore Hamworthy KSE PTE Ltd,15 Benoi CrescentSingapore 629978Tel. + 65 261 6066Fax. + 65 261 6011

Dubai C/O Aqua Tech,DY 160/1 Al Jadaf, PO Box 62073Dubai, UAETel. + 971 4324 0335Fax. + 971 4324 0336

South Africa Hamworthy Engineering Africa (Pty)LtdP.O. Box 50435,Randburg 2125, Johannesburg.Tel. + 27 11 7923886Fax. + 27 11 7923889

Holland Hamworthy KSE BV,Bristolstraat 1, 3047 A.B.,Rotterdam, NetherlandsTel. + 31 10 462 4777Fax. +31 10 415 9046

U.S.A.Georgia

Hamworthy KSE Inc.,1129 Hospital Drive, Suite 3C,Stockbridge, Georgia 30281.Tel. +1 770 507 8900Fax. +1 770 507 8989

India Hamworthy KSE Pvt LtdC-155 Mittal Court, Nariman Point,Mumbai 400 021 IndiaTel. + 91 22 2872394Fax. + 91 22 2872394

New Jersey 187 Route 34Matawan, NJ 07747New JerseyTel: + 732 583 5115Fax: + 732 583 5116

Korea Hamworthy KSE Korea Ltd.14th Floor Hyundai Building #1193-5Choryang 3 dong, Dong-gu,Pusan, Korea (601-013)Tel: + 8251 465 8461Fax: + 8251 463 7498

New Orleans 1418 Edwards AvenueSuite BNew OrleansLouisiana 70123Tel: +1 504 734 5525Fax: +1 504 734 5716

Hamworthy Agents Worldwide

Abu Dhabi Ali & Sons Co.Ali & Sons Co. BuildingTourist Club, PO Box 915Abu Dhabi, U.A.E.Tel. + 971 2 723900Fax. + 971 2 723901

Egypt International Marine CenterPO Box 95 (21321)ImbrahimiehAlexandria, EgyptTel. + 203 483 6959Fax. + 203 483 7969

Sultanateof Oman

Trans-Oceanic Trading Est.PO Box 4892Postal Code 112, RuwiSultanate of OmanTel. + 968 798503Fax. + 968 702981

Argentina Neptune S.A.Calle Mendoza 3185 - 5 - B1428 - Buenos AiresArgentinaTel. + 54 1 322 6041Fax. + 54 1 322 5790

France Etablissements Tiano2 Bis Rue de la BaumeParis 75008, FranceTel. + 33 1 4561 9932Fax. + 33 1 4225 6962

Pakistan United TradersHaroon ChambersAltaf Hussain Road,Karachi 74000, PakistanTel. + 92 21 241 4916Fax. + 92 21 241 6862

Australia Caba (Aust.) Pty. Ltd.41 Barry AvenueMortdale, N.S.W. 2223AustraliaTel. + 61 29 534 2100Fax. + 61 29 533 5332

Germany Wilhelm Rump KGBuchheisterstrasse 620457 Hamburg, GermanyTel. + 49 40 317842-0Fax. + 49 40 3194841

Poland Romac Ltd.80/463 Gdansk,Ciolkowskigo 7A/25PolandTel. + 48 58 347203Fax. + 48 58 3463694

Bangladesh Marinetec Ltd.30 Agrabad Commercial Area,PO Box 2018Bandar, ChittagongBangladeshTel. + 880 31 502834Telex: 66466

Greece Alpha Marine Engineering Ltd.38 SalaminosGR 16674 GLYFADA,Athens GreeceTel: + 301 89 43 220Fax. + 301 96 80 210

Qatar Al Ahed Trading &Contracting CompanyPO Box 3266, Doha, QatarTel. + 974 414022Fax. + 974 414021

Brazil Tridente BrazilRua Visconde de Inhuama,134 GR 1513Centro - Rio de Janeiro RJ20091-100, BrazilTel. + 55 21 233 1489Fax. + 55 21 233 7187

ItalyGenoa

S.I.R.N. s.r.l.22/1 Via Casaregis, 16129GenoaTel. + 39 0 10 586771Fax. + 39 0 10 542678

Spain Aries Industrial Y Naval S.A.Parque de las NacionesEdificio GermaniaGuzman el Bueno 133Madrid 28003, SpainTel. + 34 91 533 9200Fax. + 34 91 534 7402

Bulgaria Dawcul Ltd. Cherni Vrah Bul,BL NO 4VH A, 1421 Sofia,BulgariaTel. + 359 2 963 0156Fax. + 359 2 962 5217

Trieste 22/1 Via Del LazzarettoVecchio,9.34123, TriesteTel. + 39 0 40 304247Fax. + 39 0 40 308196

Venezuela Oficini Maritima PI. C.A.Edif Torre La PrevisoraPiso 7, Sabana GrandeAptdo 60710, Caracas 1060AVenezuelaTel. + 58 2 7817897Fax. + 58 2 781 9457

Chile Lanz Y Cia LtdaCalle Dr. Barros Borgono 233.Casilla 16389Santiago, ChileTel. + 56 2 235 2707Fax. + 56 2 235 7329/1070

Israel B. Sofer & Co. Ltd.PO Box 221,Avichail 42910 IsraelTel. + 972 9882 2319Fax. + 972 9862 5211

Columbia Consul Naval LtdaEdificio ColsegurosOficina 501Calle Cochera del GobernadorCartagena, Columbia S.A.Tel. + 575 664 6413Fax. + 575 664 1640

Kuwait The Trading & IndustrialEquipment Co. (WLL)(TIECO),PO Box 2159,13022, Safat, KuwaitTel. 00965 4810385Fax. + 965 4810387

Denmark Berendsen PMC A/S,Telefonvej 6,DK 2860 Soborg, DenmarkTel. + 45 70 21 21 21 ext 421Fax. + 45 39 54 85 11

Malta Thos. C. Smith & Co. Ltd.12 St Christopher StreetValetta, MaltaTel. + 356 625071Fax. + 356 247182

Ecuador Sertemar Ltd. El Oro 1303 YGuaranda, PO Box 5899Guayaquil, Ecuador S.A.Tel. + 593 4 345105/340325Telex. 043741 AM BU SL

NewZealand

Caba (New Zealand) Ltd37 Clyde StreetWhangarei, New ZealandTel. + 64 94 383661Fax. + 64 94 30854

V11

CAUTION

NOTICE TO ALL USERS OF HAMWORTHY KSE

SPARE PARTS

EQUIPMENT FAILURES HAVE BEEN EXPERIENCED AS A DIRECT RESULT OF OURCUSTOMERS USING LOW QUALITY SPARE PARTS SUPPLIED BY COMPANIESOTHER THAN HAMWORTHY (OR THEIR APPOINTED AGENTS). PLEASE NOTE

THAT WARRANTY CLAIMS MAY BE INVALIDATED AS A DIRECT RESULT OF USINGNON-ORIGINAL SPARES.

STATUTORY RIGHTS ARE NOT AFFECTED.

SECTION 1 - TECHNICAL DATA

Page 1-1


1.1 STANDARD PUMP PERFORMANCE

Pump type Capacity HeadB50 x 50HC Medium Head Up to 35 m3 /hr Up to 18 MetresB50 x 50HC High Head Up to 42 m3 /hr Up to 25 Metres

1.2 RECOMMENDED TIGHTENING TORQUE

Impeller Screw (Item 8) 3. 0 kg mStud and Nut (Item 22 and 23) 5.0 kg mBolt and Nut (Item 19 and 20) 3.0 kg m

1.3 MOTOR SPEED

50 Hz (2 pole) 2925 rev/min.60 Hz (2 pole) 3525 rev/min.

1.4 GENERAL DIMENSIONS

Refer to the General Arrangement drawing supplied with the contract documents for maximum equipmentweight, dimensions and the minimum clearance needed for dismantling.

1.5 ROTATION

The direction of rotation is clockwise when looking at the non-drive end of the pump.

1.6 BEARING LUBRICATION

The motor bearings must be lubricated as detailed in the motor manufacturers handbook.


Page 1-2

SECTION 2 - DESCRIPTION

Page 2-1


2.1 GENERAL

These pumps are horizontal close coupled centrifugal units with a 2-bladed open impeller of the non-clogtype. They are designed for capacities up to 40 m3/h and operate at 2-pole motor speeds.

The medium head pump is suitable for heads up to 18 metres. The high head pump is suitable for heads upto 25 metres.

The pumps are particularly suited for effluent discharge, sump drainage and handling dirty water containingsolids up to 25mm. diameter.

2.2 PUMP INNER COVER

The inner cover is bolted onto the electric motor and houses the mechanical seal.

2.3 PUMP CASING

The pump casing is bolted to the inner cover and incorporates the suction branch which is in-line with themotor shaft, and the discharge branch which is arranged at right angles with the suction branch.

2.4 MECHANICAL SEAL

The mechanical seal arrangement comprises two basic parts, a stationary seal ring, located in the pumpcover, and a rotating seal ring, carried on the impeller hub. A spring maintains pressure between the sealfaces, and lubrication is by the pumped fluid. Circulation passages are arranged to maintain flow rate andprevent the accumulation of sediment.

2.5 IMPELLER

The impeller is keyed to the motor shaft and retained by a screw and lockwasher. A shim is fitted at thebottom of the impeller hub to permit the running clearance to be correctly set between the impeller and innercover.


Page 2-2

SECTION 3 - INSTALLATION

Page 3-1


3.1 INSTALLATION DATA PUMP WEIGHT AND DIMENSIONS

The maximum weight of the pump, the overall dimensions, and the minimum clearances for removal of partsare shown on the General Arrangement Drawing, normal supplied with the contract documents.

For dimensional data on any particular installation, reference must always be made to the GeneralArrangement drawing.

3.2 INSTALLATION PROCEDURE

3.2.1 General

It is of the utmost importance that sufficient space is provided around the pump to allow personnel access,and to facilitate removal and installation of components during normal maintenance routines. It is advisableto leave adequate headroom above the unit for crane joists or lifting tackle. Minimum required clearancedimensions for components removal are shown in the General Arrangement drawing supplied with thecontract documents.

3.2.2 Pipework

All pipework should be constructed so that pipe strains are eliminated and the unit protected against frost.

Pipe fittings must fit easily without strain and suction and discharge pipes must be supported independentlynear the pump so that no strain is transmitted to the pump casing. The bore of the suction line must NOT beless than the pump suction flange nominal bore.

Suction piping must be absolutely air tight and as short as possible, avoiding bends and elbows. Also, itshould be between one and two sizes larger than the suction opening of the pump if the suction line exceeds15m (50ft) in length. Care should be exercised in laying, to eliminate loops which create air pockets. Ifpossible, check with water pressure for leaks.

3.2.3 Electrical Installation

Each installation must be wired in accordance with recognised standards of practice. Earth continuity mustbe provided for all exposed metalwork of electrical apparatus, cable sheaths and armour, cable glands,conduits, ducts, trunking, etc. Flexible conductors must be provided to earth resiliently mounted equipment.

Ensure that overload relays are set to the correct current rating of the motor(s) they are protecting.

3.2.4 Direction of Rotation

On initially starting the pump, ensure that it is running in the direction indicated by the arrow on the pumpbody. If the direction is incorrect, the wiring connections at the motor terminal box must be reversed.


Page 3-2

SECTION 4 - OPERATION

Page 4-1


WARNING: 1. DO NOT ATTEMPT TO START THIS PUMP UNTIL THE INSTRUCTIONBOOK HAS BEEN READ AND UNDERSTOOD.

2. DO NOT ATTEMPT TO MAKE ADJUSTMENTS TO THE PUMP, ITSCONNECTIONS OR FITTINGS WHILST THE MACHINE IS RUNNING.

3. DO NOT ATTEMPT TO RUN THE PUMP WITHOUT ADEQUATEGUARDING.

4. HEALTH AND SAFETY ACT COMPLIANCE: BEFORE OPERATING THEEQUIPMENT, USERS MUST BE MADE AWARE, AND ENSURECOMPLIANCE WITH, THE HEALTH AND SAFETY REGULATIONSAPPROPRIATE TO THIS CLASS OF WORK.

5. OPERATORS SHOULD BE ADEQUATELY QUALIFIED PERSONNELFAMILIAR WITH THIS TYPE OF EQUIPMENT.

4.1 CHECKS BEFORE RUNNING FOR THE FIRST TIME

Before running the machine for the first time after installation or maintenance, proceed as follows:

1. After initial installation, fill the pump with the liquid to be pumped (see Priming, below).

2. Rotate the pump manually through at least one revolution to ensure that the pump is free to rotate. (Itmay be necessary to remove the motor fan shroud to achieve this).

3. Check that the motor bearings are lubricated as detailed in the motor manufacturers handbook.

4. Ensure that the suction and discharge line stop valves are in the Open position.

5. On initially starting the pump, ensure that it is rotating in a clockwise direction when viewed from thedriving end of the shaft. If rotation is incorrect, reverse any two wiring connections at the terminal.

4.2 PRIMING

The pump can be primed by filling with the liquid to be pumped. The installation of a tee in the dischargeline just above the pump will provide a means of filling. Remove the priming plug and pour liquid throughthe open branch of the tee until the pump and suction line are completely filled, then replace the priming plugand start the pump.

4.3 STARTING THE PUMP

1. Prime the pump in accordance with instructions under Priming.

2. Make sure suction and discharge valves are open. DO NOT START PUMP AGAINST A CLOSEDDISCHARGE VALVE.

3. Start motor.

4.4 REGULATING FLOW FROM PUMP PUMPED MEDIA WITHOUT SOLIDS

The quantity of fluid delivered by the pump is regulated by opening or closing the delivery valve to give therequired rate of flow. Care must be taken not to overload the motor or reduce the rate of flow to such asmall capacity that over-heating of the pump will occur.


Page 4-2

CAUTION

WHEN PUMPING MEDIA CONTAINING SOLIDS, THE DISCHARGE RATE MUST NOT BE REGULATEDBY THE DELIVERY VALVE.

4.5 STOPPING THE PUMP

To stop the pump, stop the motor.

SECTION 5 - MAINTENANCE

Page 5-1


WARNING: 1. BEFORE PROCEEDING WITH MAINTENANCE OF THE PUMP, IT MUST BESTOPPED AND ISOLATED ELECTRICALLY AND MECHANICALLY ANDVISIBLE WARNING NOTICES DISPLAYED. SOME UNITS MAY BE ONAUTOMATIC STANDBY DUTIES. ISOLATORS MAY BE REMOTE FROM THEPUMP. IN THESE CASES EXTRA CARE IS NECESSARY TO BEABSOLUTELY SURE THAT ISOLATION OF THE UNIT IS COMPLETE.

2. PUMPS HANDLE VARIOUS LIQUIDS, SOMETIMES NOT THOSE FOR WHICHTHE PUMP WAS INITIALLY SUPPLIED. KNOW THE PROPERTIES OF THELIQUIDS THAT HAVE BEEN PUMPED, TAKE ANY ACTIONS NECESSARY TOMAKE SAFE AND BE AWARE OF THE RECOMMENDED PROCEDURES TOFOLLOW IN THE EVENT OF AN EMERGENCY.

3. HEALTH AND SAFETY ACT REQUIREMENTS COMPLIANCE: BEFOREWORKING ON THIS EQUIPMENT PERSONNEL MUST BE MADE AWARE OF,AND ENSURE COMPLIANCE WITH, THE HEALTH AND SAFETYREGULATIONS APPROPRIATE TO THIS CLASS OF WORK.

4. ONLY ADEQUATELY QUALIFIED PERSONNEL FAMILIAR WITH THIS TYPEOF EQUIPMENT SHOULD CARRY OUT MAINTENANCE OR ADJUSTMENTS.

5. DO NOT ATTEMPT TO REPAIR OR OVERHAUL THE PUMP UNTIL THISINSTRUCTION BOOK HAS BEEN STUDIED.

6. BEFORE COMMENCING ANY WORK A CHECK OF AVAILABLE SPARESSHOULD BE MADE, E.G. REPLACEMENT OF O-RINGS, JOINTS, SEALS.

7. BEFORE ATTEMPTING TO DISMANTLE THE PUMP, ENSURE THAT THEPUMP SUCTION AND DELIVERY VALVES ARE CLOSED AND THAT THECASING DRAIN PLUG IS REMOVED.

5.1 GENERAL

The item numbers in the text refer to the item numbers called up on D8103 Sectional Arrangement includedin Section 6. When ordering spare parts or in any correspondence relating to the pump, the unit numberstamped on the nameplate must be quoted. Please also give the drawing and item number and fulldescription of the item required as quoted on the appropriate List of Parts and Sectional Arrangementdrawing.

A complete pump and motor are readily available as standard spares so that should trouble be experiencedwith either of these relatively small items it can be quickly remedied without interfering with the normal dutiesof the unit.

A maintenance schedule is given in Table 5.1, and a fault finding chart in Table 5.2, located at the end ofsection 5.

5.2 LUBRICATION

The pump requires no lubrication.

The motor bearings on the B50 x 50HC must be lubricated as detailed in the motor manufacturers handbook(most motors will have Sealed-For-Life bearings).


Page 5-2

5.3 PREPARATION FOR DISMANTLING THE PUMP

1. Ensure that the electrical power supply to the motor is switched off.

2. Shut the suction and delivery valves in the system pipelines.

3. Remove the drain plug (27) and joint washer (28) from the pump casing.

5.4 DISMANTLING PUMP

REFER TO SECTIONAL ARRANGEMENT DRAWING D8103

1. Remove the bolts securing the electric motor to its seating and the nuts (20), washers (34) and bolts (19)securing the inner cover to the casing.

2. Withdraw the motor and pump from the casing and remove the O-ring seal (15)

3. Bend back the locking tab washer (17) and remove the impeller screw (8), tab washer and O-ring (14).

4. Turn the impeller (5) so that the jacking screw holes are horizontal, as shown on the SectionalArrangement drawing, and screw in the two jacking screws to withdraw the impeller.

5. Withdraw the stationary part of the mechanical seal (16) from the inner cover (2) and the rotating partfrom the impeller.

6. Remove the nuts (23) and spring washers (25) and remove the inner cover from the electric motor.

7. Remove the peel-off shim (11) and the liquid thrower (10).

5.5 INSPECTION

Thoroughly clean and examine all components for corrosion, cracks, wear or any other damage and renewany parts found defective. If the mechanical seal faces are damaged, the complete seal assembly must berenewed. The O-ring seals (14, 15) and tab washer (17) must be replaced with new ones.

5.6 ASSEMBLING PUMP

1. Position the liquid thrower on the motor shaft and the inner cover on the motor. Fit the spring washers(25) and nuts (23).

2. Impeller Shimming:

To determine the amount of shimming required between the impeller and motor shaft:

a) Position a new peel-off shim (11) in the bore of the impeller (5) (do not fit mechanical seal at thisstage).

b) Line up the keyway in the impeller with the key in the motor shaft and push the impeller onto theshaft.

c) Place the tab washer (17) on the impeller screw (8) and fit the screw into the tapped hole in the endof the motor shaft. Fully tighten the screw but do not lock it at this stage.

d) With the aid of feeler gauges, measure the clearance between the rudimentary vanes at the back ofthe impeller and the inner cover (see figure below). This dimension should be 0.457mm 0.076mm(0.018 0.003 in). Subtract 0.457mm (0.018 in.) from the measurement obtained. The resultantfigure is the amount of shimming which needs to be removed from the peel-off shim.


Page 5-3

e.g.

Clearance measured 0.991 mm (0.039 in)Deduct required clearance 0.610 mm (0.024 in)Total to be removed from shim 0.381 mm (0.015 in)

Note: Each lamination of shim is 0.076 mm (0.003 in)

Therefore, the amount of laminations to be removed from the shim is 0.381 mm (0.015 in) or fivelaminations. A new peel-off shim is 20 laminations or 1.524 mm (0.060 in) thick.

FIGURE 5.1 IMPELLER SHIMMING

e) Ensure that the end of the motor shaft key does not protrude beyond the end of the motor shaft orthe peel-off shim pack will be fouled.


Page 5-4

f) Remove the impeller screw and tab washer and withdraw the impeller from the motor shaft.

g) Remove the peel-off shim from the bore of the impeller and remove the number of laminationsdetermined in (d) above.

3. Smear the inside of the impeller bore with grease.

4. Fit the mechanical seal as follows:

a) Ensure the ceramic seat is fully inserted into the cup rubber. Lubricate the outside diameter of thecup rubber and also the bore of the recess in the inner cover, which locates the stationary seat, withsoft hand soap and water.

b) Feed the cup rubber and ceramic seat into the recess and press into position ensuring an evenpressure over the whole of the ceramic seat face. Make sure that the cup rubber and seat arepressed fully home.

c) Stand the pump, less casing and impeller, vertically with the impeller end of the shaft uppermost.

d) Lubricate the bore of the bellows with soft hand soap and water.

e) Apply soft hand soap and water to the outside diameter of the impeller hub, and pass the bellows ofthe mechanical seal carefully over the taper on the hub (rubber end first) until the bellows contactsthe hub shoulder.

f) Ensure that the impeller adjusting peel-off shim (11) is in position on the shaft end.

g) Line up the keyway in the impeller hub with the shaft key, locate the bore of the hub with the shaftend and push the impeller fully onto the shaft.

5. Carefully position the liquid thrower on the impeller hub.

6. Secure the impeller with the impeller screw (8) and tab washer (17). Lock the screw with the tabwasher.

Note:

Installation of the seal unit, to its working length, should be completed with 15 minutes to ensure that thebellows is correctly positioned before it permanently grips the impeller hub.

7. Place a new O-ring seal (15) on the inner cover (2) and position the motor and pump assembly on itsmounting and secure the inner cover to the casing with bolts (19), washers (34), and nuts (20).

8. Fit the bolts and washers securing the motor to its mounting.


Page 5-5

TABLE 5.1 MAINTENANCE SCHEDULE

Item Action Every Year or 8,000hrsEvery 4 Years or

20,000 Hrs

Inspect XO-Ring Seals

Replace X

Inspect XMechanical Seals

Replace X

Pump Casing Inspect X

Impeller Key Inspect X

NOTE:

1. Where running hours and time are quoted, the shorter period is the criterion if the component is adynamic part.

2. All clearances and parts should be checked as routine if the unit is dismantled for any reason.

3. This table is for guidance only and indicates the minimum recommended schedule. This may be variedwhere, for specific conditions, operating experience indicates that a difference schedule would bebeneficial


Page 5-6

TABLE 5.2 FAULT FINDING CHART

Fault Cause Remedy

Delivery valve closed. Open valve.

Suction valve closed. Open suction valve.

Blocked suction pipework Clean suction pipeworkNo Discharge

Water level beyond maximum lift

of pump.

Change the set up to improve

suction head.

Air leaks or upturned loops in

suction pipework.

Attend to joints and glands in

suction system and check run of

pipe for loops.Reduced and/or Irregular

Discharge

Choked impeller. Dismantle and clean.

Valve or non-return valve partially

closed.

Attend to valve or non-return

valve.Reduced Output and High

Temperature Actual total head exceeds max.

generated by pump.

Consult our Technical Department

giving full particulars.

Pump Absorbing Excessive Power Worn motor bearing. Renew bearing.

SECTION 6 - DRAWINGS

Page 6-1


6.1 LIST OF DRAWINGS

Drawing Number Drawing TitleD8103 Sectional Arrangement, B50x50HC 2-Pole Sewage PumpA21980/ A21981 General Arrangement, B50x50HC 2-Pole Sewage Pump


Page 6-2


Page 6-5

Items List for B50x50HC 2-Pole Sewage PumpDrawing D8103, Issue 1, Sheet 2 of 3

ITEMS LIST INDEX SHEET

SHEET No. DESCRIPTION G.O.3a Standard Bronze Pump Standard3b Standard Cast Iron Pump Standard


Page 6-6

Items List for B50x50HC 2-Pole Sewage PumpDrawing D8103, Issue 1, Sheet 3a of 3

ITEM DESCRIPTION MATERIAL QTY.

1 Pump Casing B.S.1400 LG2 12 Inner Cover B.S.1400 LG2 15 Impeller B.S.1400 AB1 18 Impeller Screw B.S.970 431s29 110 Liquid Thrower Oil Resisting Rubber 111 Peel-off Shim Brass 114 O-ring (impeller) Nitrile Synthetic Rubber 115 O-ring (casing) Nitrile Synthetic Rubber 116 Mechanical Seal Carbon/Ceramic/Nitrile/316ss 117 Tab Washer Monel 119 Bolt H.T.S. Grade 8.8 620 Nut H.T.S. Grade 8.8 622 Stud Mild Steel Grade 4.8 423 Nut Mild Steel Grade 4.8 425 Spring Washer Spring Steel 426 Nameplate Aluminium 127 Plug Brass 328 Joint Copper 329 Stud Mild Steel Grade 4.8 430 Nut Mild Steel Grade 4.8 431 Key Key Steel 134 Washer Mild Steel 639 Jacking Screw Mild Steel 250 Motor 1


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Items List for B50x50HC 2-Pole Sewage PumpDrawing D8103, Issue 1, Sheet 3b of 3

ITEM DESCRIPTION MATERIAL QTY.

1 Pump Casing B.S.1452 Grade 250 12 Inner Cover B.S.1452 Grade 250 15 Impeller B.S.1400 AB1 18 Impeller Screw B.S.970 431s29 110 Liquid Thrower Oil Resisting Rubber 111 Peel-off Shim Brass 114 O-ring (impeller) Nitrile Synthetic Rubber 115 O-ring (casing) Nitrile Synthetic Rubber 116 Mechanical Seal Carbon/Ceramic/Nitrile/316ss 117 Tab Washer Monel 119 Bolt H.T.S. Grade 8.8 620 Nut H.T.S. Grade 8.8 622 Stud Mild Steel Grade 4.8 423 Nut Mild Steel Grade 4.8 425 Spring Washer Spring Steel 426 Nameplate Aluminium 127 Plug Brass 328 Joint Copper 329 Stud Mild Steel Grade 4.8 430 Nut Mild Steel Grade 4.8 431 Key Key Steel 134 Washer Mild Steel 639 Jacking Screw Mild Steel 250 Motor 1


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TECHNICAL DATASTANDARD PUMP PERFORMANCE

DESCRIPTIONINSTALLATIONGeneralPipeworkElectrical InstallationDirection of Rotation

OPERATIONMMAINTENANCEDRAWINGSLIST OF DRAWINGS

Sewage Plant Pump

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Transcript of Sewage Plant Pump