Mega Type Series Booklet Centrifugal Pump Application The KSB Ajax Mega centrifugal pump is suitable for handling water, condensate, oil, some aggressive chemical products and other liquids mainly used in the following applications: ● Water supply ● Irrigation ● Air conditioning ● Fire fighting ● Drainage ● Heating ● Chemical and petrochemical ● Sugar and alcohol industry ● Boiler feed ● Auxilary circuits in refineries ● Auxilary circuits in industry (paper, food, synthetic fibres, others) Design Horizontal, single stage, end suction centrifugal pump dimen- sionally built to ISO 2858 and technical specification ISO 5199. The back pull out design allows for easy maintenance and repair as the rotating element may be removed without dis- turbing the pipework. Pump has wear rings as standard and lifting eye on bearing bracket. KSB Ajax Pumps Pty Ltd Designation M 80 - 160 Model / Type Discharge diameter (mm) Nominal impeller diameter (mm) Operating Data 50 Hz 60 Hz Pump sizes Flow up to 150 L/s 175 L/s Head up to Temperature up to Speed up to 2900rpm 3500rpm 32 mm to 150 mm 160 o C 160m
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MegaType Series Booklet
Centrifugal Pump
Application
The KSB Ajax Mega centrifugal pump is suitable for handlingwater, condensate, oil, some aggressive chemical productsand other liquids mainly used in the following applications:
● Water supply● Irrigation● Air conditioning● Fire fighting● Drainage● Heating● Chemical and petrochemical● Sugar and alcohol industry● Boiler feed● Auxilary circuits in refineries● Auxilary circuits in industry (paper, food, synthetic
fibres, others)
Design
Horizontal, single stage, end suction centrifugal pump dimen-sionally built to ISO 2858 and technical specification ISO 5199.The back pull out design allows for easy maintenance andrepair as the rotating element may be removed without dis-turbing the pipework. Pump has wear rings as standard andlifting eye on bearing bracket.
KSB Ajax Pumps Pty Ltd
Designation
M 80 - 160
Model / Type
Discharge diameter (mm)
Nominal impeller diameter (mm)
Operating Data
50 Hz 60 HzPump sizesFlow up to 150 L/s 175 L/sHead up toTemperature up toSpeed up to 2900rpm 3500rpm
32 mm to 150 mm
160oC160m
Mega
2
Selection Chart1450 RPM
Selection Chart2900 RPM
Mega
3
Construction
Horizontal single stage, end suction with vertical discharge.The “back pull out” design allows for the maintenance of thepump without disturbing the pipework connected to the cas-ing, or the pump alignment.The pump is built to the dimensional and technical require-ments of ISO 2858 and ISO 5199. Flanges are in accordancewith AS/NZS 4331.2, ISO 7005-2 and DIN 2533/16 Bar.
CasingSelf-venting horizontal volute casing with horizontal end suc-tion and vertical discharge. The casing has supporting feetand is fitted with a wear ring. The suction nozzle includes avane to reduce prerotation.
ShaftThe shaft is of the dry type, with protection sleeve to preventcontact with the pumped liquid (for packed gland only). Forstandard mechanical seal models the shaft is in contact withthe pumped liquid.
BearingsGrease lubrication – StandardMax. Pump temperature 105oCThe bearing arrangement consists of two deep groove ballbearings lubricated by grease. Bearings are shielded andgreased for life.Note: MH models have oil lubrication as standard.
Oil lubrication – Option L1Max. Pump temperature 160oCThe use of oil as a bearing lubricant is available as an option.Constant level oiler is provided to ensure optimum oil level ismaintained.
Shaft SealThe shaft sealing is carried out by means of gland packing orby mechanical seal.
The standard mechanical seal is a single, unbalanced, elas-tomer bellows seal. The seal is self-aligning and automaticadjustment compensates for abnormal shaft end play, runoutand primary seal wear. The mechanical drive eliminates over-stressing of the elastomer bellows and the single coil springis not affected by a build up of solids. The seal can be re-placed in the field to minimise downtime.Seal operating temperature –30oC to +105oC.
Seal Materials:
PaintingKSB Ajax standard – red oxide undercoat and one coat ofindustrial enamel finish coat.
Hard Faces High PressureStd. Option M3 Option M1
Seal O Ring Nitrile Nitrile NitrileSeal Face Carbon Silicon Carbide CarbonBellows Nitrile Nitrile NitrileRetainerDrive Band 316 316 316Spring HolderSpring HolderSeat Ceramic Silicon Carbide Ceramic
Accessories
DriveThe pump is only recommended for direct drive via a flexiblespacer coupling. Spacer couplings enable utilisation of theback pull out feature.
Where belt drives are necessary a separate jack (intermedi-ate) shaft with bearings to carry the belt loads may be re-quired.
All drive systems, where supplied by KSB Ajax, are appropri-ately protected by suitable guards.
BaseplateBaseplates for electronic drives are available in a variety ofstyles.
Standard: Fixed and grouted directly to the foundation.Anti vibration: Rigid baseplate on rubber mounts.
Rigid baseplate on spring mounts.Rigid baseplate with inertia block and springmounts.
Pump Selection
For pump selection the hydraulic performance curves shouldbe used. These curves are based on water at 15oC and SGequal to 1.0.
NPSH values are indicated on the performance curves. Atleast 0.5m must be added as a safety margin.
To overcome variations between actual and design systemrequirements it is recommended that the driver power ex-ceeds the absorbed pump shaft power:
Peripheral SpeedAfter determining the pump operating speed and checking itsmaximum discharge pressure, the impeller material mustbe checked to ensure that it is suitable with regards to itsperipheral speed, observing the following limits.
- Cast Iron - to 40 m/sec.- Zinc Free Bronze - to 60 m/sec.
* Peripheral speed of 250mm diameter impellers at 3000rpm is 39/sec.
Up to 12Above 12
Approx. 30%Approx. 20%Approx. 10%
Shaft kWDriver Power
ReserveUp to 1.5
Absorbed Pump
Mega
Mechanical Seal Suction Pressure Limits At Various Speeds
Casing - Pressure / Temperature Limits
Flange Ratings - Pressure / Temperature Limits
Bearing Lubrication - Pressure / Temperature Limits
Clean, non aggressive liquids, temperature up to105oC internal sealing
10E Flushing liquid inlet10S Flushing liquid outlet (at 180oC)
S22
S4
Liquids which are toxic, aggressive and/or with badsmell.Also pumps with suction from a vacuum tank. Sealingwith a clean liquid from an external source. (max.temp. + 105oC)Seal liquid: 1 L/min, pressure = 100kPa (1 bar) abovesuction pressure.
Liquids having particles in suspension, or when majorcontamination from the external source is to beavoided.(Sealing t max. = 105oC)Seal liquid: 1 L/min, pressure = 100kPa (1 bar) abovesuction pressure
Water applications where the suction pressureexceeds 300kPa (3 bar)
Any of the above mechanical seals with flushing liquidfrom an external source.
Flushing liquid: 1 L/min ( + 100) kPa
ps = suction pressurepr = differential pressure
Mega
8
ps+pr2
Sealing Arrangements
OptionCode
Standard
Mechanical Seal Application
Mechanical seal with internal flush for clean non-aggressive water.
Maximum suction pressure = see page 4
M1
S3
M3
S2
S1
Mechanical seal with hard faces Silicon Carbide/Silicon Carbide/Nitrile for slightly aggressive water.
Maximum suction pressure = see page 4
Balanced mechanical seal Crane T2US with Carbon/Ceramic/Nitrile for clean non-aggressive water andhigh suction pressures.
Maximum suction pressure = see page 4
Any of the above mechanical seals with seal flusharrangement in accordance with API plan 11.
Any of the above mechanical seals with seal flushfiltered by cyclone separator.
Miminum differential pressure = 70kPa
Mega
9
Dimensions
PUMP W T.SIZE DN1 DN2 a f h1 h2 b1 b2 b g1 g2 i1 m1 m2 m3 n1 n2 n3 n4 s1 s2 v w d l x kg
FLANGE DIMENSIONS AND DRILLING ACCORDING TO AS/NZS 4331.2, ISO 7005 - 2 - 16 BAR(DIN 2533 / PN16)*HOLES - EQUALLY SPACED OFF CENTREOPTIONS: FLANGE DRILLING ACCORDING TO AS129 TABLE ‘E’, ANSI B16-1 125lB
COUPLING END
KEY DIMENSIONS ARE NOMINAL AND ARE EXPRESSED INMILLIMETRES