ApplicationPuri�cation or clari�cation of mineral oils used in marineinstallations and power stations (fuel and lubricating oils).

Working principleSeparation takes place in a solids-retaining bowl that can bearranged for either clari�cation or puri�cation. In both cases,the contaminated oil is fed into the separator through thecentre, and it is separated by centrifugal force into its variousphases, the heaviest phase (sludge and water) being forcedoutwards to the periphery of the bowl. The accumulation ofsludge is periodically removed from the bowl by hand.

InstallationThe oil is pumped, heated, and separated as shown in the�gure. A liquid seal in the separator bowl prevents the oil fromescaping through the water outlet. If this seal is broken, analarm device is activated. With unmanned engine rooms, thesignals are transmitted to a remote control unit. When theseal is broken, the three-way valve shuts o� the oil feed andthe oil is recirculated until the fault is corrected.

Separator model MAB 103B complete with feed/discharge pumpand �ttings for connection to a preheater.

MABSolids-retaining Centrifugal Separator

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A. Oil feed to pumpB. Oil to heaterC. Oil to separatorD. Oil from separator outletE. Liquid-seal supplyF. Water outletG. Air supply for

three-way valve

1. MAB separator2. Oil strainer3. Feed/discharge pump4. Plate heat exchanger5. Three-way valve

6. Pressure switch7. Pressure gauge8. Regulating valve9. Liquid-seal alarm cabinet

10. Air reducing valve

11. Check valve12. Shut-o� valve13. Regulating valve

Schematic installation layout of MAB separator with plate-type oil heater.

Standard designSolids-retaining separator comprisinga frame containing in its lower part ahorizontal drive shaft with friction clutchand brake, worm gear and a verticalbowl spindle. The worm gear is placedin an oil bath.

The bowl is �xed on the top of the spindle inside the space formed by theupper part of the frame and the framehood which also carries the feed anddischarge systems. The frame hood ishinged to facilitate easy access forcleaning the bowl which is of the solid-wall disc type.

Basic equipment• D irty oil inlet device.• Clean oil outlet device with sight glass.• W ater outlet spout.• Li quid seal water inlet.• Set of gravity discs.

• Clari�er parts comprising discharge collar, top disc without neck, and bottom disc without holes.

• Revolution indicator.• Set of resilient mountings.• Set of Standard Spare Parts.• Built-on gear type pump

(combined feed/discharge pump).

Extra equipment• Electric motor.• Starter.• Set of tools.• Set of recommended additional

spares for long-time service.• F lexible connections.• P reheater.• A larm device for broken liquid seal.

Technical documentationComplete information and documen-tation accompany each separatordelivery. The Instruction Book provides

separator operators with detailedinstructions and advice for obtainingoptimal separation.

The Maintenance and Repair Manualdescribes separator dismantling andreassembly. The Spare Parts Cataloguefacilitates the ordering of spare parts.

ServiceAlfa Laval is a worldwide corporationwith its head o�ce in Sweden, anda�liated companies and representativesin about 130 countries. Spares andservice for all Alfa Laval processequipment are provided through theorganization of the Alfa Laval Groupand its representatives.

EMD00064EN 0502 Alfa Laval reserves the right to change speci�cations without prior noti�cation.

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Throughput capacityBlue bar indicates range from mini-mum economical throughput ondetergent type lubricating oil tomaximum recommended through-put on distillate (1.5–5.5 cSt/40°C).

h/l 000 2000 10050 1 500

MAB 103

MAB 104

MAB 102

MAB bowl arranged as a clari�er for separating oils containingsludge and a very small quantity of water.

MAB bowl arranged as a puri�er for separating oils containingsludge and an appreciable quantity of water.

1. Oil inlet2. Clean oil outlet3. Sludge

1

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1

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1. Oil inlet2. Clean oil outlet3. Sludge4. Oil/water

interface5. Water outlet