ApplicationPurification or clarification 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 clarification or purification. 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 thefigure. 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 off the oil feed andthe oil is recirculated until the fault is corrected.

Fig. 1. Separator model MAB 103B complete with feed/dischargepump and fittings for connection to a preheater.

E

G10

12

1

9

5

11

2

13

3

B

F

4

67

8D

C

A

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-off valve13. Regulating valve

Fig. 2. Schematic installation layout of MAB separator with plate-type oil heater.

MABSolids-retaining Centrifugal Separator

Throughput capacityBlue bar indicates range from minimum economi-cal throughput on detergent type lubricating oil tomaximum recommended throughput on distillate(1.55.5 cSt/40C).

Model

MAB 103

0 500 1000 1500 2000 l/h

MAB 104

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 fixed 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 equipmentDirty oil inlet device.Clean oil outlet device with sight glass.Water outlet spout.Liquid seal water inlet.Set of gravity discs.

Clarifier 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 equipmentElectric motor.Starter.Set of tools.Set of recommended additional sparesfor long-time service.Flexible connections.Preheater.Alarm device for broken liquid seal.

Technical documentationComplete information anddocumentation accompany eachseparator delivery. The installation

Data Manual provides information toensure correct installation, and theInstruction Book provides separatoroperators with detailed instructions andadvice for obtaining optimal 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 office in Sweden, andaffiliated companies and representativesin about 130 countries. Spares andservice for all Alfa Laval processequipment are provided through theorganization of the Alfa Laval Groupand its representatives.

Fig. 3. MAB bowl arranged as a clarifier for separating oilscontaining sludge and a very small quantity of water.

Fig. 4. MAB bowl arranged as a purifier for separating oilscontaining sludge and an appreciable quantity of water.

1. Oil inlet2. Clean oil

outlet3. Sludge

1

22

3 3

1

22

5 5

44

3 3

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

interface5. Water outlet

340-PD1en-0106

How to contact Alfa LavalContact details for all countries are continually updated on our website.Please visit www.alfalaval.com toaccess the information direct.