The new Alfa Laval Separation Unit is a fully integrated, modularised oil cleaning system that has the lowest installa-tion costs and operating costs. It is a small and very compactsystem and has the highest separation efficiency onthe market.

ApplicationThe Alfa Laval Separation Unit is specifically designed forcleaning a wide range of fuel oils and lubricating oils for alltypes of diesel engines found in the marine and power industries.

• Heavy Fuel Oils with high densities up to 1010 kg/m3

and viscosity up to 700 cSt/50°C. (Higher viscosities onrequest.)

• Lubricating oils for all slow, medium and high speed dieselengines.

• Distillate and light diesel oils (MDO).

The Separation Unit is suitable for shipbuilders and ship operators in newbuilding applications; power plant builders

and operators; diesel engine builders and in retrofitapplications to replace or supplement existing cleaningsystems.

The Separation Unit range has seven sizes to suit all capacityrequirements.

ConceptThe Separation Unit is a totally new approach to cleaningfuels and lubes. It combines a new separator and its ancillarycomponents, together with control system and starter box, ina fully integrated modular design on its own base plate.

In laboratory tests, it has been measured as having thehighest separating efficiency on the market. It can be furthercombined with a unit for heating and pumping to form aSystem Module.

More combinations of system modules are also available, together with several more options to suit the installation oroperators requirements:

Fig. 1. Separation unit.

Separation unitCleaning system for fuel and lube oils

• Single System ModuleComprising a heater (steam, electric,hot water or thermal oil) and a threescrew pump connected to theSeparation Unit.

• Double System ModuleTwo complete separation systems,with their own heaters and pumpsand interconnecting pipework, on amodule base.

• Sludge Removal KitA unique sludge handling system,which takes care of the dischargedsludge and water with its own smalltank and pump set.

• Remote ControlThe Separation Unit can be operatedremotely from a control room usingREMIND™ software.

Operating principleUntreated oil, heated to the correcttemperature, is fed continuously to theseparator for cleaning of impurities.After centrifugal separation, cleaned oilis continuously pumped away and sepa-rated sludge and water accumulate atthe bowl periphery.

The system operates on the ALCAPprinciple, therefore a water transducerin the clean oil outlet measures thecapacitive resistance, and signalschanges to the control unit EPC 50.Water is then removed either by open-ing of the drain valve or through the discharge ports in the bowl during asludge discharge. The EPC 50 auto-matically controls the method of waterremoval depending on the water

content. The total losses of sludge, oiland water during the discharge processis considerably less than any previousseparator model due to bowl size,longer discharge interval and accuratecontrols. The CentriShoot dischargeprocess incorporates a patented flexibledischarge slide.

The separator is driven by an electricmotor via a friction clutch and belt. Theseparator bowl is fixed at the top of aspindle, which is supported by bearingsand special composite springs. Theseparator design incorporates a sludgeevacuation which is absorbed by thecasing and allows the sludge volume tobe discharged to a sludge tank. As anoption a small intermediate sludge tank isavailable. This means that the conven-

tional sludge tank under the separatorcan be avoided, and the associatedvent pipe and heating coil are not needed.The Sludge Removal Kit takes care of thesludge by pumping automatically to themain sludge holding tank.

No adjustments are necessary in the bowl. No gravity discs are fitted. A patented paring tube adapts itself to remove the water from the bowl and a paring disc pumps away thecleaned oil.

The EPC 50 control system master-minds the entire operation of theSeparation Unit, with monitoring of control and alarm functions. Specialtext messages indicate process parameters and alarms on the LED

Paring tube

Seal ring

Discharge ports

Discharge slide

CentriLock™

Untreated oil

Clean oil outlet

Water outlet

Sludge outlet

Conditioning water

Opening water

Closing waterWater inlet

TT PT PT MT

PT

Inlet foruntreated oil

Oilreturn

Clean oiloutlet

Water outlet

1 2 3 4 5 7 8 9 10

6

14

13

11

Optional

12

EPC-50

1. Feed pump2. Heater3. Temperature transmitter4. Pressure transmitter, oil5. Pneumatically controlled

change-over valve

6. Control unit7. Pressure transmitter, oil8. Water transducer9. Regulating valve

10. Pneumatically controlledshut-off valve

11. Solenoid valve block,water

12. Separator13. Pressure transmitter,

water14. Drain valve

Fig. 3. System layout.

Fig. 2. Separator bowl.

display, which is available in several languages. The EPC 50 and the starterbox combine to form the ControlCabinet, which is type approved bymany classification societies.

Features & Benefits• Small footprint and compactness

gives flexibility in positioning in theengine room and saves space.

• Installation ease as all componentsand hardware are pre-installed. Thissaves significant costs, installationmanhours, design and materialscompared with loose components.

• Longer service intervals mean thatplanned maintenance is performedless often and spare parts consump-tion is reduced to give low operatingcosts.

• Separation efficiency of over 85% for 5 micron particles tested in thelaboratory ensures the best removalof harmful contaminants.

• No water tank needed to supplyoperating water, saving materialsand installtion costs.

• Same design for fuels and lube oil!Operators have one type of systemfor operation, maintenance and spareparts.

• Pre-tested system means that allfunctions are tested and approved atthe factory, giving quicker commis-sioning.

• CentriLock™ non-threaded lock ringmeans quick opening of the bowl and no heavy lock ring spanner andhammer!

• Sludge Removal Kit, optional for lubeand diesel oil, avoiding the need for asludge tank under the separatorresults in considerable savings inmaterial and installation costs.

• Remote control is available in severaloptions. REMIND software is includedwith every delivery. Network solutionsusing REMIND and SATTBUS com-munication or PROFIBUS and ownsoftware allow remote operation froma control room.

Separation Unit and System ModulesThe Separation Unit can be manu-factured with heaters and pumps toform system modules in differentcombinations to suit machine roomlayouts.

Displacementwater

Oil recirculation

Untreated oil inlet

Clean oil outlet

1

2

3

4

5

6

7

8

9

10

Sludge outlet

Water out

1. Separator2. Operating water solenoid block3. Service shelf4. Operating air solenoid block5. Water transducer

6. Change-over valve7. Pressure transmitter (oil outlet)8. Control cabinet9. Temperature transmitter

10. Sludge Removal Kit (optional)

Fig. 4. Schematic systemlayout diagram.

Single system module (Separation Unit withHeating and pumping system).

Double system module. In-line configuration (two Separation Units with heaters and pumps).

Consult Alfa Lavalfor the best module

solution for you!

Separation unit.

OperationsPreventive maintenance procedures are much quicker and simpler and nohydraulic compression tool is required.The patented CentriLock™ lock ring,needs only an Allen key, instead of theconventional lock ring spanner andheavy hammer for removal.

• Maintenance intervals– Inspection Service every

4000 h or 6 months.– Overhaul Service every

12000 h or 18 months.

• Service spares kits contain all neces-sary spare parts for each service andtips for maintenance in Checkpoints– Inspection Kit with O-rings and

seals for separator bowl.– Overhaul Kit with parts for drive

system, belt, bearings and pads. Also contains the Inspection Kit.

– Support Kit with strategic spares to back-up the operation and maintenance.

• System Manual includes detailedinformation in electronic format orpaper copy– Operating Instructions.– Alarms & Fault Finding.– Installation Instructions.– Service & Spare Parts.

• Commissioning & technical service isavailable from all Alfa Laval offices tostart-up the system and to adviseabout operation & maintenance.

• Training in all aspects of oil treatment,fresh water generation and cooling isobtainable.

• All services are incorporated inspecially tailored Alcare CustomerCare packages, details are availablefrom local Alfa Laval offices.

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

800-PD1en-0106

2 000 4 000 6 000 8 000 10 000 12 0000

SU 200

SU 300

SU 400

SU 500

SU 600

SU 700

SU 800

Fig. 5. Capacity Table.. l/h 380 cSt/50ºC.Based on 85% removal of 5 micron particles from laboratory tests.

Technical data

Separation Unit Size Volume WeightSU 300 1360x1050x1245 mm 1.8 m3 630 kgSU 400 1380x1050x1245 mm 1.8 m3 700 kgSU 500 1643x1440x1407 mm 3.3 m3 1060 kgSU 600 1674x1440x1407 mm 3.4 m3 1200 kgSU 700 1761x1520x1585 mm 4.2 m3 1575 kg

Main supply voltage 3-phase, 400/440/480 V up to 690 VControl voltage 1-phase, 100/110/115/230 VFrequency 50 or 60 HzControl air Min 5 bar, max 7 barOperating water pressure Min 2 bar, max 6 bar

ConformityThe mark of conformity confirms that the equipment com-plies with European Economics Area (EEA directives). TheSeparation Unit also complies with the Marine Equipmentdirective.