ApplicationPurification or clarification of distillates, marine diesel oils,intermediate and heavy fuel oils, and lubricating oils used inmarine installations and power stations.

The MOPX separation system (Fig. 1) is designed for auto-matic intermittent discharge of separated sludge.

ConceptEach MOPX Separation System (Fig. 2) comprises:

• an MOPX separator• ancillary equipment including EPC-41 control unit.

The separator can be delivered with or without built-on feedpump. An installation with a separate feed pump is recom-mended.

Features and benefitsThe main features of the system are:

• Simple and robust design.

• EPC-41 electronic control unit with built-in PI temperaturecontroller for any type of steam heater or Heatpac electricoil preheater.

The major benefits are:

• Flexibility. The self-cleaning bowl may be used either as a purifier or a clarifier.

• Simple installation, operation and maintenanceas a result of few and simple components.

• Preventive maintenance program for improved operational safety and cost control with standardized service kits.

MOPXSeparation Systems

Recirc.

Oil

EPC-41

MOPX

Cleanoil

Water

Sludge

Fig. 2. Basic system concept.

Fig. 1. MOPX separator system.

Fig. 3. Purifier–Clarifier.

1 Oil inlet2 Oil outlet3 Sludge outlet4 Make-up and closing water inlet5 Opening water inlet6 Inlet for water seal and displacement

water

7 Water outlet8 Water/oil interface9a Gravity disc9b Clarifier disc

10 Disc stack11 Top disc

System working principleThe MOPX Separation System isoperated automatically by the EPC-41 control unit, except for starting the sep-arator.

The MOPX separator bowl can bearranged as a purifier or as a clarifier. A purifier separates sludge and waterfrom the oil. Water is continuously dis-charged from the bowl. The sludgeaccumulated in the sludge space inboth a purifier and a clarifier is inter-mittently discharged. In a clarifier, thewater outlet is blocked i.e. the waterhandling capability is limited.

In the purifier mode, the EPC-41 unitautomatically controls the water admit-ted to the separator for the water sealand displacement of oil prior to sludgedischarge. During normal operation vitalprocess parameters are monitored. TheEPC-41 unit provides alarm functionsfor broken water seal, low oil pressure,high back pressure and power failure.Alarm functions are also provided forerrors involving the EPC-41 unit.

In addition, functions are available forhigh/low oil temperature alarm whenthe optional Pt 100 temperature sensoris fitted, and for vibration alarm whenthe optional vibration switch is fitted.

When operating in the purifier mode, asuitable gravity disc must be fitted toobtain the correct interface position inthe separator bowl, i.e. the boundarybetween the oil and the water seal. Thesize of gravity disc must be selected tomatch the oil density, viscosity/temper-ature and oil feed rate to the separator.In the clarifier mode, a clarifier disc isfitted instead of gravity disc.

MOPX purifier MOPX clarifier

InstallationThe MOPX Separation System is de-signed for automatic operation in peri-odically unmanned engine rooms at seaand automated power stations ashore.

Each MOPX separator is equipped withits own EPC-41 unit and ancillary equip-ment, forming an independent system.MOPX Separation Systems may beoperated in single, in parallel or in series.

For cleaning of distillate, marine dieseloil, and lubricating oil, MOPX SeparationSystems should be operated in singleor parallel configuration, depending onprevailing operational conditions. Theseparators must then always be oper-ated as purifiers.

If more than one MOPX SeparationSystem is installed in a plant for thecleaning of intermediate or heavy fuel

oil, the systems should be operated inseries. In such a case, the first sepa-rator should be operated as a purifier,followed by the second separator oper-ated as a clarifier.

Up to three separation systems in thesame cleaning plant can be intercon-nected between their EPC-41 controlunits; e.g. a purifier, a clarifier and astandby separation system.

Basic system equipment (See Fig. 4)1 MOPX separator with or without

built-on feed pump2 Solenoid valve block, water3 Emergency stop pushbutton4 EPC-41 control unit5 Solenoid valve block, air6 Flexible hoses7 High pressure switch8 Low pressure switch9 Pressure gauge

10 Regulating valve11 Pneumatic 3-way valve

Selected spare parts for separator andsystem equipment.

Additional equipment necessary for operationElectric motor and starterSet of toolsOperating water tankSeparate oil feed pump with strainerand starter (for separators without built-on pump)Oil heating system

Optional equipmentVibration switchTemperature sensor PT-100MCFR flow regulation systemAir pressure reducing valve

Fig. 4. Schematic installation layout of an MOPX separation system.

4

26

11

109

8

7

1

3

5

Hot freshwater

Freshwater

Operatingwater tank

Waterdrain

Sludgeoutlet

Separated wateroutlet

Pre-heater

Oilfeedpump

Oilrecirculation

Oilinlet

Clean oil

Compressedair

Heaterpower unit

Drain

Flexiblehoses

Starter

ModulesThe separation system with supplemen-tary equipment can be delivered as astandardized plug-in unit, suitable forboth marine and power installations.

Technical documentationComplete information and documen-tation accompany each separationsystem. Complete System Manualcovering separator and ancillary equipment.

After Sales supportA Preventive Maintenance Program has been developed, with two differentspare parts kits available correspondingto two levels of service: every threemonths, and every year of operation.The kits can be ordered and stockedas single units.

For further details of the PreventiveMaintenance Program contact yournearest Alfa Laval representative. Ourservice engineers are available to assistyou for any level of maintenance and totrain your maintenance engineers.

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

160-PD1en-0108

Model

MOPX 205

MOPX 207

MOPX 309

MOPX 310

0 10000 20000l/h

Throughput CapacitiesBlue bars indicate range from maximum recommended capacity on600 cSt/50°C heavy fuel oil to maxrecommended capacity on distillate (1.5 to 6 cSt/40°C). For detailed information on throughput capacitiessee separate capacity table for indi-vidual model.

MOPX 205 Weight: net 400 kg gross 530 kg Volume 1.55 m3

MOPX 207 ” ” 785 kg ” 950 kg ” 2.25 m3

MOPX 309/310 ” ” 1060 kg ” 1330 kg ” 3.88 m3

Shipping data