Alfa Laval MIB 503 Module

Alfa Laval MIB 503 Module
Alfa Laval MIB 503 Module

Alfa Laval MIB 503 Module, In marine and diesel industry, customers struggle with low- quality fuels that have high content in particles and water. Operating on such fuels reduces the efficiency and the lifetime of the engine while increases the risk of repair costs.

The Alfa Laval  MIB 503 Module is a complete separation solution from Alfa Laval that improves the reliability of the oil system and protects the main engine from serious wear and damages.

General flow chart of a separator system
General flow chart of a separator system

Alfa Laval MIB 503 Module Application
• Distillate oil
• Marine diesel oil
• Lubricating oil

Alfa Laval MIB 503 Module Benefits
• Easy to install and start up
• Easy to operate and maintain
• High separation efficiency
• Robust and reliable design
• Small footprint
• Low power consumption

Alfa Laval MIB 503 Module Design

The module is available in a gas oil and a lube oil configuration. The gas oil configuration consists of the separator, the control cabinet, the pump, the flexible hoses and the alarm sensors. All of the components are mounted in an optimally designed frame that can fit even the smallest engine rooms.

The MIB 503 separator consists of a solids-retaining bowl which can operate both as a purifier and a clarifier. Its unique drive technology is based on an electric motor mounted directly to the bowl, controlled by a frequency converter located in the control cabinet.

The pump installed on the module is a positive displacement pump with constant flow and is connected to the separator through flexible hoses.

To secure the correct operation of the separator, a pressure sensor and a level sensor are installed on the module. All functions and alarms are being handled from the control cabinet which has been designed for simplicity and ease of use In lube oil configuration, the oil must reach the right temperature before the separation process starts. To accomplish that, a heater, a three way valve and a temperature sensor are included in the module.

Scope of supply

• MIB 503 Separator
• Pump
• Flexible hoses
• Control cabinet
• Sensors
• Frame
• Three way valve (only for lube oil)
• Heater (only for lube oil)
• Wheel set
• Drip tray
• Emergency stop box
• Trolley (only for gas oil)

Working principle

In gas oil application, the fuel oil is being transferred directly from the pump to the separator. In lube oil application, a heater and a three way valve are installed between the pump and the separator. The three way valve is being used to run the oil on recirculation between the sump and the heater until the correct separation temperature is reached.

The separator starts up. When the separator reaches full speed, water is added to establish the appropriate water seal (applicable only for purifier setup). Subsequently, the pump starts up and oil is fed to the separator.

The separation process takes place within the bowl. Due to the centrifugal forces, oil, water and particles are being separated based on their specific gravity. The heavy phases,
water and particles, are moving to the periphery of the bowl while the light phase, oil, is moving towards the center of the bowl.

Water is being drained automatically to the collecting tank of the module. The separated particles need to be cleaned periodically by hand. The clean oil is being pumped by a\ paring disc out of the separator and from there to the daily service fuel tank or the lube oil sump.

A pressure sensor is installed in the oil outlet after the separator. The pressure sensor triggers an alarm during separation if the water seal interface is lost.

A level sensor is installed on the collecting tank of the module. The level sensor triggers an alarm if the separator overflows.

In lube oil configuration, a temperature sensor is installed before the separator. The sensor triggers an alarm when lube oil temperature drops below 60°C.

All the sensors are connected to the pump which will stop automatically if there is an alarm. In that case, the crew is informed by the alarm lamp in the control cabinet of the module.

Alfa Laval MIB 503 Module Dimension
Alfa Laval MIB 503 Module Dimension

Technical Data

Performance data
Feed capacities :
 – Gas oil (1,5 – 6 cSt/40°C) Max. 1250 l/h
 – Marine diesel oil (13 cSt/40°C) Max. 1000 l/h
 – Lube oil (Trunk/95°C) Max. 300 l/h
Power consumption 0,7 kW (0,93 HP)
Feed temperature Max. 95°C
Feed inlet G 3/4 inch
Clean oil outlet G 1/2 inch
Drain G 1/2 inch
Heat media inlet G 3/4 inch
Heat media outlet G 3/4 inch
Material data
Separator frame Surface coated aluminum
Separator bowl Surface coated aluminum. High-grade polymer composite
Module frame Structural steel
Gaskets and O-rings Fluorocarbon rubber (Viton®)
Weights (approximate)
Separator weight incl. bowl and motor 18 kg (39,7 lbs)
Bowl weight 4 kg (8,8 lbs)
Gas oil module weight (net/gross) 72/102 kg (159/225 lbs)
Lube oil module weight (net/gross) 82/114 kg (181/251 lbs)
Volume 0,58 m3


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