Graviner MK6 Oil Mist Detector Control Panel – Marine Engine Oil Mist Detection & Protection System

 Title

Graviner MK6 Oil Mist Detector Control Panel | Kidde Graviner MK6 OMD | Marine Engine Oil Mist Detection System

Graviner MK6 Oil Mist Detector Control Panel

The Graviner MK6 Oil Mist Detector (OMD) Control Panel, manufactured by Kidde, is one of the most trusted engine protection systems used on low-speed and medium-speed marine diesel engines. It continuously monitors oil mist concentration inside the engine crankcase and provides early warning of abnormal conditions that could lead to crankcase explosions, bearing failures, or catastrophic engine damage.

Using advanced optical sensing technology, the MK6 continuously communicates with multiple detector heads installed on each crankcase compartment. If oil mist concentration exceeds the preset safety threshold, the control panel immediately generates visual and audible alarms and can initiate engine slowdown or shutdown depending on the vessel's protection logic.

SM MARINE SERVICE™ supplies New, Reconditioned, and Fully Tested Graviner MK6 Oil Mist Detector Systems, including control panels, detector heads, sampling pipes, interface modules, power supplies, PCBs, display units, spare parts, repair services, calibration, and worldwide technical support.

Manufacturer

Kidde Fire Protection (Graviner Marine Systems)

Country of Origin

United Kingdom

Product Type

Marine Oil Mist Detector (OMD) Control Panel

Marine Applications

• Low-Speed Marine Diesel Engines
• Medium-Speed Marine Diesel Engines
• MAN B&W Main Engines
• Wärtsilä Marine Engines
• Sulzer Marine Engines
• Mitsubishi Marine Engines
• Daihatsu Marine Engines
• Yanmar Marine Engines
• Generator Engines
• Offshore Power Plants

Key Features

• Continuous crankcase oil mist monitoring
• Multi-channel engine protection
• High-accuracy optical detection
• LCD operator display
• Individual detector monitoring
• Automatic alarm generation
• Engine slowdown/shutdown interface
• Self-diagnostic functions
• Fault history indication
• Marine-approved construction
• High operational reliability
• Easy maintenance and calibration

SM MARINE SERVICE™ maintains stock of Graviner MK6 systems and spare parts for shipowners, ship managers, repair companies, and marine engineers worldwide. We provide fast supply, repair, refurbishment, calibration, troubleshooting, and technical support for marine engine safety systems.

What Is the Graviner MK6 Oil Mist Detector?

The Graviner MK6 Oil Mist Detector (OMD) is an advanced marine engine safety system designed to continuously monitor oil mist concentration inside the crankcase of diesel engines. It provides an early warning of abnormal bearing temperatures, lubrication failures, and overheating components before these conditions develop into dangerous crankcase explosions.

The MK6 receives signals from multiple optical detector heads installed around the engine crankcase. By continuously analyzing oil mist density, the control panel can immediately alert engineers and automatically activate engine slowdown or shutdown functions if unsafe conditions are detected.

This makes the Graviner MK6 one of the most important safety devices installed on modern commercial vessels.

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Main Components

• MK6 Control Panel
• Oil Mist Detector Heads
• Optical Sensor Modules
• Sampling Chambers
• Interface PCB
• Main CPU Board
• LCD Display Module
• Alarm Relay Board
• Power Supply Unit
• Communication Module
• Engine Interface Module
• Detector Connection Cables
• Alarm Indicators
• Key Switch & Operator Controls

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How the Graviner MK6 Works

The Graviner MK6 continuously monitors every protected crankcase compartment.

Operating sequence:

1. Optical detector heads continuously sample crankcase air.
2. Light scattering technology measures oil mist concentration.
3. Sensor data is transmitted to the MK6 control panel.
4. The controller compares readings against preset alarm limits.
5. If abnormal oil mist is detected, the system:
   • Identifies the affected crankcase compartment.
   • Activates audible and visual alarms.
   • Displays the alarm location on the LCD.
   • Sends alarm signals to the engine monitoring system.
   • Initiates automatic engine slowdown or shutdown if configured.

This early warning significantly reduces the risk of catastrophic crankcase explosions and expensive engine damage.

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Main Features

• Continuous oil mist monitoring
• Multi-point crankcase protection
• High-sensitivity optical detection
• Large LCD operator display
• Individual detector identification
• Automatic fault diagnosis
• Event logging
• Engine shutdown interface
• Alarm relay outputs
• Marine-approved design
• High reliability
• Easy maintenance
• Long service life

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Marine Applications

The Graviner MK6 is widely installed on:

• MAN B&W Main Engines
• Wärtsilä Marine Engines
• Sulzer Marine Engines
• Mitsubishi Marine Engines
• Daihatsu Marine Engines
• Yanmar Marine Engines
• MAK Marine Engines
• Himsen Marine Engines
• Auxiliary Diesel Generators
• Cargo Ships
• Container Vessels
• Bulk Carriers
• Oil Tankers
• LNG & LPG Carriers
• Offshore Support Vessels
• Cruise Ships
• Naval Vessels

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Common Problems

After years of operation, engineers may encounter:

• Detector head contamination
• Optical sensor failure
• False oil mist alarms
• Communication faults
• LCD display failure
• Power supply problems
• CPU board failure
• Relay output faults
• Wiring damage
• Detector address errors
• Internal PCB faults
• Moisture inside detector heads

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Troubleshooting

If the system reports an alarm or fault:

• Clean detector heads.
• Inspect optical sensors.
• Verify detector addresses.
• Check communication cables.
• Measure power supply voltage.
• Inspect alarm relays.
• Test detector response.
• Verify interface PCB operation.
• Check LCD status messages.
• Review event history.
• Inspect crankcase ventilation.
• Confirm proper engine lubrication.

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Preventive Maintenance

Recommended maintenance includes:

• Clean detector heads during scheduled overhauls.
• Inspect optical windows.
• Test all alarm channels.
• Verify detector communication.
• Tighten electrical terminals.
• Check interface boards.
• Perform functional alarm tests.
• Update configuration if required.
• Inspect power supply condition.
• Carry out annual calibration according to the manufacturer's procedures.

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Why Ships Still Use the Graviner MK6

The Graviner MK6 remains one of the industry's preferred oil mist detection systems because it provides:

• Early warning of bearing failure
• Prevention of crankcase explosions
• High measurement accuracy
• Proven marine reliability
• Compliance with classification society requirements
• Reduced engine repair costs
• Improved crew safety
• Long operational life
• Worldwide spare parts availability
• Easy maintenance and troubleshooting

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Frequently Asked Questions (FAQ)

What is the purpose of the Graviner MK6?

It continuously monitors oil mist concentration inside the engine crankcase and provides early warning of unsafe operating conditions.

Which engines use the MK6?

The system is widely used on MAN B&W, Wärtsilä, Sulzer, Mitsubishi, Daihatsu, MAK, Himsen, and other marine diesel engines.

Can the control panel be repaired?

Yes. Most faults involving the LCD display, CPU board, power supply, communication board, relay board, and operator interface can be repaired by qualified marine automation engineers.

Do you supply detector heads?

Yes. SM MARINE SERVICE™ supplies:

• Detector Heads
• Control Panels
• Display Modules
• CPU Boards
• Power Supply Units
• Relay Boards
• Interface Modules
• Communication Boards
• Optical Sensors
• Cable Assemblies
• Complete MK6 Systems

Do you provide calibration and testing?

Yes. We provide repair, calibration, refurbishment, functional testing, troubleshooting, and worldwide technical support.

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Short Product Description

The Graviner MK6 Oil Mist Detector Control Panel is a marine-approved engine safety system designed to continuously monitor crankcase oil mist concentration. By providing early warning of abnormal engine conditions and supporting automatic engine protection, the MK6 helps prevent crankcase explosions, protects valuable machinery, and ensures safe and reliable vessel operation.

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User Manual & Technical Resources

For installation, commissioning, operation, and maintenance, refer to:

• Graviner MK6 Oil Mist Detector Installation Manual
• Graviner MK6 Operation Manual
• Kidde Graviner MK6 Maintenance Manual
• Marine Engine Crankcase Protection Guide
• Classification Society Requirements for Oil Mist Detection
• Engine Manufacturer Oil Mist Detection Documentation

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Why Choose SM MARINE SERVICE™

SM MARINE SERVICE™ is a trusted global supplier of marine automation systems, engine safety equipment, navigation electronics, fire detection systems, hydraulic equipment, and genuine marine spare parts.

We provide:

• New Marine Equipment
• Reconditioned Marine Equipment
• Fully Tested Equipment
• Genuine Quality Spare Parts
• Repair & Refurbishment
• Calibration Services
• Technical Support
• Worldwide Shipping
• Emergency Marine Supply
• Competitive Pricing

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SM MARINE SERVICE™

Bangladesh Office:
Samir Market, DT Road, Pahartali, Beside CDA Market, Chattogram, Bangladesh

China Warehouse & Support Center:
Shanghai, China

Products & Services

• New Marine Equipment
• Reconditioned Marine Equipment
• Marine Spare Parts
• Worldwide Supply
• Sourcing
• Repair
• Calibration
• Technical Support

Website: www.smmarineservice.com

Email: info@smmarineservice.com

WhatsApp: +8801818929292

Marketing Contact: Nazmul Hasan Bhuiya

 

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