Kidde Graviner MK5 Oil Mist Detector System
The Kidde Graviner MK5 Oil Mist Detector System is a crankcase protection system designed to continuously monitor oil mist concentrations within diesel engine crankcases.
Kidde Graviner MK5 Oil Mist Detector System
Key Features
- Continuous monitoring of oil mist density within engine crankcases.
- Early warning of abnormal engine conditions and bearing failures.
- Optical oil mist detection technology for accurate measurement of oil mist concentration.
- Visual and audible alarm functions when preset alarm thresholds are exceeded.
- Sampling system using air valves, hoses, and air chambers to monitor multiple crankcase locations.
- Widely installed on marine diesel engines and industrial power generation equipment.
Operating Principle
The MK5 continuously samples air from engine crankcases and passes the sample through an optical measuring chamber. Oil mist particles scatter light within the detector, allowing the system to determine the oil mist concentration. When the measured value exceeds the preset alarm threshold, the MK5 activates alarm outputs to alert operating personnel to potentially dangerous conditions.
System Components
Typical MK5 systems consist of:
- Control Unit
- Display Unit
- Sampling Valves
- Air Chamber
- Photocell Assembly
- Lamp Assembly
- Air Filter and Pressure Regulator
- Sampling and Exhaust Hoses
- Alarm and Relay Outputs
These components work together to provide reliable monitoring and protection of diesel engine crankcases.
Support and Spare Parts
As the MK5 is a legacy product, availability of original spare parts is limited. Many operators therefore rely on reconditioned MK5 systems and refurbished replacement components to maintain existing installations. This provides a practical solution where upgrading to a newer MK6 or MK7 system is not immediately required.
System Specifications
| Parameter | Specification |
|---|---|
| System Type | Oil Mist Detection System (OMD) |
| Detection Method | Optical light-scatter measurement |
| Application | Diesel engine crankcase monitoring |
| Sampling Method | Sequential air sampling from crankcase spaces |
| Alarm Function | Visual and audible alarm on high oil mist density |
| Protection Purpose | Early warning of bearing failure and crankcase explosion risk |
| Installation | Marine and industrial diesel engines |
| Monitoring | Multiple crankcase compartments via sampling system |
Detection Performance
| Parameter | Specification |
|---|---|
| Oil Mist Particle Size | Approximately 0.5 to 5 microns |
| Minimum Detectable Oil Mist Density | Approximately 0.05 mg/litre |
| Explosive Oil Mist Range | Typically 30 to 50 mg/litre depending on oil type |
| Measurement Principle | Light scattering by suspended oil particles |
Electrical Components
| Component | Part Number |
|---|---|
| Main PCB | 53569-110 |
| Display Unit | 28781-002 |
| Power Supply Assembly | 45626-113 |
| Solid State Relay | 27480-K008 |
| Relay MK5 | 27489-073 |
| Programmable IC4 | P52100 |
| Power Supply Select Card | 39832-704 |
Pneumatic Components
| Component | Part Number |
|---|---|
| Pressure Regulator & Filter Assembly | 24124-201 |
| Air Filter Element | 24124-202 |
| Pressure Switch | 45625-131 |
| Air Valve Assembly | 45625-130 |
| Sample Valve Assembly | 45625-155 |
| Pressure Gauge | B4112-002 |
Downloads for Kidde Graviner MK5 Oil Mist Detector System.
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