Auxiliary / donkey boilers
Auxiliary boilers, often referred to as donkey boilers, are essential for maintaining vessel operations when the main propulsion system is not supplying sufficient heat. These systems are critical during port stays, cargo handling and low-load operation.
At Global Boiler Services, we support auxiliary boiler systems worldwide, ensuring reliable operation and minimal downtime.
Role of auxiliary boilers onboard
Auxiliary boilers are used to supply steam for:
- Fuel and tank heating
- Cargo operations
- Domestic and hotel services
- Engine room systems
Unlike main boilers, auxiliary boilers are characterised by frequent start-stop operation, which places additional stress on components.
Operational challenges
Due to their operating profile, auxiliary boilers are exposed to:
- Thermal stress from repeated start-stop cycles
- Increased burner wear
- Soot accumulation from unstable combustion
- Control system instability at low load
These factors can lead to reduced efficiency and increased risk of failure if not properly maintained.
How Global Boiler Services supports
We provide specialised service for auxiliary boiler systems, including:
- Inspection and condition assessment
- Burner service and optimisation
- Boiler repair and pressure part maintenance
- Automation troubleshooting and upgrades
- Spare parts supply and installation
Our riding crews can assist onboard to minimise downtime and ensure continuous operation.
Minimising downtime in port operations
Auxiliary boilers are often critical during port stays, where downtime can directly impact operations.
We focus on:
- Fast response
- Efficient repair
- Preventive maintenance
Ensuring that your boiler is ready when needed.
