Which type of nozzle is commonly found in typical heating boiler fuel oil systems?

In typical heating boiler fuel oil systems, the most common type of nozzle is the fixed capacity nozzle. This type of nozzle is designed to provide a specific flow rate of fuel oil, allowing for a consistent and reliable delivery of fuel to the burner. The fixed capacity design ensures that the fuel is atomized appropriately for efficient combustion, which is critical in heating applications where maintaining a certain temperature and efficiency is necessary.

Additionally, fixed capacity nozzles are advantageous in their simplicity and reliability. They do not require complex adjustments or variable settings, making installation and maintenance easier for operators. The fixed capacity allows for predictable performance, which is essential for achieving the desired heating output in a boiler system.

In contrast, while other types of nozzles, such as variable capacity or dual capacity nozzles, may offer flexibility in controlling flow rates for different operational conditions, they are less commonly used in standard heating oil systems due to their complexity and higher costs.