The flow rate stamped on a nozzle is based on which pump pressure?

The flow rate stamped on a nozzle is determined based on a specific pump pressure, which ensures that the nozzle operates under standardized conditions for accurate performance measurements. In the case of oil burners, the standard pump pressure for which nozzle flow rates are typically calibrated is 100 PSI.

This standardization is essential because it allows users to reliably predict the performance of the burner, ensuring that it operates efficiently and effectively under anticipated conditions. When a nozzle is rated at a particular flow rate, that rating corresponds directly to the 100 PSI pressure; as such, if the pressure varies significantly from this standard, the actual flow rate may differ from the stamped rating. Thus, understanding this relationship is crucial for anyone working with oil heating systems, as it influences combustion efficiency and the overall operation of the heating system.