For fixed type systems, how long should the recirculation process take?

In fixed type systems, the recirculation process is an important step to ensure that fuel quality is maintained during storage and transfer. This process typically requires longer than the actual fueling time for vehicles because it involves circulating fuel through the system to mix and prevent stratification, as well as to ensure that any contaminants are adequately filtered out.

The recirculation duration being set to twice the amount of time used for fueling vehicles reflects the need for thorough circulation. This extended period allows for the fuel to be properly conditioned and ensures that the stability and quality of the fuel remain optimal, which is critical for safety and equipment performance.

This is particularly important in systems where fuel may settle and separate over time. The increased recirculation time permits effective integration of additives and helps maintain a consistent fuel temperature and quality throughout the system. By adhering to this guideline, operators can avoid potential issues that could arise from improperly circulated fuel.