Aspirating nozzles are mainly used to achieve what effect?

Aspirating nozzles are specifically designed to produce the greatest expansion of foam. This is achieved by introducing air into the foam solution as it is discharged, allowing for the formation of a larger volume of foam with a lower density. The expansion process is crucial when dealing with flammable liquids and fire suppression, as the foam can help blanket the surface, smothering the fire and preventing re-ignition by cutting off the oxygen supply.

The efficient production of foam with aspirating nozzles ensures better coverage and effectiveness in various firefighting scenarios, particularly in environments where foam is utilized as a primary suppression agent. This capability distinguishes aspirating nozzles from other types that may focus on different parameters such as pressure or water usage, which are not the main function of aspirating nozzles.