What distinguishes medium expansion foam from other types?

Medium expansion foam is distinguished from other types of foam primarily by its method of production, which involves the use of an aerating nozzle. This type of nozzle is designed to mix air with the foam concentrate and water in a way that creates a more significant expansion of foam, resulting in a product that has a specific density and expansion ratio.

The aerating nozzle allows for the foam to expand moderately, creating bubbles that are larger than those produced by low expansion foam but smaller than those created by high expansion foam. This characteristic makes medium expansion foam effective for certain firefighting situations, especially in areas where a balance between coverage and extinguishing power is needed.

In contrast, other methods of foam production, such as using a standard fog nozzle, would not achieve the same results in terms of bubble size or expansion and typically do not facilitate the unique advantages that medium expansion foam provides, particularly in various fire scenarios.