What are the two types of low energy foam proportioning systems commonly installed?

The two types of low energy foam proportioning systems commonly installed are direct injection and balance pressure systems. Direct injection systems allow for foam concentrate to be injected into the water stream as it moves through the pumping system. This method ensures a precise mixture of foam and water, optimizing the foam's effectiveness when applied to suppress fires.

Direct injection systems benefit from being simple to operate and requiring less maintenance compared to other systems. This system is particularly useful in ARFF operations because it can provide a quick and effective response to fires involving flammable liquids.

While balance pressure systems are also widely used, direct injection is a standout choice due to its efficiency in ensuring a consistent foam quality right at the point of use.