What device is used to create pressure in low-energy foam systems?

The use of a fire pump is critical in low-energy foam systems as it plays a vital role in creating the necessary pressure for effective foam application. Fire pumps are designed to move water at significant pressures, which is essential for various firefighting operations, including the use of foam. In low-energy foam systems, creating proper pressure enables the foam solution to be drawn from the tank and mixed effectively before being discharged. This ensures that the foam can blanket the fuel surface adequately, suppressing fire effectively and preventing reignition.

While other devices mentioned may serve important functions in firefighting operations, they do not specifically create the pressure required for low-energy foam systems. A fire tank stores water and foam concentrate, a foam proportioner mixes foam concentrate with water but does not generate the pressure itself, and a positive displacement valve controls fluid flow but is not responsible for generating the pressure necessary for foam application. Each of these components plays a role in the overall system, but the fire pump is central to ensuring the foam is delivered with the correct pressure for optimal performance.