What device regulates the flow of foam concentrate into an eductor?

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Multiple Choice

What device regulates the flow of foam concentrate into an eductor?

Explanation:
The device that regulates the foam concentrate flow into an eductor is the proportioner. It meters the concentrate into the water stream to achieve the correct foam solution ratio, ensuring consistent foam quality as water flow changes. The eductor relies on the venturi effect to draw concentrate, so having a proportioner in the line keeps the mixture at the specified percentage (for example, 1% or 3%), regardless of pump or nozzle pressure. A throttle valve would mainly control water flow, not the concentrate ratio; an activation switch simply starts the system; a generic metering device is less specific to foam systems.

The device that regulates the foam concentrate flow into an eductor is the proportioner. It meters the concentrate into the water stream to achieve the correct foam solution ratio, ensuring consistent foam quality as water flow changes. The eductor relies on the venturi effect to draw concentrate, so having a proportioner in the line keeps the mixture at the specified percentage (for example, 1% or 3%), regardless of pump or nozzle pressure. A throttle valve would mainly control water flow, not the concentrate ratio; an activation switch simply starts the system; a generic metering device is less specific to foam systems.

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