GENERAL
2-12 / Husky 3 Foam System
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2-2.3b In-line Water Check Valve
Figure 2-15: In-line Water Check Valve
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The In-line Water Check Valve prevents foam from entering the water pump and the remainder of the water system.
It is installed in the water piping, before the foam injection manifold and the water flowmeter.
2-2.3c Water Flowmeter
Figure 2-16: Water Flowmeter
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The Water Flowmeter measures the flow of water supplied to the foam/water discharges before foam is injected.
This controls the amount of foam that is injected when the Husky 3 foam system is turned on.
2-2.4 Control System
The control head directs a microprocessor, which receives input from the system’s water flowmeter while also
monitoring the position of the foam concentrate pump. The microprocessor compares the values of the water flow
versus the position/rate of the foam pump, to ensure the proportion rate is accurate.