FS15-60-120 Rev0204
3
INTRODUCTION
Overview
The
AutoFoam
is an around-the-pump foam proportioning metering system. It
will automatically maintain a selected foam percent mixture regardless of water flow
fluctuations. The
AutoFoam
is microprocessor controlled and is automatic in operation.
The
AutoFoam
has easy to use controls and indicators. It becomes operational at
the push of a single button. Push buttons select the foam proportioning percent. An
upper multifunction display shows the selected foam %, foam flow, and the total gallons
of foam used. A lower multifunction display shows the discharge flow rate and the
total gallons of water used. The operator can override automatic control by using the
manual override buttons to open or close the foam metering valve.
Around-the-pump proportioning systems operate with an eductor installed
between the water pump intake and pump discharge. A small flow of water from the
pump discharge passes through the eductor and creates a vacuum that draws foam
concentrate into the eductor.
The principle behind the
AutoFoam
system is straight forward. The flow rate on
the discharge side of the pump is measured. A metering valve is opened to allow foam
concentrate to flow and this flow rate is measured. The program compares the flow
rates and adjusts the metering valve to provide the correct amount of foam concentrate.
The foam concentrate is injected into the intake side of the pump by a venturi eductor
and mixed with water. This produces the correct foam proportioning percent at the
pump discharge. The
AutoFoam
constantly monitors foam and water flow and adjusts
the metering valve to ensure proper foam proportioning.
Features
Complete Automatic Foam Proportioning
Push Button Control
Flow Totaling for Both Foam and Water
Powers-Up at the Previous Proportioning Percent
Manual Override
Multiple Discharge Sensors (Optional)
