Quenchmaster CP500 RFS Rev4, 16/2/2010
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QUENCHMASTER FOAM SYSTEMS INTRODUCTION
GENERAL DESCRIPTION
The range of Quenchmaster systems are designed to dispense both Class ‘A’ and Class ‘B’
foams.
The foam system is connected to the fire fighting pump and includes the following:-
the proportioner, foam on/off valve(optional), a ‘Y’ type strainer (optional) and the foam
concentrate.
Water is delivered from the Discharge side of the pump into the proportioner and metered
across a venturi, this causes a negative vacuum, foam is then drawn through the proportioner,
mixes with the water, and then returns to the pump inlet, and then the foam mixture is
delivered to the fire fighting hoses.
Proportioner:-
This device contains 2 valves to control the supply of foam concentrate to
the pump. The left hand valve selects the class of foam (Class ‘A’ or Class ‘B’) to be used.
The right hand (metering) valve selects to percentage (%) of foam to be added to the water.
Note: BFFF is Class ‘A’ foam. AFFF and ATC are Class ‘B’ foams.
