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©HALE PRODUCTS, INC. Our policy is one of continuous development. We therefore
reserve the right to amend specifications without notice or obligation.
SYSTEM OVERVIEW
The SmartCAFS is a Compressed Air Foam System comprising of two major components (in addition
to the main water pump) – Air compressor system (with separate heat exchanger and oil/water
separator) and Foam unit system (foam proportioning unit).
The Foam unit foam pump and motor assembly is mounted separately from the water pump and is
designed to be remotely mounted according to the
A metered amount of foam concentrate is introduced into the manifold and mixed with water from the
pump discharge manifold to produce a solution. The foam and water solution is then fed to a control
valve (ARC) where wet or dry foam may be selected (air ratio control section of manifold). Compressed
air is then injected and the resulting foam / water / air combination is completely mixed by the X-mixers
inside the discharge manifold creating CAFS discharge flow.
SAFETY INTERLOCKS ARE PROVIDED TO ENSURE THAT:
1. Foam concentrate cannot be introduced unless water is flowing through the unit. Compressed
air cannot be introduced unless foam concentrate is flowing.
2. ‘Slugging’ (unmixed air and water) in the discharge line is prevented. Air cannot be injected in
the absence of foam and water.
3. Air injection when the foam tank is empty is prevented. Foam tank low level switches are
provided and MUST be fitted.
COMPRESSOR
The rotary twin-screw compressor is rated at 210 SCFM [5946 l/min] @ 125 PSI [8.6 Bar] per NFPA
and is driven by a synchronous belt. The compressor is engaged, or disengaged from the pump drive
at idle, via an air-operated, oil lubricated friction plate clutch.
OIL COOLER
Compressor lubricating oil is cooled by water taken from the main pump, via the water supply line;
cooling water being supplied from pump delivery and returned to truck tank. The compressor will reject
up to 43HP [32.0 kW] of heat energy to cooling. The installer must consider this additional thermal load.
When the compressor is turned off, residual system pressure is vented by a blow-down valve. The
system should not store compressed air energy when shut off.
NOTE:
The compressor should not be run without cooling water and proper oil level for both the
compressor and separator tank.
SEPARATOR TANK
The separator tank holds the oil required for lubricating the compressor and separates the oil from the
oil/air mix discharged from the compressor. The separator tank also has a minimum pressure valve
that ensures that air pressure is maintained above 43.5PSI [3 bar] to maintain correct lubrication.
Содержание HALE SmartCAFS
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