Operation
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Before the content in the external foam compound tank is completely
used up, close the regulating ball valve.
This prevents air from being sucked in.
Suction air leads to breakage of the water column in the portable
pump.
Replace the external foam compound storage tank with closed
regulating ball valve.
Then position the regulating ball valve again at the desired set-
ting.
The table on the portable pump and the scale on the regulating ball
valve are designed for a pump outlet pressure of ≥ 6 bar (1.5 gpm) and
a foam compound viscosity of 60 cSt.
With a higher foam compound viscosity (250 cSt) the regulating
ball valve has to be set to the next highest graduation mark to
reach the desired proportioning quantity.
The proportioning accuracy is within international standards.
If the discharge of a water/foam compound mixture is stopped at the
portable pump, the regulating ball valve and the foam induction valve
must also be closed.
Operation with external foam compound container
► The foam induction valve and regulating ball valve must be closed.
► Connect suction and pressure hoses to the portable pump.
► Provide pressure hoses with suitable nozzles.
► Operate portable pump as described in the corresponding chapters.
• "External drafting/priming".
► Connect foam compound suction hose to the Foam external drafting
connector and put free end into the foam compound tank.
► Adjust pump pressure to at least 6 bar (1.5 gpm).
Refer to chapter "Adjust water pump pressure".
► Open pressure outlets.
Refer to chapter "Open/close discharge pipes".
► Open foam induction valve.
►Set regulating ball valve according to water discharge quantity desired.
If the water discharge changes during the operation the regulating
ball valve must be adjusted to the conditions.
A water/foam compound mixture is discharged from the portable pump
with the set proportioning ratio.
The system is to be flushed after every foam operation. Refer to chapter
"Flush".
Finish operation with external foam compound container
►Close regulating ball valve.
►Close foam induction valve.
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