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Firemiks AB
Instruction manual version: SPFA FM
P.O. Box 8155, 104 20 STOCKHOLM, Sweden
phone +46-8-551 196 10 - [email protected] - www.firemiks.com
4.4 Concentrates:
4.4.1 The FIREMIKS can be used with all common foam liquids/fire-fighting
additives as long as they remain within the approved viscosity range (see
data sheet). As for example standard detergents, synthetic AFFF, AFFF-AR
and protein based FP, FFFP and FFFP-AR. Note: Minimum water flow rate
with correct dosing varies with viscosity properties of the concentrate and
system pressure. Higher viscosity and higher system pressure reduces
dosing performance, both resulting in an increased minimum flow. Should
there be any questions and thoughts about different additives, please contact
Firemiks AB and state additive type and brand. Usually it is possible to make
a factory acceptance test with the specific concentrate to be used, if the
concentrate is made available.
4.4.2 For concentrates with very high viscosities, we recommend the GP (Gear
Pump) type FIREMIKS. This type of pump does have a higher min flow. For
this pump type, performance improves with higher viscosity. At the time of this
writing, these are not FM Approved.
4.4.3 This FIREMIKS type is NOT suitable for Gel Forming additives. Contact your
distributor or Firemiks AB for a special version of the FIREMIKS that can
handle these additives.
4.5 Concentrate delivery to the unit
4.5.1
The supply of concentrate to the FIREMIKS unit must be done with
gravity feed.
Gravity feed means that the lowest possible concentrate level in
the tank is higher than the inlet of the concentrate pump(s) on the FIREMIKS
in such a way that it delivers the required concentrate flow to the pump inlet
by gravity alone under all operating conditions. That is, without relying on
suction from the pump. Inlet pressure must always be at least equal or larger
than atmospheric pressure. Gravity feed thus always overcomes the friction
losses of the concentrate delivery piping/hoses to the FIREMIKS unit.
4.5.2 Gravity feed is a requirement; however, the concentrate pump usually can
suck up to half a meter below the inlet without problem. Nevertheless, this is
not to be relied upon and this suction scenario is not covered by warranty.
4.5.3 Maximum pump inlet pressure must be lower than system pressure at all
times (stationary and running) and at the most 3bar.
4.5.3.1 For dry systems without water pressure on stand-by, the highest tank level
should not be higher than 2m above the concentrate pump inlet, otherwise
the concentrate can leak into the system.
4.5.4 The concentrate is assumed to be stored in an atmospheric tank that supplies
the FIREMIKS.
4.5.5 Design of the gravity feed line
Always aim to have as short and easy flowing foam concentrate
feed to the FIREMIKS as possible as it is critical for reliable
performance of the FIREMIKS.
