Ι−
4
Section
ΙΙΙΙΙ
: Description
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Hale FoamMaster systems can be
configured to operate with single or dual
foam concentrate tanks. Examples of the
various Hale FoamMaster system
configurations are shown in figures 1-1
through 1-6 at the end of this section.
The available Air Dual Tank (ADT) valve for
the Hale FoamMaster system is an air
operated foam tank selector valve that
provides selection of foam concentrate
dependent on fire ground operational
demands. The ADT is an integral part of the
foam pump and provides an electrical
interlock for the low tank level sensors and
concentrate injection rate. A panel
mounted selector toggle switch with
indicator lights controls foam concentrate
tank selection and shows which foam
concentrate tank is in use.
The Manual Dual Tank (MDT
ΙΙ
) selector
valve is available for the Hale FoamMaster
systems with dual tanks. The MDT
ΙΙ
is a
panel mounted manually operated selector
that provides selection of foam
concentrate dependent on fire ground
operational demands. The MDT
ΙΙ
also
provides an electrical interlock for the low
tank level sensors and concentrate injection
rate. It should be noted that the MDT
ΙΙ
is
not suitable for top mount operator panel
installations and some side operator panels
due to gravity feed requirements of foam
concentrate.
Selection of the desired foam concentrate
tank with the ADT panel mounted toggle
switch or MDT
ΙΙ
selector will automatically
change the foam concentrate injection
rate to the preset default rate for the
selected foam tank. No further operator
intervention is required.
Single tank Hale FoamMaster systems can
be configured with a Manual Single Tank
(MST) selector which provides a flush
function connection to the Hale
FoamMaster electronic controls.
The ADT, MDT
ΙΙ
and MST all provide the
check valves and connection points to
provide foam pump flushing capabilities.
Strainers available for Hale FoamMaster
systems protect the foam pump from debris
that might accumulate in the foam
concentrate tank. The standard in-line
strainer/valve assembly has a composite
non-metallic housing with stainless steel
mesh strainer element. It is provided with a
service shutoff valve, mounting bracket and
fittings for connection of either 1 inch (25
mm) ID or ¾ inch (19 mm) ID foam
concentrate suction hose. The in-line
strainer/valve assembly is suitable for use
with both Class A and Class B foam
concentrates. The in-line strainer/valve
assembly is designed for installations where
the strainer is mounted in the foam pump
suction line and IS NOT subject to flushing
water pressure.
Hale FS series strainers are panel mounted
strainers with a 500 PSIG (34 BAR) pressure
rating suitable for use where flushing water
pressure will go through the strainer. The
FS15 strainer has ¾ inch NPT connection
ports and a 1-½ inch NST cap and is suitable
for use with Class A and low viscosity Class B
foam concentrates. The FS25 strainer has 1
inch NPT connection ports and a 2-½ inch
NST cap and is suitable for use with both
Class A and Class B foam concentrates.
WATER FLOW
MODEL 3.0
MODEL 3.3
MODEL 5.0
FOAM
CONCENTRATE
(%)
0.1
0.2
0.3
0.5
1
3
6
GPM
LPM
3000 11355
1500
5678
1000
3785
600
2271
300
1136
100
379
50
189
GPM
LPM
3300 12491
1650
6245
1100
4164
660
2498
330
1249
110
416
55
208
GPM
LPM
5000 18925
2500
9463
1667
6310
1000
3785
500
1893
167
632
83
314
Table 1. Maximum Foam Solution Flows
