ΙΙ
-17
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
ΙΙ
ΙΙΙΙ
ΙΙ
ΙΙ
: Installation
clean before making final connection to
foam pump. If necessary flush tank and
hoses prior to making connection.
FOAM STRAINER
IN-LINE STRAINER/VALVE ASSEMBLY
CAUTION:
The in-line strainer/valve
assembly is a low pressure device and
WILL NOT withstand flushing water
pressure. When installing the in-line
strainer in systems equipped with Hale
MDT
ΙΙ
or Hale MST make sure the in-line
strainer/valve assembly is in the hose on
the inlet side of the valve. If the strainer
will be subject to flushing water pressure,
use Hale FS series strainers.
The in-line strainer/valve assembly has 1
inch NPT female threaded ports. Fittings are
supplied for connection of ¾ inch (19 mm)
or 1 inch (25 mm) inside diameter hose
depending on the viscosity of foam
concentrates used. (See figure 2-12)
Generally ¾ inch inside diameter hose will
be used for Class A foam and 1 inch inside
diameter hose will be used for Class B
foams. A bracket is included with the in-line
strainer/valve assembly to permit installation
on the apparatus.
The hose from the foam tank(s) to the
strainer should have adequate wall stiffness
to withstand the vacuum of the foam pump
while it is operating [23 inches (584 mm) Hg
and 50 PSI (3 BAR)] (Kuriyama, Kuri-tec K-
7130 series or equal).
The following procedures are provided for
installation of the in-line strainer/valve
assembly:
1. Choose a location on the apparatus
Figure 2-13. In-Line Strainer Mounting
Bracket Hole Layout Dimensions
STRAINER BRACKET OUTLINE
SHOWN FOR CLARITY
3-1/8 IN.
(79 MM)
2-2132 IN.
(67 MM)
4 HOLES (#7 DRILL
IF TAPPED ¼-20
UNC or 9/32 IN (7
MM) DIAMETER
Figure 2-12. In-Line Strainer/Valve Installation
¾ INCH NPT X ¾ INCH HOSE
FITTING
(Use on each end for Class A
foam concentrates)
1 INCH NPT X ¾ INCH NPT
BUSHING
(Use on each end for Class A
foam concentrates)
1 INCH NPT X 1 INCH HOSE
FITTING
(Use on each end for Class
B foam concentrates)
2 INCHES (51 mm) MINIMUM
CLEARANCE ABOVE FOR
VALVE OPERATION
STRAINER SERVICE
VALVE
(Shown in open
position. Rotate 90
o
clockwise to close)
STRAINER
MOUNTING
BRACKET
5 INCHES (127 mm) MINIMUM
CLEARANCE BELOW FOR
ELEMENT MAINTENANCE
FOAM
CONCENTRATE
INLET
FOAM
CONCENTRATE
OUTLET
