ΙΙ
-18
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
ΙΙ
ΙΙΙΙ
ΙΙ
ΙΙ
: Installation
that allows gravity feed from the foam
tank to the strainer inlet and from the
strainer outlet to the foam pump suction
connection.
NOTE:
When selecting the strainer
location make sure there is sufficient
space below the strainer for removal of
the strainer basket and screen for
cleaning. A minimum of 5 inches (127
mm) is required for this purpose. Also
make sure there is at least 2 inches (51
mm) above the strainer assembly to
permit operation of the service valve.
(Refer to figure 2-12)
2. Refer to the diagram in figure 2-13 and
mark 4 holes for mounting the foam
strainer bracket. The holes must be
drilled to accommodate ¼-20 UNC
screws. The holes can either be tapped
(#7 drill for ¼-20 UNC tap) or drill large
enough to use screws, nuts and washers
(9/32 inch (7 mm) diameter) to secure
the bracket to the apparatus. Secure
the bracket and strainer/valve assembly
to the apparatus.
3. Select the appropriate fittings from the
bag attached to the strainer assembly.
Two of each fitting are included with the
strainer assembly.
When using class A or low viscosity class
B foam concentrates use the 1 inch NPT
x ¾ inch NPT bushings and the ¾ inch
NPT x ¾ inch hose fittings in each end of
the strainer/valve assembly.
Class B foam concentrates generally
require the use of the 1 inch NPT x 1 inch
hose fittings.
Before assembly coat all fitting threads
with Permatex #80724 (or equal) plastic
pipe thread sealant. Install the fittings
into the strainer/valve assembly ends
and tighten securely.
4. Install the clear plastic hose from the
foam tank outlet to the inlet of the
strainer/valve assembly. The inlet of the
strainer/valve assembly is on the valve
end. Wetting the ends of the hose and
fittings will help ease installation on the
hose fittings.
CAUTION:
Make sure the foam tank and
foam concentrate suction hoses are
clean before making final connection to
foam pump. If necessary flush tank and
hoses prior to making connection.
5. Install the clear plastic hose from the in-
line strainer/valve assembly outlet to the
inlet of the Hale MDT
ΙΙ
, Hale MST or
foam concentrate pump.
FS SERIES STRAINER
When a pressurized water flush is provided
to the strainer from one of the discharges
the use of Hale FS series strainers is required.
The plumbing exposed to the flush water
pressure must be rated at or above the
operating pressure of all other discharge
plumbing components. [500 PSI (34 BAR)
minimum]
The following procedures are provided for
installation of FS series strainers:
1. Choose a location on the apparatus
that allows gravity feed from the foam
tank to the strainer inlet and from the
strainer outlet to the foam pump suction
connection.
NOTE:
When selecting the strainer
location make sure there is sufficient
space behind the pump panel to permit
attaching hoses and fittings. Make sure
Figure 2-14. FS Series Strainer Orientation
LOOKING FROM BACK OF STRAINER
