
ΙΙ
-38
ROTARY GEAR PUMP
ELECTRONIC FOAM PROPORTIONING SYSTEM
Section
ΙΙ
ΙΙΙΙ
ΙΙ
ΙΙ
: Installation
Figure 2-30. Top Mount Low Tank Switch
Assembly Component Identification
STRAIN
RELIEF
STRAIN RELIEF
GLAND NUT
FLANGE AND
GASKET
SENSOR
¼ NPT X
1
/
8
FNPT
BUSHING
¼ FNPT X ½ TUBE
FITTING
½ TUBE X
5
/
8
TUBE UNION
3
/
8
FNPT X
5
/
8
TUBE
FITTING
5
/
8
INCH O.D.
STAINLESS TUBE
½ INCH O.D.
STAINLESS TUBE
SENSOR
WIRE
bottom of the tank. When properly
installed the center of the sensor float
should be 1-½ to 2 inches (38 to 51 mm)
above the bottom of the foam tank.
c. Slide the flange to the top of the 5/8
inch diameter tube and adjust the
telescoping section until the desired
length is achieved as measured from
the bottom of the flange to the bottom
of the sensor. Tighten the compression
fittings on the union to lock length.
NOTE:
If telescoping section will not get
short enough it can be disassembled
and cut. Take care to deburr the ends
of the tubes after they are cut. Cut an
equal amount from each section of
tubing.
IMPORTANT:
Use the following
procedure only if the tube sections are
too long otherwise proceed to step d.
Refer to figure 2-30, disassemble and cut
the tube sections as follows:
1) Loosen and remove the
3
/
8
FNPT x
5
/
8
tube fitting and strain relief from the
top of the sensor assembly. Carefully
slide the sensor wire out of the strain
relief gland.
2) Loosen and remove the ¼ FNPT x
½ tube fitting and sensor from the
bottom of the sensor assembly. DO NOT
remove the ½ inch tube from the
5
/
8
inch
tube.
3) Using a tubing cutter, remove the
required length of tube from the end of
each tube. Deburr the cuts when
complete.
4) Install a new ½ compression
ferrule on the end of the tube. Carefully
thread the sensor wire through the tube
assembly and attach the ¼ FNPT x ½
Figure 2-29. Top Mount Low Tank Switch
Mounting Flange Cutout Dimensions
1.44 in.
(37 mm)
0.72 in.
(18 mm)
(4) Thru Holes
0.281 in. (7 mm)
1.31 in.
(33 mm)
Dia. Thru
Hole
0.72 in.
(18 mm)
1.44 in.
(37 mm)
MINIMUM LENGTH
WITHOUT CUTTING TUBE
SECTIONS 31-½ INCHES
(800 MM)