5
D
FLUID FLOW
D= PIPE DIAMETER
1" PIPE
CONNECTION
5 x D
MINIMUM
5 x D
MINIMUM
a.
The flow switch must be installed in the pipe using
a threaded tee connection or welding fitting of
minimum length such as a half coupling. Use a
face or hex bushing to reduce the tee outlet to 1"
pipe thread if a reduced tee outlet thread size fitting
is not available.
1
" MAX
(25mm)
Paddle Arm
b.
When installing brazed/soldered copper pipe,
size the threaded adapter to ensure the paddle
arm extends into the main run of the pipe.
• The flow switch
should be located in a horizontal
section of pipe
where there is a straight horizontal
run of at least 5 pipe diameters on each side of the
flow switch. The flow switch may be installed in a
vertical pipe if the flow is in the upward direction.
• The flow switch
must be installed in the upright
position
as shown with arrow mark on side of casting
in the same direction as fluid will flow.
• Some system conditions that require more than 5 pipe
diameters are high viscosity fluid and high fluid velocity.
• The flow switch must be installed in the pump suction
piping when spring-loaded check valves and/or other
close coupled accessories are installed in the pump
discharge piping.
1" (25mm)
1"
(25mm)
1"
(25mm)
1" (25mm)
2
"
(50mm)
1
1
/
4
"
(32mm)
1
1
/
2
"
(40mm)
1
1
/
4
"
(32mm)
2
"
(50mm)
1
1
/
2
"
(40mm)
FACE OR HEX.
BUSHING
2
" (50mm)
3
"
(80mm)
2
" (50mm)
3
"
(80mm)
1
1
/
4
" (32mm)
1
1
/
4
" (32mm)
1
1
/
2
" (40mm)
1
1
/
2
" (40mm)
2
1
/
2
"
(65mm) 2
1
/
2
"
(65mm)
2
" (50mm)
3
" (80mm)
1
" MAX
(25mm)
1
" (25mm)
4
" (100mm)
6
" (150mm)
2
" (50mm)
3
" (80mm)
4
"
(100mm)
6
"
(150mm)
2
1
/
2
"
(65mm)
2
1
/
2
" (65mm)
Threaded
Pipe
Threaded
Pipe
CORRECT
INCORRECT
Threaded
Pipe
Welded
Pipe
STEP 2 - Determine the Location of the Flow Switch
STEP 3 - Connecting the Flow Switch to Pipe
a.
Insert the 8/32 x 5/16" screw through lock washer, new larger
washer and paddle. Attach screw to the paddle arm and tighten
to a torque of approximately 12-16 lb•in (1.36-1.81 N•m).
NOTE: If two paddles are being installed, they must be stacked one on top
of the other with the longer paddle first in line to the flow.