Install Instructions

FLOW RATES
Flow rates required to activate flow switch are shown
in chart below. The values are calculated for sensing
water (potable, non-polluted) in a horizontal pipe.
Settings will vary when used to sense flow of other
fluids.
3
NOTE: DO NOT USE LIQUID FLOW
SWITCHES ON SYSTEMS WITH
FLOW VELOCITY GREATER THAN
10 FEET (3M) PER SECOND.
INSTALLATION –
STEP 1 - Determine the Location of the Flow Switch
Fluid Flow
3/4" or 1"
PIPE
5 x D
MINIMUM
D
D= PIPE DIAMETER
5 x D
MINIMUM
• 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 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 should 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.
Flow Rates
Pipe
Mode of Operation
Size NPT Flow No Flow
in. (mm) Settings gpm (lpm) gpm (lpm)
3
⁄
4
(20)
Factory or
or Minimum 1.5 (5.7) 1.1 (4.2) 16.62 (63)
1 (25)
Maximum 15 (56.8) 10 (37.9) 27 (102)
Values are ± 10%
Max. Flow
Rate gpm
(lpm) w/o
Paddle Damage