Pipe
Mode of Operation
Size NPT
Flow
No Flow
in. (mm)
Settings
gpm (lpm) gpm (lpm)
3
⁄
4
(20)
Factory or
or
Minimum
.12
(.45)
.06
(.23)
1
(25)
Maximum
2.5
(9.46)
1.5 (5.68)
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.
Flow Rates
Values are ± 10%
Max. Flow
Rate gpm (lpm)
w/o Paddle
Damage
INSTALLATION –
STEP 1 - Determine the Location of the Flow Switch
5 x D
MINIMUM
5 x D
MINIMUM
D= PIPE DIAMETER
3/4
" or 1" PIPE
D
• 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.
70 (265)
GPM CAPACITY
FS6 SERIES PRESSURE DROP
90
80
70
60
50
40
30
20
10
DIFFERENTIAL PRESSURE
10
20
30
40
50
60
70
FS6 VELOCITIES IN FPS
40
30
20
10
VELOCITY IN FEET PER SECOND
GPM CAPACITY
10
20
30
40
50
60
70
FS6
-
3
/
4
"
PIPE
FS6-1
"
PIPE
