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.
Flow Rates
Mode of Operation
Size NPT Flow No Flow
Model in. (mm) Settings gpm (lpm) gpm (lpm)
Factory or
11⁄4 (32) Minimum 4.8 (18.2) 3 (11.4) 47
Maximum 7.7 (29.1) 5.9 (22.3)
(178)
Factory or
11⁄2 (40) Minimum 6.3 (23.8) 3.6 (13.6) 63
Maximum 10 (37.9) 7 (26.5) (239)
Factory or
2 (50) Minimum 9.9 (37.5) 5.9 (22.3) 105
Maximum 15.8 (59.8) 11 (41.6) (398)
Factory or
21⁄2 (60) Minimum 15.3 (57.9) 9.5 (36) 149
Maximum 23.7 (89.7) 17 (64.3) (565)
Factory or
3 (80) Minimum 24.4 (92.4) 15.4 (58.3) 230
Maximum 35.5(134.4) 29.2(110.5) (872)
Factory or
4 (100) Minimum 33.3 (126) 21.1 (79.9) 397
Maximum 61.4(232.4) 37.7(142.7) (1505)
Factory or
FS7-4 5 (125) Minimum 44.4(168.1) 31 (117.3) 654
Maximum 84 (317.9) 51 (193) (2479)
Factory or
6 (150) Minimum 56.3(213.1) 48.7(184.3) 900
Maximum 114.8(434.5) 71 (270.6) (3411)
Factory or
8 (200)* Minimum 104(393.6) 89 (336.9) 1,500
Maximum 210(794.9) 131(495.8) (5,677.5)
Factory or
10 (250)* Minimum 184(696.4) 157(594.2) 2,500
Maximum 369 (1397) 231(874.3) (9,462.5)
Factory or
12 (300)* Minimum 289 (1094) 247(934.9) 3,500
Maximum 582 (2203) 363 (1374) (13,247.5)
Factory or
14 (355)* Minimum 387 (1465) 323 (1223) 4,000
Maximum 753 (2850) 495 (1874) (15,140)
Factory or
16 (405)* Minimum 513 (1942) 428 (1620) 5,000
Maximum 998 (3777) 656 (2483) (18,925)
Factory or
20 (500)** Minimum 520 (1968) 260 (984) 8,000
Maximum 780 (2952) 693 (2623) (30,280)
Factory or
24 (600)** Minimum 752 (2846) 376 (1423) 12,000
FS7-4L Maximum 1128(4269) 1002(3793) (45,420)
Factory or
30 (760)** Minimum 1177(4455) 589 (2229) 20,200
Maximum 1766(6684) 1570(59842) (76,457)
Factory or
36 (910)** Minimum 1723(6522) 861 (3259) 28,270
Maximum 2584(9870) 2297(8694) (107,002)
Values are ± 10%
* Equipped with a 6" (152mm) paddle
** Equipped with a 12" (304mm) paddle
Max. Flow
Rate gpm
(lpm) w/o
Paddle Damage