Install Instructions

F261 Series Flow Switches Installation Instructions
8
Table 4: Flow Rates for Standard Models, 1-3 in. Paddles, GPM (m
3
/hr)
GPM (m
3
/hr) Required to Activate Switch for Pipe Size (in.)
1
1-1/4
1
1-1/2
1
2
2-1/2
2
3
4
3
5
3
6
3
8
3
Minimum
Adjustment
Flow
Increase
(Close
R to Y)
4.20
(0.95)
5.80
(1.32)
7.50
(1.70)
13.7
(3.11)
18.0
(4.09)
27.5
(6.24)
65.0
(14.8)
125
(28.4)
190
(43.2)
375
(85.2)
Flow
Decrease
(Close
R to B)
2.50
(0.57)
3.70
(0.84)
5.00
(1.14)
9.50
(2.16)
12.5
(2.84)
19.0
(4.32)
50.0
(11.4)
101
(22.9)
158
(35.9)
320
(72.7)
Maximum
Adjustment
Flow
Increase
(Close
R to Y)
8.80
(2.0)
13.3
(3.02)
19.2
(4.36)
29.0
(6.59)
34.5
(7.84)
53.0
(12.0)
128
(29.1)
245
(55.6)
375
(85.2)
760
(173)
Flow
Decrease
(Close
R to B)
8.50
(1.93)
12.5
(2.84)
18.0
(4.09)
27.0
(6.13)
32.0
(7.27)
50.0
(11.4)
122
(27.7)
235
(53.4)
360
(81.8)
730
(166)
1. Values for 2 in. paddle trimmed to pipe.
2. Values for a 3 in. paddle trimmed to fit pipe.
3. Values calculated for a factory-installed set of 1, 2, and 3 in. paddles.
Table 5: Flow Rates for Standard Models, 6 in. Paddles, GPM (m
3
/hr)
GPM (m
3
/hr) Required to Activate Switch for Pipe Size (in.)
4568
Minimum
Adjustment
Flow Increase
(Close R to Y)
37.0 (8.40) 57.0 (12.9) 74.0 (16.8) 205 (46.6)
Flow Decrease
(Close R to B)
27.0 (6.13) 41.0 (9.31) 54.0 (12.3) 170 (38.6)
Maximum
Adjustment
Flow Increase
(Close R to Y)
81.0 (18.4) 118 (26.8) 144 (32.7) 415 (94.3)
Flow Decrease
(Close R to B)
76.0 (1.93) 111 (25.2) 135 (30.7) 400 (90.8)
Table 6: GPM (L/Min) Required to Actuate F261 Series Low Flow Switches
Pipe Size
1/2 x 1/2 in.
Female NPTF
1
3/4 x 3/4 in.
Female NPTF
2
3/4 x 3/4 in.
Female NPTF
3
Minimum
Adjustment
Flow Increase (R to Y Closes) 1.30 (4.92) 2.00 (7.57) 10.90 (41.26)
Flow Decrease (R to B Closes) 0.60 (2.27) 0.60 (2.27) 7.20 (27.25)
Maximum
Adjustment
Flow Increase (R to Y Closes) 2.60 (9.84) 3.60 (13.63) 17.00 (64.35)
Flow Decrease (R to B Closes) 1.25 (4.73) 1.30 (4.92) 14.20 (53.75)
1. F261KEH-V01C, F261MEH-V01C
2. F261KFH-V01C, F261MFH-V01C
3. F261KFH-V02C (designed for steam applications)