User Guide

Operating flow rates: gpm (lpm)
Calibration
The minimum and maximum operating flow rates are given in the
table below. Adjustments should be carried out as follows: turn
the calibration screw (A) in a clockwise direction for the contacts to
close at higher flow rate values or in a counterclockwise direction for
lower flow rate values. When the adjustment has been made lock the
screw (A) with the locking ring nut (B). Avoid all contact with the
presetting screw (C). An incorrect setting would seriously impair the
operation of the switch.
A
B
C
Caleffi North America, Inc.
3883 West Milwaukee Road
Milwaukee, WI 53208
T: 414.238.2360 F: 414.238.2366
Minimum calibration
Operating flow rate with
increasing flow
1"
1 1/4" 1 1/2"
2"
2 1/2"
3" 4"
5.7 7.5 11.4 13.2 22.0 29.9 44.0
4.0 5.5 8.4 9.7 16.3 22.9 37.4
12.3 16.7 26.0 29.5 51.5 69.5 94.6
11.9 16.3 25.5 29.0 50.6 68.6 92.4
Maximum calibration
Operating flow rate with
increasing flow
Diameter of pipe
Minimum calibration
Operating flow rate with
decreasing flow
Maximum calibration
Operating flow rate with
decreasing flow
6" 8"
72.6 162
63.8 145
189 334
158 308
5"
61.1
51.5
136
127
(21.7) (28.4) (43.4) (50.1) (83.5) (113) (167) (232) (275) (618)
(15.0) (20.9) (31.7) (36.7) (61.8) (86.8) (142) (197) (242) (551)
(46.8) (63.5) (98.5) (112) (195) (264) (359) (518) (718) (1269)
(45.1) (61.8) (96.9) (110) (192) (260) (351) (484) (601) (1169)
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Installation Tip
Scan to view
626 Paddle Flow Switch
7-19
-18