Instructions
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 t
he operation of the switch.
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)
A
B
C
Caleffi North America, Inc.
3883 W. Milwaukee Road
Milwaukee, WI 53208
T: 414.238.2360 F: 414.238.2366
CALEFFI