1/4
HTW-F61 Liquid Flow Switches are Single - Pole,
Double - Throw (SPDT) flow switches that are used
in liquid lines carrying water,ethylene glycol,or other
liquids not classified as hazardous, They can be
wired to energize one device and de-energize an-
other device powered from the same source when
liquid flow either exceeds or drops below the set
flow rate.
Note: The F61 Flow Switch cannot be used where
F61 Flow Switches are designed for
the liquid in the pipes will drop below the
liquid's freezing point, causing an internal
freeze-up.
IMPORTANT:
use only as operating controls. Where
an operating control failure would re-
sult in personal injury and /or loss of
property, it is the responsibility of the
installer to add devices (safety, limit
controls) or systems (alarm, supervi-
sory systems) that protect against or
warn of control failure.
Figure 1: F61KB Flow Switch
Figure 2: F61KB Dimensions (in./mm)
FLOW-MO
4.00
102
2.00
51
2.66
68
4.78
1.28
1.10
28
121
33
1.72
1.39
35
2.78
71
0.875
22.23
0.50
13
1.093
27.76
0.75
19
44
Use these wrench flats
to tighten the flow switch
at installation.
Paddle
screw
1 in. 11-1/2 NPT
C
Diameter Hole
for Conduit with
Diameter Knockout
Ring for Conduit
Grounding Screw Hole
D
Pipe Size
1.00
25
2.00
51
3.00
76
4.00
101
5.00
152
1.44
37
2.53
64
3.51
89
6.60
168
6.60
168
1.00
25
1.13
29
1.13
29
1.13
29
1.13
29
C
D
HTW-F61KB Series Liquid Flow Switch
Hotowell International Co.,Limited | www.hotowell.com | Tel.:+86-592-3327332 | Fax.:+86-592-3272142
