Product Overview

94
HJ KLMN
NPT
4
1
⁄8 (105)
15
⁄16 (24) 3
7
⁄16 (87) 2
5
⁄8 (67) 1
1
⁄4 9
1
⁄2 (241)
• Universal design serves the widest variety of large pipe
applications, including heating and hydronic systems,
air conditioning, refrigeration and process work
•1
1
⁄4" NPT
•Brass with sealed tube construction
• Single pole, double throw snap switch
• Magnetic switching mechanism eliminates need for
bellows
• Sensitivity adjusting screw makes flow adjustment easy
• Paddles can be trimmed to suit application needs
• Optional features
– Extended paddle arm - Model FS7-4L
– Two SPDT switches to make or break two separate
circuits
– Stainless steel body and paddles
– BSPT threads
•Minimum temperature (fluid or ambient) 32°F (0°C)
• Maximum temperature 300°F (149°C)
• Maximum operating pressure
300 psi (21 kg/cm
2
)
1000 psi (70 kg/cm
2
) – Stainless Steel models
A
G
B
F
E
C
D
H
J
L
K
M
N
2
3
4
5
6
DIA. HOLE
FOR ELEC.
CONNECTION
HEX.
PADDLE FOR
1-1/4" & 1-1/2"
(32 & 40mm) TEES
PADDLE
FOR 2" TO 5"
(50-125mm) PIPE
Packed loose
in carton.
Series FS7-4
Flow Switches – Liquid
Series FS7-4
Industrial Liquid Flow Switches
Dimensions, in. (mm)
AB CD EFG
2
7
⁄8 (73) 1
7
⁄16 (37)
7
⁄8 (22) 1
3
⁄4 (45) 13
9
⁄16 (345) 5
13
⁄16 (148) 3
3
⁄8 (86)
Electrical Ratings
Motor Switch Rating (Amperes)
Voltage Full Load Locked Rotor Pilot Duty
120 VAC 7.4 44.4
125 VA at
240 VAC 3.7 22.2
120 or 240 VAC
50 or 60 cycles
®
®
(for specified models)
Flow Switches
Flow Switches
McDonnell & Miller