Description

McDonnell & Miller FS-254 is a universal mechanical liquid flow switch, designed for turning On or Off a wide variety of electrically-operated equipment (pumps, alarms, burners, etc.). Includes a set of (4) rigid stainless paddles for use with various diameter pipes (sizes 1″ through 8″). Integral screw for adjusting flow sensitivity. NEMA 4 enclosure rated for outdoor use. Standard 1″ male NPT threaded connection.

Cross-References:

McDonnell & Miller: FS-8W
Hydrolevel: FS204
Taco: IFSWS

Features:

Includes (4): 1″, 2″, 3″, & 6″ rigid stainless steel paddles for fitting into pipes of different sizes
NEMA 4 rated for outdoor use
Starts or stops electrical equipment, such as pumps, alarms, motors, burners, and metering devices, when water flow is detected in a system
Replaces common flow switches from Johnson/Penn, Taco, Watts, Hydrolevel, and other manufacturers
Suitable for pipe sizes from 1″ to 8″
Adjustable flow senstitivity via internal screw
cULus listed

Technical Specifications:

Electrical Specs: SPDT (Relay Type), NEMA 4 Enclosure
Application: 1″ – 8″ pipe sizes
Flow Rates: Refer to image specs for minimum and maximum rates for 1″ – 8″ pipe sizes
Connection: 1″ NPT, Threaded
Max Flow Velocity: 10 ft/sec
Pilot Duty: 125 VA @ 120 or 240 VAC; 50/60 Cycles
Switch Rating: 7.4 FLA, 44.4 LRA @ 120 VAC; 3.7 FLA, 22.2 LRA @ 240 VAC
Max Pressure: 160 psi
Max Water Temperature: 250°F
Max Ambient Temperature: 120°F

Warranty:
1-year warranty from the date of installation; 2-year warranty from the date of manufacture