General Purpose Liquid Flow Switch

Allows the system to turn off pumps when there is a domestic all for H/W (Priority delay), or turn pumps on when there is flow in a circuit (Indirect Domestic Heating), as well as many other applications.

• Universal design serves the widest variety of applications
• For starting or stopping electrically operated equipment such as signal lights, alarms, motors, automatic burners, metering devices and others
• Replacement for common flow switches from Johnson/Penn, Potter/Taco, Watts, Hydrolevel and other manufacturers
• 1" NPT
• Two electrical knock-outs allows connection from either end
• Sensitivity adjusting screw makes flow adjustment easy
• Single pole, double throw snap switch
• Hardened stainless steel bearings minimize friction
• Sealed Monel bellows
• Four stainless steel paddles included - 1", 2", 3" & 6" (25, 50, 80, & 150mm)
• Optional features
• Time delay (5 or 20 seconds)
• Two SPDT switches to make or break two separate circuits
• Reinforced paddles
• Materials of construction suitable for corrosive liquids
• Fire sprinkler service - Model FS4-3F only
• BSPT threads
• Minimum temperature (fluid or ambient) 32°F (0°C)
• Maximum temperature 300°F (149°C)
• Maximum pressure 160 psi (11.3 kg/cm2