McDonnell & Miller Series FS7-4 Industrial Liquid Flow Switches

• Universal design serves the widest variety of large pipe applications, including heating and hydronic systems, air conditioning, refrigeration and process work
• 11⁄4″ 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/cm2)
1000 psi (70 kg/cm2) – Stainless Steel models