Mcdonnell & Miller FS7-4, 1-1/4" Flow Switch-Paddle Style

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 Fire sprinkler service - Model FS7-4F- for 11/4" thru 21/2" NPT piping only (see chart p.93) Minimum temperature (fluid or ambient) 32 Deg.F (0 Deg. C) Maximum temperature 300 Deg. F (149 Deg. C) Maximum operating pressure 300 psi (21 kg/cm2) 1000 psi (70 kg/cm2) – Stainless Steel models Pneumatic control - FS7-4A - option available w/ 1/8" NPT airline connection; max. 50 psi air supply (non-electrical)