SPECIFICATIONS
McDonnell & Miller Liquid Flow Switch, Series FS250
Features and Benefits
Common switching mechanism for both the FS251 and FS254
Measured flow-rate sensing of 5.8 gpm in 1β pipe (2.2 fps) in horizontal pipe installations, which is 18% lower than measured flow of comparable general purpose flow switches from major competitors. (Refer to submittal MM-627 for flow rates.)
1-inch NPTM brass pipe connection
1β, 2β, 3β and 6β Stainless steel paddles standard
Section IV boiler ratings of 250ΒΊ F and 160 psig
No lead construction
Housing materials:
β FS251 β stamped sheet steel base with glass reinforced
polycarbonate cover
β FS254 β Cast aluminum base and cover
PARTS