Designed for boiler applications, the Model 123 is primarily used for low water cut-off or feed-water control. Other applications include condensate tanks and deaerators. A special snap action switch mechanism eliminates frequent operation due to surging water level. A transparent cover provides convenient visible operation of the switch. Features a flanged chamber for easy clean out and replacement of float or switch mechanism without removing the unit from piping.

SPECIFICATIONS
Service: Compatible liquids. Cast iron is not for use with lethal or flammable substances either liquid or gaseous.
Wetted Materials: Body: cast iron. Float and Trim: 304 SS. Packing Gland: brass. Packing: carbon. Body Gasket: carbon.
Temperature Limit: 365°F (185°C).
Pressure Limit: 150 psig (10.34 bar).
Enclosure Rating: General purpose. Optional weatherproof.
Switch Type: SPDT snap switch or mercury switch. Optional DPDT or two stage.
Electrical Rating: See Model Chart on "Ordering" page.
Electrical Connections: Screw terminal.
Conduit Connection: 7/8" (22.23 mm) hole for 1/2" (12.7 mm) conduit.
Process Connections: 1" female NPT.
Mounting Orientation: Vertical.
Weight: 20 lb (9.1 kg).
Agency Approvals: UL and CSA (snap switch is not rated).
Deadband: 123 Series approximately 1-1/2" (38 mm).
Specific Gravity: 0.88 minimum.
Options: Manual reset.