Water level control | cast iron chamber | DPDT (2 SPDT) mercury switches.
Series 123/125 Boiler Water Level Control
The Series 123 & 125 Boiler Water Level Controls are designed for boiler applications, the 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. The 125 offers the same long lasting service with a direct action mercury switch movement that provides a close deadband where needed.
Product Applications
- Boiler Low Water Cut-Off
- Boiler Feed-Water Control
- Condensate Tanks
- Deaerators
- Special snap action switch mechanism options eliminates frequent operation due to surging water level
- Transparent cover provides convenient visible operation of the switch
- Flanged chamber for easy clean out and replacement of float or switch mechanism without removing the unit from piping
- Series
- 123/125 Boiler Water Level Control
- Category/Type
- Level
- Type
- Level Switches
- Series
- 123/125 Boiler Water Level Control
- Service
- Compatible liquids. Cast iron is not for use with lethal or flammable substances either liquid or gaseous.
- Wetted Materials
- Body: Cast iron. Float: 304 SS. Trim and packing gland: Brass. Packing: Carbon. Body gasket: Carbon.
- Temperature Limit
- Ambient Temperature: 212?F (100?C);Process Temperature: 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
- Snap switch: 15 A @ 120/240/480 VAC; 0.5 A @ 120 VDC resistive; 0.25 A @ 240 VDC resistive. Mercury switch: 4 A @ 120 VAC/DC; 2 A @ 240 VAC/DC.
- 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.
- Deadband
- Approximately 1-1/2" (38.1 mm).
- Specific Gravity
- 0.88 min.
- Options
- Manual reset.
- Weight
- 20 lb (9.1 kg).
- Agency Approvals
- CSA; UL. (Snap switch is not rated).
Resources
WASHING INSTRUCTIONS:
Machine wash separately in cold water on a gentle cycle. Tumble dry separately on low heat. Add QE Home Wool Dryer Balls to reduce wrinkles and increases drying efficiency. Touch up with a low heat iron as needed. Do not bleach or dry clean.
