DWYER WATER LEVEL CONTROLLER, SPDT MERCURY
 

• 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
• Offers the same long lasting service with a direct action mercury switch movement that provides a close deadband where needed
  
  Specifications:
  Functional 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: Snap Switch: 15A @ 120/240/480 VAC, 0.5A @ 120 VDC resistive, 0.25A @ 240 VDC resistive. Mercury Switch: 4A @ 120 VAC/DC, 2A @ 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
  Specific Gravity: 0.88 minimum
  
  General Specifications
  Weight: 20 lb (9.1 kg)
  Agency Approvals: UL and CSA (snap switch is not rated)
  Deadband: Approximately 1-1/2" (38.1 mm)