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Instantly add the Series 123/125 Boiler Water Level Control and 50,000+ more product series to your store or catalog  
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Dwyer Boiler Water Level Control, Series 123/125

Series 123/125 Boiler Water Level Control

Brand: Dwyer Instruments, LLC
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The Series 23 & 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.
Features
  • 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

1 - 7 of 7 Part Numbers
123-153
123-153
DWYER Water Level Control, Cast Iron Chamber, SPDT Mercury Switch.
  • Switch Type - SPDT Mercury
123-2
123-2
DWYER Water Level Control, Cast Iron Chamber, SPST Mercury Switch, Closes on Increase.
123-3
123-3
DWYER Water Level Control, Cast Iron Chamber, SPST Mercury Switch, Opens on Increase.
123-7000-153
123-7000-153
DWYER Water Level Control, Cast Iron Chamber, SPDT Snap Switch.
  • Switch Type - SPDT Snap
123-804
123-804
DWYER Water Level Control, Cast Iron Chamber, DPDT (2 SPDT) Mercury Switches.
125-4820
125-4820
DWYER Water Level Control, Cast Iron Chamber, SPST Mercury Switch, Closes on Decrease.
125-4821
125-4821
DWYER Water Level Control, Cast Iron Chamber, SPST Mercury Switch, Opens on Decrease.
1 - 7 of 7 Part Numbers

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Specifications

Brand

Approvals & Certifications

  • CSA
  • UL - Snap Switch is Not Rated

Conduit Connection

  • 7/8” Hole for 1/2” Conduit Hub

Deadband

  • 1-1/2” (38.1 mm)

Electrical Connectors

  • Screw Terminal

Electrical Rating

  • 0.25 A at 240 Vdc Resistive - Snap Switch
  • 0.5 A at 120 Vdc Resistive - Snap Switch
  • 15 A at 120/240/480 Vac - Snap Switch
  • 2 A at 240 Vac/Vdc - Mercury Switch
  • 4 A at 120 Vac/Vdc - Mercury Switch

Enclosure, Body Material

  • Cast Iron

Environmental Protection

  • General-purpose
  • Weatherproof

Fluid Specific Gravity

  • 0.8 is Min.

Gasket Material

  • Carbon

Manual Reset

  • Optional Manual Reset

Media

  • Gas
  • Liquids & Gases

NPT Connection

  • 1” NPT Female

Packing Material

  • Carbon

Pressure Range

  • psig: 150 (bar: 10.3, kPa: 1,034)

Sensor Orientation

  • Vertical

Switch Type

  • DPDT
  • SPDT

Temperature Range

  • 0° to 185° C (32° to 365° F)

Trim Material

  • Brass

Wetted Materials

  • 304 Stainless Steel

  • Boiler Low Water Cut-Off
  • Boiler Feed-Water Control
  • Condensate Tanks
  • Deaerators

Documentation

Data Sheets

Approvals

Catalogs

Manuals

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