Series 45 Boilers

Three Pass

Firebox Packaged Boiler

All Steel Wetback Construction

Three Pass Firebox Design. Thickest boiler steel in the industry. Efficient and flexible - gas, oil, heavy oil, and combination gas/oil.

Available with Low NOx

Series 45 Boilers

8.5-813 HP


285-27,215 MBTU/HR

Steam To:

15 PSI

Hot Water To:

100 PSI

Capacities From 8.5 to 813 HP 285 to 27,215 MBTU/HR. 15 PSI Steam 30 PSI Water (60,100 PSI Water Optional)

  • Efficient 3-Pass Design
  • Flexibility - Gas, Oil, Heavy Oil, and Combination Gas/Oil
  • ASME Code Constructed & Stamped for 15 PSI Steam/30 Water
  • Registered with the National Board of Boiler Inspectors
  • Competitively Priced, Easily Maintained, Designed for Efficiency
  • Large Furnace Volume for Ultimate Combustion Efficiency
  • Unified Refractory Base Floor
  • Steel Skids and Lifting Eyes
  • Low Heat Release
  • Factory Insulated - 2" Mineral Wool
  • 22QA Zinc Coated
  • Baked on Powder Coat Finish
  • Easy Access to Fireside Surfaces
  • Ample Waterside Cleanout Openings
  • Fully Automatic Operation
  • UL Listed, Forced Draft Burners
  • Wet Back Construction
  • UL Listed Controls & Trim
  • Factory Test Fired
  • Flame Observation Ports Front & Rear

Standard Features

All units are factory packaged with operating controls, relief valves, burner and fuel train. Installation is made simple in that only service connections are needed to place in operation. Flexible burner systems are available for firing natural gas, LP gas, No.2 oil, heavy oil, or combinations. High density 2" mineral wool insulation assures lower radiant heat loss. In addition to meeting the requirements of UL, burner systems are optionally available to meet the requirements of FM, IRI, MILITARY and others.

Steam Trim

Steam pressure gauge with syphon and test cock; combination low water cut-off and pump control (or feeder); auxiliary low water cut-off with manual reset; water column gauge glass set with tricocks and drain valve; ASME safety relief valve(s); operating and high limit pressure control.

Water Trim

Combination pressure and temperature gauge; low water cut-off control with manual reset; ASME relief valve(s); operating and high limit temperature controls.