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Flexible Watertube Boilers

From 1.5 to 25.0 MMBTU/hr input for hot water and steam. Field-erectable packages also available.

FLX Premix

Quick ViewFLXpm 1 215 x 186
Low Emissions Performance
  • Steam and hot water
  • 75 to 250 HP
  • Available to <9 ppm NOx, ultra-low CO 
  • Natural gas or propane fuel
  • Premix burner technology

The Model FLXPM Flextube boiler achieves best-in-class combustion performance with low emissions. Premix burner technology enables the boiler to attain <20 ppm NOx without FGR and <10 CO as standard on natural gas. The modulating burner control automatically adjusts the air/gas mixture for maximum efficiency and optimum turndown.

FLX

Quick ViewFLX_1650_ST_Right_139x114Flexible Watertube Boiler
  • Steam or hot water
  • 1.5 to 25.0 MMBTU/hr
  • Natural gas, #2 Light Oil, propane, digester
  • 15 to 250 psig on steam, 160 psig on hot water
  • Available to < 9 ppm NOx
Full Details

Model 4

Quick ViewModel 4Membrane Wall Watertube
  • Steam or hot water
  • 1.5 to 6.0 MMBTU/hr
  • Natural gas, #2 oil, propane, digester
  • 15 to 500 psig on steam (special to 675 psig) on steam
  • 140 psig on hot water standard with option to 450 psig @ 410F
Full Details

Model 5

Quick ViewModel 4Membrane Wall Watertube
  • Steam or hot water
  • 1.5 to 8.0 MMBTU/hr
  • Natural gas, #2 oil, propane, digester
  • 15 to 500 psig (special to 675 psig) on steam
  • 140 psig on hot water standard with option to 450 psig @ 410F
Full Details

Model M5M

Quick ViewM5M landing pageMembrane Wall Watertube
  • Steam or hot water  
  • 2,000 to 6,000 MBTU/hr 
  • Steam to 500 psig
  • Achieves <20 ppm NOx and <10 ppm CO
  • Premix burner technology 
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Full Details