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      • GTB Boiler Series

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      • HOT WATER BOILERS
        • SPB Immersion Gas Fired Boiler Series
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      GTB Boiler 8700 Series - Dual Fuel Gas/Oil

      Hot Water Boilers - GTB 8700 Series

      The GTB Series of hot water boilers is a unique three pass, horizontal fire tube, water-backed boiler design developed and perfected in Switzerland and is a standard in the EU community. This particular shell design overcomes thermal shock problems common to other multi-pass boilers. Thermal stress is greatly reduced because of two unique features of the furnace. Firstly, the larger diameter, shorter furnace produces less thermal expansion than a furnace of an ordinary boiler. Secondly, the furnace end is supported by stays which are attached to the rear tube sheet. Tube sheet fatigue failures are eliminated because shear stress between the furnace and the rear tube sheet is greatly reduced.

      Compact Design

      • Greatly reduced footprint given relatively large diameter and short furnace design
      • Dual fuels:  natural gas, oil and biogas
      • up to 83% efficiency

      Engineering data from the previous website can be found at: http://www.sellersengineering.com/engdata.asp . CAD drawing and design templates from the previous website can be found at: http://www.sellersengineering.com/producttemp.asp

      Hot Water Boilers - GTB 8700 Series Specifications

      • Three-pass horizontal fire tube boiler
      • Combustion: Sealed
      • Heat Exchanger: Steel tubes
      • Input Range: 20 - 600 HP (0.8 - 25.1mmBTU)
      • # of Standard Unit Sizes: 17
      • NOx Rating: Based on burner manufacturer
      • Efficiency: 82%
      • Certifications: ASME "H" stamp, UL
      • Modulation: Based on burner manufacturer
      • Warranty: 1-year (parts)/ 20-year (shell)
      • Fuels: Natural gas, propane, biogas, #2 oil
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