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The SPB Immersion Fired Series of hot water boilers is well known throughout the industry for its unique single-pass design and burner technology. The single pass immersion firetube design delivers premixed air and gas through multiple burner nozzles. A corresponding flue tube (“firetube”), completely immersed in liquid, is aligned with the nozzle head inside the combustion chamber. Upon combustion, the nozzles generate a focused, high velocity flame which radiates down the center of each tube. The benefits of the technology in the SPB Immersion Fired Series hot water boilers include:
Natural Efficiency
- Up to 84% efficiency
- Radiant heat is maximized across the primary heating surface
Low Maintenance Cost and High Longevity
- Elimination of thermal shock due to balanced heat transfer across primary heating surface; allowing for up to 150° F ΔT
- Backed by a 20-year non-prorated thermal shock warranty
- Elimination of refractory breakdown due to single pass design (no refractory material is used)
Ease of Maintenance
- Hinged door provides quick access to burners, manifold and heating tubes for easy cleaning and routine maintenance
- Trimmed with non-proprietary components
Simplicity of Design
- No complex controls which require intensive training
- Fewer moving parts reduces incidence of failure and required retuning
Low NOx and CO Emissions
- Less than 30ppm NOx
Engineering data from the previous website can be found at: http://www.sellersengineering.com/engdata.asp . CAD drawing and design templates can be found at: http://www.sellersengineering.com/producttemp.asp
Hot Water Boiler - SPB Immersion Fired Series Specifications
- One-pass horizontal fire tube boiler
- Combustion: Sealed
- Heat Exchanger: Steel tubes ("XID")
- Input Range: 10 – 800 HP (0.4 – 33.4mmBTU)
- # of Unit Sizes: 20
- NOx Rating: Less than 30ppm
- Standard Efficiency: 84%
- Certifications: ASME "H" stamp, UL
- Warranty: 1-year (parts)/ 20-year (shell)
- Fuels: Natural gas, propane, biogas
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