Fire Tube Boilers

Sellers Fire tube boilers were originally designed to solve the problems that are inherent to the traditional scotch marine boiler design. All firetube boilers distribute energy through a collection of water-backed tubes to enable heat transfer. The Sellers Boiler is innovative in how it distributes that energy at the point of combustion, rather than a turnaround chamber. Uniform application of combustion energy eliminates thermal shock and allows relief of any possible energy buildup in the vessel through a rear relief door, which is unique in the industry.

In a traditional Scotch Marine Boiler, by contrast, 100% of the combustion energy feeds into the furnace. Because of its design flaws, the scotch marine boiler still presents the risk of thermal shock, resulting in a myriad of associated issues that will ultimately require significant maintenance and loss of operation time.

The Sellers Fire Tube Boiler Design

Fire Tube Boiler Types

Sellers offers more than one type of fire tube boiler because we understand that different customers have different needs. But despite the differences, each of our boilers comes with the same first-rate quality that Sellers customers have come to expect. Explore our variety of options, including single-pass, two-pass, and three-pass designs.

Sellers Fire Tube Boiler Advantages

  • Eliminate thermal shock.
  • Achieve full capacity steam from a cold start in under 20 minutes.
  • Minimize time and fuel lost to long warm up periods.
  • Eliminate turnaround chamber joint failure and refractory maintenance.
  • Enhance safety by distributing energy evenly through the boiler at the point of combustion and incorporating a rear relief door.
  • Control with Siemens state of the art LMV5 Linkageless Burner Management System.
  • Enjoy a low cost of ownership and a long, productive boiler life.
  • Unmatched 20 year pressure vessel warranty and five year burner warranty.

Radiant Heat

The most efficient heat transfer occurs where the combustion in the fire-tubes touch the water in the vessel. This is known as the radiant heat of combustion. The Sellers single pass boiler has significantly more radiant heat transfer than a Scotch Marine, with up to 50% of each fire-tube in a Sellers boiler touching the fire, while only the furnace is subject to radiant heat transfer in a scotch marine boiler.

Single-Pass Fire Tube Boilers

S-SERIES TRIM

X-SERIES TRIM

H-SERIES TRIM

  • Style: High Efficiency Single-Pass Design
  • Burner: Sellers Multi Flame w/ Parallel Positioning
  • Size: 40 – 900 HP (1.7 – 37.7mmBTU)
  • Burner Operation: Modulating (3:1 on 40-175HP & 4:1 on 200-900HP)
  • Emission Rating: 30ppm NOx
  • Certifications: ASME, CRN, & UL
  • Warranty: 20-Year (Pressure Vessel) / 5-Year (Burner) / 1.5-Year (Parts)
  • Fuels: Natural Gas, Propane, & Digester/Methane
  • Application: Steam (15-300 PSI) & Commercial Hot Water & Industrial High Temperature Water 350+ Deg F.
  • Style: High Efficiency Single-Pass Design
  • Burner: Sellers Multi Flame
  • Size: 10 – 900 HP (0.4 – 37.7mmBTU)
  • Burner Operation: On/Off w/ Pilot Hold
  • Emission Rating: 30 & 20ppm NOx
  • Certifications: ASME, CRN, & UL
  • Warranty: 20-Year (Pressure Vessel) / 5-Year (Burner) / 1.5-Year (Parts)
  • Fuels: Natural Gas, Propane, & Digester/Methane
  • Application: Steam (15-300 PSI) & Commercial Hot Water & Industrial High Temperature Water 350+ Deg F.
  • Style: High Efficiency Non-Ferrous Single-Pass Design
  • Burner: Sellers Multi Flame w/ Parallel Positioning (40-300HP) & Sellers Multi Flame (10-300)
  • Size: 10 – 300 HP (0.4 – 12.6mmBTU)
  • Burner Operation: On/Off (10-300HP) & Modulating (3:1 on 40-175HP & 4:1 on 175-300HP)
  • Emission Rating: 30ppm NOx
  • Certifications: ASME & UL
  • Fuels: Natural Gas & Propane
  • Application: Chemical Clean Steam (15PSI), Humidification (15PSI), & Direct Injection (15PSI)

Two-Pass Fire Tube Boiler

 

The reason a customer might prefer one of our two-pass fire tube boilers instead of a single-pass boiler is that our two-pass boiler systems are designed explicitly for tighter space constraints. This optimal piece of equipment offers the small footprint application capacity you need while still providing Sellers-level quality.

  • Style: Two-Pass For Small Footprint Applications
  • Burner: Sellers Multi Flame
  • Size: 20 – 125 HP (.8 – 5.2mmBTU)
  • Burner Operation: On/Off w/ Pilot Hold
  • Emission Rating: 30 & 20 ppm NOx
  • Certifications: ASME
  • Warranty: 10-Year (Shell) / 5-Year (Burner) / 1.5-Year (Parts)
  • Fuels: Natural Gas & Propane
  • Application: Steam (15-150 PSI) & Hot Water

Ygnis Fire Tube Boiler

 

Ygnis fire tube boilers are used exclusively for oil burning applications. Even though this design has a more limited applicability than our single-pass & two-pass fire tube boilers, Sellers is committed to providing a boiler for every specific need our customers face.

  • Style: Three-Pass
  • Burner: Gun Burner; multiple vendor options
  • Size: 20 – 300 HP (.8 – 12.5mmBTU)
  • Burner Operation: On/Off & Modulation
  • Emission Rating: 30 ppm NOx
  • Certifications: ASME
  • Warranty: 3-Year (Shell) / 1.5-Year (Parts)
  • Fuels: #2 Oil
  • Application: Steam (15-150 PSI) & Hot Water