USED 1997 SUPERIOR BOILER 4-X-1506

OVERVIEW
This is a Superior Boiler Works (Mohawk Boiler-Burner Unit) packaged firetube steam boiler, Model 4-X-1506, rated 350 boiler horsepower. Factory-built by Superior Boiler Works Inc. of Hutchinson, Kansas, with an Industrial Combustion (Division of Aqua-Chem Inc.) burner control system, water column and gauge glass, and complete trim. Low-pressure design, 150 PSI steam maximum allowable working pressure. Year built 1997.
The unit carries a documented, active inspection history, most recently inspected internally on 9-29-25, with next inspection due 9-29-26. It is registered under National Board No. 13357 and holds current Liberty Mutual and HSB (Hartford Steam Boiler) inspection tags. Ready for inspection, contact us to schedule.
 
EQUIPMENT SPECIFICATIONS
 
Boiler:

Manufacturer: Superior Boiler Works, Inc., Hutchinson, KS, USA (Mohawk Boiler-Burner Unit)
Equipment Type: Packaged Firetube Steam Boiler
Model: 4-X-1506
Boiler Horsepower: 350 HP
Maximum Allowable Working Pressure (MAWP): 150 PSI Steam
Heating Surface: 1,506 sq ft
Minimum Valve Capacity: 12,048 lbs/hr (BTU/hr)
Serial No. / National Board No.: 13357
Year Built: 1997

 
Burner and Combustion:

Industrial Combustion (Division of Aqua-Chem, Inc.) burner control system
Digital display control panel with manual switches

 
Trim and Controls:

Water column with gauge glass and low-water cutoff (LWCO)
Steam pressure gauge
Factory control panel and disconnect

 
Ancillary Equipment:

Vertical multistage feed pump
Horizontal feedwater/storage tank on stand
Associated piping, valves, and feed system components

 
Inspection and Compliance:

Liberty Mutual Boiler and Pressure Vessel Inspection tag on file
HSB (Hartford Steam Boiler) tag, last inspected 9-29-25, next required 9-29-26
NFPA installation clearances: 18 in. top / 48 in. front / 18 in. sides-rear-flue at ≤50 PSI; 48 in. top / 96 in. front / 36 in. sides-rear-flue at >50 PSI
Must be installed on noncombustible flooring

 
KEY FEATURES AND BENEFITS

Proven Superior Boiler Works (Mohawk) firetube design
350 HP, 1,506 sq ft heating surface
150 PSI steam rating
Documented, current inspection history (HSB, Liberty Mutual)
Feedwater pump and storage tank included
National Board registered (No. 13357)

 
SYSTEM COMPONENTS

Boiler: 4-X-1506, 350 HP, built 1997, 150 PSI MAWP, gauge glass, water column, steam pressure gauge
Burner and Controls: Industrial Combustion forced-draft burner control system, factory panel
Feedwater System: vertical multistage feed pump, horizontal feedwater/storage tank, piping and valves
Documentation: National Board No. 13357, HSB and Liberty Mutual inspection tags

 
SPECIFICATIONS SUMMARY

Manufacturer: Superior Boiler Works, Inc.
Model: 4-X-1506
Boiler Horsepower: 350 HP
MAWP: 150 PSI Steam
Heating Surface: 1,506 sq ft
Minimum Valve Capacity: 12,048 lbs/hr (BTU/hr)
Year Built: 1997
Serial No. / National Board No.: 13357
Includes: Feedwater pump, feedwater/storage tank, burner control system
Condition: Used, inspected, in service prior to removal
Last Inspection: 9-29-25 (internal), next required 9-29-26

 
ADDITIONAL INFORMATION

Condition: Used, documented inspection history, reported in working condition prior to removal
Manufacturer: Superior Boiler Works, Inc., Hutchinson, KS
Model: 4-X-1506, 350 HP
Year Built: 1997
Rated: 150 PSI MAWP, 1,506 sq ft heating surface
National Board No.: 13357
Inspection: Welcome, contact us to schedule