350 HP Superior Boiler Works #4-X-1506, Packaged Steam Boiler, 150 PSI, 1506 sq.ft., 12048 BTUH, 1997

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
Location: Ohio