Superior Boiler Works 350 HP 150 PSI Packaged Steam Boiler 4-X-1506 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