Series 250

Series 250 Boilers
Two Pass Semi Wet-Back Packaged Scotch Boilers
Two-pass semi wet-back scotch marine boiler. Two pass design eliminates refractory baffles between flue gas passes. Efficiencies are equal to 3 and 4 pass boilers in many cases.
Horsepower:
20-1,000HP
MBTU/HR:
670-33,475MBTU/HR
Steam To:
450PSI
Introducing the New Hurst Series 250 Boiler
The all new Hurst 250 Series Boiler has been designed and developed specifically for the International Market, and engineered to fit easily in a 40 ft shipping container. The advanced computer modeled design enables Hurst to provide a full wet-back scotch marine boiler with a larger furnace, and a lesser amount of technically enhanced tubes. 

The improved two-pass design that eliminates refractory baffles between flue gas passes, offers performance equal to 3 and 4 pass boilers in many cases. This improves the efficiency of the boiler by up to 2%, as well as providing lower NOx levels. Additionally, shipping costs can be reduced as much as 2-10x previous cost, saving thousands of dollars.

Available in Steam or Hot Water Versions/15 - 800 HP, Pressures to 300 psig
Standard Features
  • Boiler is of the two-pass, scotch type, built and stamped in accordance with the requirements of the ASME Code, and listed by the National Board of Boilers and Pressure Vessel Inspectors.
  • Large combustion chamber with low heat release for complete combustion.
  • Smoke box is front-mounted with slip-on stack connector.
  • Access to fireside is accomplished with davited rear door and with split front doors. Flame observation ports are on front and rear.
  • Openings for cleanout inspection of waterside are provided with 3" x 4" hand holes, and with 12" x 16" manholes (80 HP up).
  • Insulated with 2" high-density mineral wool, lagged with 22 gauge grip jacketing, baked on epoxy enamel to resist chipping and fading.
  • Fire tubes are rolled and beaded on power boilers, expanded and flared on low pressure boilers (2" dia. through 30 HP, 2 1/2" dia. 40 HP and up).
  • Supports include lifting lugs securely welded to the top of shell; structural steel support legs on skids support the boiler so that special foundations are not required.
Standard Steam Trim
  • Operating & limit pressure control
  • Modulating pressure control (when applicable)
  • Water column with gauge glass, M-M 157 combination low water cut-off & pump control
  • Probe Aux, L.W.C.O.
  • Steam pressure gauge, syphon & test cock
  • Water column drain valve
  • Safety relief valve(s) per ASME Code
Standard Water Trim
  • Operating & limit temperature control
  • Modulating temperature control (when applicable)
  • Probe type low water cut-off control
  • Combination pressure, temperature and altitude gauge
  • Hot water return baffle for shock resistance
  • Safety relief valve(s) per ASME Code
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