Fire tube boiler (scotch marine boiler) Two pass dry back
15 - 800 hp, max. 300 psi | 250 series Hurst Boiler

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.

imageAvailable 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.