Our two-pass, three-pass or four-pass Scotch Marine(Fire Tube) boilers are available in dryback, wetback, steam or hot water versions; from 15 to 800 hp with pressures to 300 psig.
Hurst Scotch Marine boilers are rated to 81% minimum efficiency. They are designed with davited rear doors for minimum maintenance and rugged construction for extra-long life. UL listed boiler/burner packages for firing gas, oil or a combination of both. They are factory tested and checked for optimum operating efficiency.
Two pass dry back scotch marine boiler. Two pass design eliminates refractory baffles between flue gas passes. Minimum maintenance with rugged construction for extra-long life. Efficiencies allow for burning number 5 and number 6 oil with complete combustion with low heat release.
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.
Three-pass dry back scotch marine boiler. Rear smoke box includes slip-on stack connector and features hinged and davited rear doors.
The Hurst 400 Series three-pass wetback scotch marine boiler is an ideal choice for all commercial and industrial applications when engineering mechanical systems using the latest HVACR technologies. The Hurst 400 Series Boiler provides fuel efficiencies that exceed most four-pass designs. Having no large refractory rear door, these boilers allow one technician easy access to all tubes. The boilers' front doors can be opened without removing any burner components or controls.
Capacities From 30 to 2,000 HP 670 to 3,348 MBTU/HR. 15 PSI Steam 30 PSI Water (60 PSI Water Optional)
Modified three-pass scotch marine fire tube boiler. Designed for minimal clearances where installation and floor space are the challenge. Durable features start with the thickest vessel shell in its class, along with large furnace volume for ultimate combustion efficiency.
Modified three-pass scotch marine steam boiler. Designed to fit throu a standard 36"x80" door opening. Durable features start with the thickest vessel shell in its class, along with large furnace volume for ultimate combustion efficiency.
Three Pass Wet Back Design Scotch Marine Boiler. Extra large furnace for low heat release.
Available in 8 Models from 100 - 2000 BHP. Steam Pressures to 15-300 PSI. Hot Water Section I and Section IV