• Natural Gas
• Oil
• Combination
• Steam
• Hot Water

• Boiler is of the three-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 rear-mounted with slip-on stack connector.
• Access to fireside is accomplished with hinged and davited front and rear doors. Flame observation ports are located on front and rear.
• Openings for vessel cleanout and inspection of waterside are provided with 3″ x 4″ hand holes, and 12″ x 16″ manway access.
• Insulated with 2″ high density mineral wool, lagged with 22 gauge grip jacketing, baked on finish to resist chipping and fading.
• Firetubes are rolled and beaded on power boilers, expanded and flared on low pressure boilers.
• 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.

• Operating & high limit pressure control
• Modulating pressure control (when applicable)
• Water column with gauge glass, 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

• Operating & high limit temperature control
• Modulating temperature control (when applicable)
• Probe type low water cut-off control
• Combination pressure & temperature gauge
• Hot water return baffle for shock resistance
• Safety relief valve(s) per ASME Code

Boiler Design
Three-Pass “Scotch Marine” Firetube design with stress relieving “Wetback” construction. Pressure designs for steam are 15-300 psi. 100-600 hp. 250 psi. max. for 700-1500 hp. and 200 psi. max. for 1800-2000 hp. Hot Water pressures models are from 30-160 psi. High pressure, high temperature Section I hot water boilers available. Factory assembled with trim, tested, ASME code, UL, and CSD-1 standards.

Steam Model Trim
Safety relief valve, operating pressure control, high limit pressure control with manual reset, steam pressure gauge with syphon, combination pump control and low water cut-off with gauge glass assembly and drain valve, auxiliary low water cut-off with manual reset.
Hot Water Model Trim
Safety relief valve, operating temperature control, high limit temperature control with manual reset, combination pressure & temperature gauge, low water cut-off control with manual reset. BURNER: Matched UL listed “forced draft” power burners with factory prepiped, wired and tested fuel configurations for natural gas, propane (LP) gas, No. 2 (diesel) oil, or combination of both gas/oil.