Construction: Designed as per ASME code section I or IV
Capacities: From 20 to 1200HP (200 to 12000kw)
Pressures: 15 to 200PSIG (1 to 14bars) design or higher if required
Applications: Low and High steam pressures low and high temperature hot water glycol/water mixtures thermal fluid up to 600F(315C)
Fuels: Oil, gas or combination

-Large furnace dimensions and large steam drum
-Symmetrical design and staggered tube arrangement with balanced combustion gas and fluid velocities for high heat transfer rate.
-Large downcomers located inside front and rear walls.
-Tangent tube furnace wall.
-Membrane tube rear waterwall (optional membrane tube front waterwall)
-Seal welded gas tight inner casing.

Standard Trims and Equipment:
-High limit temperature or pressure control with manual reset
-Modulating or high-low controller
-Probe type low water cut off
-Flame safeguards control
-Boiler or burner mounted control panel
-Convenient operator controls and status lights
-Operating temperature or pressure controls
- Temperature or pressure gauge
-Safety relief valve(s)
-Fully modulating or high-low burner
-Main and pilot fuel trains
-Optional combustion control systems and boiler trims available to comply with the most stringent specifications and applications

Efficiency / Symmetry:
-The Aquatube boiler is a multipass balanced flow watertube design with staggered tubes and longitudinal gas passes.
-Heat transfer and turbulent gas flow is optimized for efficient heat transfer by using a true symmetrical and staggered tube layout with balanced combustion gas and fluid velocities.
-Symmetrical tube configuration allows for minimal tube removal clearances of less than half a boiler width between boilers in multiple unit installations.
- Insulation characteristics are excellent .The tangent tube furnace walls insulated with 2,000F ceramic fiberboard secured by the heavy gauge steel inner casing panels. The steel outer cladding allows for a suitable air gap for low outer casing temperatures and minimal radiation losses.
-Efficiencies of up to 85% are normal without the use of external heat recovery equipment.

Low Maintenance:
-Tube to header connections are industry standard, rolled and expanded or seal welded depending on the boiler capacity and application. Optional drive fit ferrules for ease of site assembly are also available.
-All inner casing panels are seal welded to provide a gas –tight inner envelope and outer casing panels are bolted construction for ease of assembly and easy removal for maintenance.
-The Aquatube boiler is thermal shock proof on the fluid side and combustion gas side. Water return temperatures to the boiler are acceptable at the minimum allowable temperature above the flue gas dew point .Differential temperatures of up to 150F can be achieved when operating on high temperature water or thermal fluid.
-Large diameter downcomers located inside the boiler casing provide excellent natural circulation. There is no requirement for external circulating pumps or site insulation.
-Access to the Furnace is available through a rear door without changing the burner setting or disconnecting fuel piping.
-Soot blowers can be supplied for applications when heavy oil or high fouling factor fuels are fired.
-Water-cooled rear target wall design provides additional heating surface area, higher efficiency, lower emission results and the elimination of high maintenance refractory. An optional water-cooled front wall design is available to provide additional heating surface and complete elimination of refractory.

Retrofit:
-The Aquatube boiler is ideal for boiler replacement projects. The entire unit can be supplied as a field assembly kit and is easily erected on site when boiler room access is a problem. As the entire boiler assembly can be bolted and the tubes can utilize a drive fit. There are no requirements for site welding or pressure vessel welding certificates.

Emissions:
-The generous furnace volume design and resultant low heat release rates with minimal use of refractory results in a boiler design. That is excellent for low NOX applications.
-NOX emissions lower than most current regulations are easily achieved.