It is a conventional 3 pass smoke-tube design, designed for the combustion of coal and wood in an internal furnace and is therefore sometimes known as coal/wood fired Steam Boiler. This Packaged Boiler comes in dry back, semi-wet back, and fully wet-back options and is most suitable for a manual firing of Solid Fuel like coal, wood or briquettes.

Reversal chamber is the posterior portion of the boiler combustion chamber through which the flue gases travel from the furnace’s first pass to the second pass tubes. And based on the construction of reversal chamber, boilers can be classified into wet-back boilers and dry-back boilers.

Horizontal Return Tubular Fire Tube Boiler. As one of the oldest and most simple designs for … Disclaimer. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only.

Dry back – the rear of the furnace is surrounded by sheet metal only. Steam dome – a dome mounted onto the top of the boiler shell to aid steam liberation. Number of furnaces – a boiler may have between one to three furnaces (general rule). Furnace design – corrugated or non- corrugated. The below image shows a corrugated furnace i.e

Our offered Wet Back Boiler that comes with a reversal chamber that is completely surrounded by water, which is used to direct flow gasses from the furnace to the tube banks. The surrounding water absorbs burner heat, helping improve operating efficiency as heat from combustion goes directly into evenly heating water instead of refractory.

The dry back boiler design uses a common rear tube sheet and features convenient fire-side and water-side access. Dryback boilers have a larger functional footprint due their heavy, vessel-sized rear door which requires sufficient space to open and a cool-down period prior to opening.

WNS series boiler is well known as a horizontal style three pass wet back boiler.This type boiler used widely in industries and can be designed as steam boiler or hot water boiler according customer inquiry. The fuel of WNS series horizontal style 3 pass wet back boiler can be oil or gas,which is fast-loading internal combustion three return fired tube boiler.

Three pass boilers: A three pass design provides three opportunities for heat transfer. The stack temperature of 3 pass will be lower than that of 2 pass boiler, of the same design and operating pressure. Efficiency is more than two pass boiler.

Boiler is of three pass dry back, 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.

Location: 5098 Oaklawn Drive, Cincinnati, 45227, Ohio A 3-pass firetube boiler design consists of three sets of horizontal tubes, with the stack outlet located on the rear of the boiler. A downdraft design keeps the cooler water from having an effect on the hot surfaces within the boiler.

The FT Firetube Boilers are our economical direct fired, two pass dry back boilers. The burner's flame travels down the firetube and enters the inversion chamber. The exhaust gases then travel from the inversion chamber through the combustion tubes and exit the boiler through the exhaust stack.