The tube diameters are chosen judiciously to prevent any choking of the lines by the carbon soot being carried by the flue gas. The shell is provided with the necessary maintenance hole for waterside cleaning and maintenance.
Two feed pumps are provided, one of which will generally work and the other on standby. There is sufficient steam space in the shell to ensure good-quality steam.

Highest efficiency: A water-cooled wet back rear wall increases heat utilization and reduces radiation losses in the boiler. Maintenance and servicing costs are minimal as no additional brickwork is required in the flame tube. Depending on the fuel used, some models, especially developed heat exchangers (economizers), can be combined with all boiler types to boost further the efficiency of the boiler and the entire system.

• The average water level is kept well above the last row of the tubes, providing enough margin. This ensures the safety of the boiler tubes.
• An on-off Mobrey-type water level controller is provided, which would control the water level between two set points. A fusible plug is provided for additional safety.
• Boiler door the large boiler door significantly simplifies cleaning of the combustion chamber, 2nd and 3rd passes. The unique construction of the hinge makes the boiler door easy to open. With its optimum heat insulation, the boiler door helps reduce heat losses from the boiler to a minimum.