UNICAL ELLPREX Pressurized Steel Boiler with reversed flame

Pressurized steel boiler for gas, oil or heavy – oil pressure jet burners, with floating furnace from the model 730 up to the model 7000

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Reversed flame combustion chamber
Elliptic boiler body up to the model 970 kW
Highly condensate resistant thanks to:
– Misalignment of the furnace against the outer shell
– Patented fin effect on the welding seams of pipes onto the rear tube plate
Silent operation thanks to low counter pressure on smoke side
High mechanical resistance thanks to floating furnace (for the models 730 to 7000 the furnace, welded only to the front tube plate, is free to dilatate)
Anti-condensing helicoidal turbulators
Heat losses reduction, due to the strong insulation (80 mm) with rock wool of the boiler body and (up to the mod. 970), to the ceramic fibre insulation on the door (- 30% of radiation losses)
Adjustable door with double opening (left and right)
Approval as boiler with ranged output
External panel board with mechanical control and safety thermostats (as an optional extra an outer compensator can be supplied)
Easy installation
Construction according to the EN 303, part 1.
Maximum Working Pressure: 6 bar; (for models 1100÷4000 it is possible, under specific request, to provide a MWP up to 10 bar)
Two bulb holders, capable to accommodate 3 bulbs each

Additional information


Output Range

from 340 to 7000 kW

Working Temperature

minimum return temperature 55°C

Operation with

gas or oil fired pressure jet burners


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