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Pros:

  • Intuitive boiler control on SPC basis with very high transparency of operating data
  • High level of efficiency due to three-pass technology, an integrated economizer and effective heat insulation materials
  • High level of pressure consistency and steam quality even with widely fluctuating steam demand
  • Automatic start-up, standby and shutdown control SUC
  • Suitable for all burner systems
  • Pollutant reduced combustion thanks to the use of highly developed firing systems and careful matching of the best boiler and burner combination
  • Easy for maintenance – simple to inspect on both the flue gas side as well as the water side
  • Robust, reliable and unsurpassed in its durability
  • Acceptance in accordance with the European Pressure Equipment Directive – applied worldwide
  • Extremely high control range thanks to single-flame tube operation
  • Simple extension options thanks to integrated module technology
  • Simple commissioning due to pre parameterised boiler control
  • Easy wiring on site thanks to plug-in connections
Type Heat transfer medium Design Capacity in kg/hour Safety design overpressure in bar Max temperature in oC Fuel
ZFR High pressure saturated steam Three-pass flame tube/smoke tube technology 18 000 up to 55 000 up to 30 235 Oil / gas
ZFR-X High pressure superheated steam Three-pass flame tube/smoke tube technology 18 000 up to 55 000 up to 30 300 Oil / gas

Additional details

Proven for decades and still pioneering

The double-flame smoke tube boiler with separate smoke gas passages is also suitable for operation with only single firing. The three-pass principle with a rear smoke gas reversing chamber lying in the water chamber was patented in 1952. The economizer and superheater can be upgraded in simple modular construction. The dimensions of the flame tubes, smoke tube bundles, water chamber and steam chamber have optimum thermodynamics. Radiant and convection heating surfaces generate a special dynamic in conjunction with the possibility of single-flame tube operation. The fed fuel heat is transferred evenly by means of flow components mounted on the water side, and it is then converted into steam without material stress.

Modules which help you save

The modulating output regulator for 'unrestricted' single-flame or double-flame tube operation and for continuous feed water control is mandatory with the UNIVERSAL steam boiler ZFR. In order to achieve additional savings potential, we can offer you, subject to the system conditions, the following optional modules for increased efficiency:

- Speed controlled burner fan
- O2 controls
- CO controls 

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