Natural Circulation Steam Boiler 

Low-maintenance special steam boiler with
operating pressures of 80 and 95 bar 

A special steam boiler for highest temperatures is required?

ZAFA Natural Circulation Steam Boiler

Natural circulation steam boilers or also called natural circulation steam generators are available in different sizes with capacities from 200 to 2900 KW and operating pressures of 80 and 95 bar in vertical design.

ZAFA natural circulation steam boilers for high-pressure steam are built on the basis of the natural circulation boiler in three-pass design. Steam boilers of this series can functionally only be operated in vertical design, as they operate in a hermetically closed system without a feedwater pump. The prerequisite for this is 100% condensate return and a consumer (heat exchanger) which must be installed above the boiler unit.

Once treated, the boiler water serves as the heat transfer medium. It is circulated as steam and condensate and does not have to be constantly renewed as is the case with conventional steam systems, which largely eliminates the need for ongoing maintenance and thus significantly reduces operating costs.

Manufacturing takes place exclusively at ZAFA in accordance with the European Pressure Equipment Directive 2014/68/EU, the AD-2000 and EN 12952 regulations with TÜV approval (German Certification Authority) and CE mark.



Our product portfolio - Natural Circulation Steam Boiler

Type

NKD

  • 200
  • 300
  • 400
  • 500
  • 600
  • 700
  • 800
  • 1000
  • 1200
  • 1500
  • 1600
  • 1800
  • 2000
  • 2500

Dampf-leistung

kg/h

  • 577
  • 866
  • 1155
  • 1443
  • 1732
  • 2021
  • 2310
  • 2887
  • 3465
  • 4331
  • 4620
  • 5197
  • 5775
  • 7219 

Categorie 2014/68/EU

 

  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  • IV
  •  IV

Operating Pressure

bar

  •  80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95
  • 80 / 95

Heat
Output

KW

  • 233
  • 348
  • 464
  • 580
  • 696
  • 814
  • 928
  • 1163
  • 1395
  • 1744
  • 1860
  • 2093
  • 2326
  • 2907 

Capacity Lt/Pressure


  •  150 / 80 
  • 207 / 80
  • 257 / 80 
  • 315 / 80
  • 366 / 80
  • 424 / 80
  • 477 / 80
  • 588 / 80
  • 716 / 80
  • 893 / 80
  • 941 / 80
  • 1067 / 80
  • 1181 / 80
  • 1464 / 80

Subject to changes




Natural Circulation Steam Boiler  - Additional modules

Expansion tank

Pressure tank in horizontal cylindrical design with dished end. Connections for steam inlet, steam outlet, condensate outlet, level electrodes, magnetic flap switch, inspection openings, sampling cooler and two saddle feet. Design, construction and manufacture in accordance with the Pressure Equipment Directive. All connections in flanged design. Insulation with non-combustible mineral wool and sheet metal cladding of aluminum stucco (end faces with straight bottoms).

Filling pumps

Three-plunger piston pump driven and mounted on a common steel bracket. The pump can be used for filling as well as for refilling the plant.

Contact us for a non-binding offer !

We are looking forward to help you.