Your Benefits in Detail


Due to the optimised disc design, leading to a shorter outlet section.


Due to the polygon ­connection, stiffer disc and blow-out protection.


Due to the optimised Kvs values and ease of servicing, enabling more compact ­systems. Can be fully insulated.

For more information about your individual benefits feel free to contact us.


For significant optimisation and a flow with less turbulence and vibration.

  • Optimised disc in three different designs (single shaft, curved, HEXO honeycomb).
  • The improved design of the liner contour ensures a firm grip inside the body, and both the disc and the liner are replaceable.
  • A wide range of appropriately certified liner materials are available for a variety of applications and temperature ranges.
  • The shaft end is designed as a square. Thanks to the standardised connection to ISO 5211, users profit from an uncomplicated design with a gearbox and either an electric or a pneumatic actuator.
  • Up to DN 200, the hollow spindle for an optional thermal gauge is standard.
  • Blow-out protection according to DIN EN 593 and API609 is provided as standard in the form of a stem lock washer, which is screwed tight to the top flange.
  • The connection between the shaft and the disc is designed as a form-fitting polygon for optimum torque transmission.
  • Special options:
    • Body made from EN-JS1049 (5.3103)
    • Chiller version down to -20°C
    • Cast lever and metal notched plate up to DN 200
    • Seawater version with NBR liner and CuAl10Ni disc
    • Special paint finishes

Polygonal Shaft-Disc Connection


The connection between the shaft and the disc is designed as a form-fitting polygon for optimum torque transmission. The disc and liner are simple to replace because the polygon is self-centring and no additional fixing pin is required. A flat surface ensures the discharging of air when the shaft is inserted into the disc, for even easier installation.


  • New polygonal connection guarantees maximum reliability.
  • Designed as a form-fitting polygon for optimum torque transmission.
  • Design rules out any notching effect.
  • Easy servicing because the liner and disc are simple to replace.


ZESA®/GESA® NEXTG3N Applications

  • Air conditioning and cold water applications, e.g. in data centres
  • Heating systems
  • Drinking water systems
  • Compressed air systems
  • Swimming pool systems
  • Solar thermal power plants
  • Biogas plants
  • Seawater applications
  • Various industrial applications