ARI ZESA®/GESA® NEXTG3N
Your Benefits in Detail
OPTIMISED FLOW
Due to the optimised disc design, leading to a shorter outlet section.
OPTIMISED SAFETY
Due to the polygon connection, stiffer disc and blow-out protection.
OPTIMISED EFFICIENCY
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.
THE NEW GENERATION WITH MANY ADVANTAGES
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
INNOVATIVE & FORM-FITTING
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.
BENEFITS FOR YOU
- 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