The first soft-sealing butterfly valve with 3 optimised disc designs means less turbulent flow.

DN 20 TO DN 50 – SINGLE SHAFT DESIGN

  • Lower friction and pressure losses for optimised Kvs values.
  • Optimised disc design means less turbulence and a shorter outlet section – just 2 x DN – downstream of the valve.
  • Less turbulence also has the advantage of less noise and vibration in the system.
  • Less dirt deposits.

 

3D
3D

DN 65 TO DN 200 – INNOVATIVE CURVED DESIGN

  • Lower friction and pressure losses for optimised Kvs values.
  • Optimised disc design means less turbulence and a shorter outlet section – just 2 x DN – downstream of the valve.
  • Less turbulence also has the advantage of less noise and vibration in the system.
  • Less dirt deposits.
  • The curved design is protected by a utility model and as such is unique worldwide.
  • The curved design results in increased stiffness and adds stability to the entire shaft-and-disc structure.

DN 250 TO DN 600 – INNOVATIVE HEXO HONEYCOMB DISC DESIGN

  • The HEXO honeycomb disc design is protected by a utility model and as such is unique worldwide.
  • Lower friction and pressure losses for optimised Kvs values.
  • Optimised disc contour means less turbulence and a shorter outlet section – just 2 x DN – downstream of the valve.
  • Less turbulence also has the advantage of less noise and vibration in the system.
  • Less dirt deposits.
  • Weight advantage of the new disc design simplifies ­handling in the system.
  • The HEXO design results in increased stiffness and adds stability to the entire shaft-and-disc structure.
3D

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

Single Shaft Design

DN 20-50

Curved Design

DN 65-200

HEXO Honeycomb Design

DN 250-600

Standard soft-seated butterfly valve

ZESA®/GESA® NEXTG3N with HEXO Honeycomb disc design

 

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.

 

The strong Trio for Industry

Optimised for more challenging applications:
ZESA®/GESA® butterfly valves industrial version
with cast lever and metallic notched plate

ARI butterfly valves ZESA®/GESA® in industrial version combine
the advantages of the safe and robust ZIVA® industrial valve with
the innovative product features of the optimised product range.

YOUR ADVANTAGES

  • Energy efficiency: Significantly better KVS values than those of the former ZESA/GESA/ZIVA versions
  • Maximum process reliability: Shaft and disc are connected by a secure polygon
  • Optimised stability: Long service life thanks to optimised stability of the entire shaft and disc design
  • Better, corrosion-resistant coating: C3 instead of C2 coating based on DIN EN ISO 12944-5
  • Shaft end equipped with a square: The standardised connection form in accordance with ISO 5211 offers uncomplicated, subsequent installation of a control element
  • Better handling when replacing liner: Weight reduction for the large nominal sizes
  • Robust and durable for more demanding applications: Industrial version optionally with cast lever and metallic notched plate
  • Cold temperature version: Optional for temperatures down to -20°C

 

ZESA®/GESA® NEXTG3N Applications

Areas of application in HVAC (Standard version)

  • Air conditioning and cold water applications, e.g. in data centers
  • Heating systems
  • Drinking water systems
  • Heat and cooling transfer stations

Areas of application in industry (Industrial version)

  • Compressed air systems
  • Cooling loops in the process industry
  • Combined heat and power plants
  • Swimming pool technology
  • Solar thermal systems
  • Biogas plants
  • Seawater applications
  • Various industrial applications

Your Benefits with ZESA®/GESA® NEXTG3N

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.