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.
Additional performance:
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Option 1 - industrial version:
- Robust and durable thanks to cast lever and metallic notched plate
- Applications: e.g. outdoor installations -
Option 2 – cold temperature version:
- For use in temperature ranges down to -20°C
- Body made from 5.3103 (EN-JS1049)
- Screws and bracket made of stainless steel
- Internal parts (stem and pivot) made of 1.4571 -
Option 3 – seawater execution:
- Liner made from seawater-resistant NBR
- Disc made from Superduplex (1.4469)
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