Butterfly valve - GESA | ARI | Philippopoulos s.a.
Butterfly valve - GESA | ARI | Philippopoulos s.a.

Butterfly valve - GESA | ARI

ARI-GESA® Lug Butterfly Valve

The ARI-GESA® is a soft-sealing lug-type butterfly valve with threaded holes in the body. This design allows for installation between flanges, use as a pipe-end valve, and disconnection of one side of the pipeline, which is not possible in the same way with a typical wafer configuration.

Technical Specifications

  • Diameters: DN25–500
  • Pressure: PN10 / PN16
  • Body: EN-GJS-400-15 / EN-JS1030, ductile iron
  • Disc: Stainless steel 1.4581
  • Shaft: 1.4021+QT, optionally 1.4571 up to DN300 or 1.4542 from DN350
  • Face-to-face: EN 558-1, series 20
  • Tightness: EN 12266-1, leakage rate A
  • Max Δp: 16 bar for DN25–150, 10 bar for DN200–500

Seat and Media Compatibility

Seat selection should be based on fluid, temperature, and presence of chemicals or oils.

  • EPDM: -10 to +130 °C, for cold/hot water, process water, and potable water with DVGW.
  • NBR: -10 to +80 °C, for air, inert gases, and selected technical media.
  • FPM: 0 to +150 °C, for special chemical applications; not suitable for hot water.

Installation and Operation

The GESA is installed with welding neck flanges according to DIN EN 1092-1 / 11 / B1. For slip-on flanges, the manufacturer refers to ZIVA. In end-of-line applications, safety evaluation is required, and to maintain seat tightness, use of a blind or counter flange is necessary.

Actuation

Available with lever, locking lever, manual gearbox, electric actuators ARI-OM / Deufra / Auma, or pneumatic rotary actuator AIR-TORQUE, double or single acting. Selection is based on torque, operation frequency, accessibility, and fail-close or fail-open requirement.

Frequently Asked Questions

When to choose over ZESA?
When threaded lug holes, end-of-line operation, or disconnection of one side of the network are required.

Is it suitable for flow regulation?
Primarily used as an isolation valve. Limited throttling is possible, but precise control requires Kv, opening angle, and cavitation/noise conditions assessment.

Typical Applications:
Heating, cooling, HVAC networks, process water, auxiliary industrial circuits, compressed air, and isolation lines requiring sectional maintenance.

Standard (Options)
  • DIN
Connection (Options)
  • Flanged (Lug)
Material (Options)
  • EN-JS 1030 (GGG40) Ductile Iron
Pressure Rating (Options)
  • PN 10
  • PN 16
Seat (Options)
  • EPDM
  • FPM
  • NBR
Actuator (Options)
  • Handwheel
  • Gearbox
  • Pneumatic
  • Electric

Datasheet and documents

Description

✅ Soft-sealing, maintenance-free design
✅ Excellent flow characteristics with optimized Zeta-values
✅ Double stem sealing for leak protection
✅ DVGW-certified for drinking water applications (EPDM version)
✅ Full insulation possible according to EnEV (Energy Saving Order)
✅ Wide range of actuators: manual, electric, and pneumatic

Technical Specifications

Valve Types & Configurations

  1. ARI-ZESA® (Wafer Type) – Butterfly valve with elongated eyelets
  2. ARI-GESA® (Lug Type) – Butterfly valve with threaded eyelets, suitable as pipe-end valve


Material Options

Component Material
Body EN-GJS-400-15 (Ductile Iron), EN-JS1030
Seat EPDM (-10°C to +130°C), NBR (-10°C to +80°C), FPM (0°C to +150°C)
Disc Stainless Steel 1.4581 / CuAl10Fe5Ni5-C (Optional for DN40-500)
Stem X20Cr13+QT (1.4021+QT) / X6CrNiMoTi17-12-2 (1.4571 for DN ≤ 300)


Pressure & Temperature Ratings

  • Nominal Pressure Ratings: PN6, PN10, PN16
  • Max Differential Pressure:
    • 16 bar (DN25-150)
    • 10 bar (DN200-500)
  • Flange Connections: DIN EN 1092-1
  • Leakage Test Compliance: DIN EN 12266-1 (Leakage Rate A)
  • Drinking Water Certification: DVGW (EPDM) DW-6201BR0244

Tests and Certification

DIN DVGW registration "water" for EPDM (DN25/32-500)
DIN EN 13774 (Stop valves for gas and water PN 4 till PN16)
DGRL 2014/68/EU (PED Pressure Equipment Directive)
GOST-R (Russia)

Accessories & Compatibility

Electric Actuator - with 3 positions and emergency function | Valpes | Philippopoulos s.a.
Rotary

Electric Actuator - with 3 positions and emergency function | Valpes

Valpes
Electric Actuator - with 3 positions and emergency function | Valpes
VALPES Electric Actuator with 3 Positions and Emergency Function The 3 positions + BBPR / GFS configuration provides three preset valve positions with battery-powered fail-safe return to a defined position upon power loss. This version is specified for actuators rated 25–300 Nm and includes AXMART Bluetooth for configuration and monitoring. Operation The...
View
Electric Actuator - with positioner and emergency function | Valpes | Philippopoulos s.a.
Rotary

Electric Actuator - with positioner and emergency function | Valpes

Valpes
Electric Actuator - with positioner and emergency function | Valpes
VALPES Electric Actuator with Positioner and Emergency Function The POSI-BBPR configuration integrates analog position control with battery-powered fail-safe return. It is used with electric actuators rated 25–2400 Nm for quarter-turn valves or multiturn applications, where both modulating control and a predefined fail position are required in case of...
View