ISORIA 20/25 Butterfly valve

Butterfly valve ISORIA 20/25

Centred-disc butterfly valve with ISO 5211 compliant square shaft end, sealed by elastomer liner, with lever or manual gearbox, pneumatic, electric or hydraulic actuator. Semi-lug body (T2), full-lug body (T4) or U-section body with flat faces (T5). Body types T2, T4 and T5 are suitable for downstream dismantling and dead-end service with counterflange. Connections to EN, ASME, JIS.
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Main Applications

  • Cooling circuits
  • Seawater desalination/reverse osmosis
  • Flue gas desulphurisation
  • Paper industry / pulp industry

Technical Data

Nominal pressure
PN 20, PN 25
Max. nominal size
DN 1000
Maximum allowable fluid temperature
200 °C

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  • The spherical contact between valve disc and liner ensures durable and permanently tight shut-off.
  • Splined or keyed connection between shaft and valve disc: dry shaft, no contact with fluid handled
  • Sealing to atmosphere is ensured even when the actuator has been removed.

Technical Data

Shut off/control flow
Connection type
Installation between flanges,
Design concept Drive
With electric actuator,
With handwheel,
With pneumatic actuator,
Casing material
EN-GJS-400-15/A536 GRADE 60-40-18
Nominal pressure
PN 20,
PN 25
Max. nominal size
DN 1000
Min. nominal size
DN 32
Maximum allowable fluid temperature
200 °C
Minimum allowable fluid temperature
-10 °C
Valve body type
Semi-lug type,
Full-lug type, flat faces,
Full-lug type, raised faces,
U-shaped body, flat faces