GEMÜ Butterfly Valves – Series 490, 491, 497, 498

• Nominal Size: DN 25 – DN 1200

• Operating Pressure: 0–10 bar

• Operating Temperature: -20°C to +200°C

• Application Area: Industrial shut-off and control of corrosive fluids

Valve Materials:

• Body Options:
  – Ductile iron EN-GJS-15 (GGG40), epoxy-coated (120 µm)
  – Stainless steel 316L
  – Duroplast (VE-CF)
  – Steel S355J2G3

• Disc Options:
  – Stainless steel 1.4469
  – Stainless steel 1.4404 (316L)
  – PFA-coated stainless steel
  – Titanium

Seal Materials:
TFM/FKM, PTFE/FKM, PTFE/Silicone

Connections: PN 10/16 flanged
Body Configuration: Wafer / LUG / U-section

Actuation Types:

• 490: Bare shaft (no actuation)

• 491: Pneumatic actuator – Normally Closed / Normally Open / Double-acting

• 497: Manual operation

• 498: Electric actuator