GEMÜ 490

The GEMÜ 490 Edessa lined bare shaft butterfly valve provides bubble tight flow isolation for aggressive chemical applications. The GEMÜ 490 accommodates nominal sizes from DN 40 to DN 1200, regulates operating pressures up to 10 bar, and withstands media temperatures ranging from -20°C to 200°C. Key Performance Capabilities: Aggressive Media Resistance: The GEMÜ 490 uses a TFM (PTFE)/PFA liner and one piece disc/shaft, reducing permeability to prevent corrosive gas or liquid damage and lower long term component replacement costs. Reduced Actuation Wear: The GEMÜ 490 TFM seal provides cold flow properties comparable to PTFE with 25% glass fibres, preventing permanent deformation under load to ensure consistent actuation torque and extend the mechanical lifespan of automated systems. Guaranteed Flow Isolation: The GEMÜ 490 achieves EN 12266-1/P12 leak rate A bubble-tight sealing, preventing costly fluid loss and eliminating unplanned maintenance downtime caused by cross-contamination within critical chemical and water treatment lines. Safety & Compliance: Explosive Environment Security: The GEMÜ 490 secures ATEX compliance for group II, zones 0, 1, 2, 20, 21 and 22, preventing ignition risks to guarantee facility safety and continuous operation within volatile industrial zones. Emissions & Food Grade Compliance: The GEMÜ 490 achieves TA Luft and FDA (21 CFR 177.1550) conformities, ensuring plant engineers can standardise one lined valve across strict emission controlled environments and sanitary processing lines. Note: The maximum operational media temperature range depends strictly on the specific liner, disc material and liner fixing selected for the GEMÜ 490 configuration.