GEMÜ 497

The GEMÜ 497 manual butterfly valve provides bubble tight flow isolation for chemical process applications. The GEMÜ 497 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: Chemical Degradation Resistance: The GEMÜ 497 uses a TFMTM (PTFE)/PFA liner and a one piece disc/shaft, reducing permeability to prevent corrosive gas or liquid damage and lower long term component replacement costs. Manual Actuation Control: The GEMÜ 497 integrates a latching hand lever or gearbox hand wheel operator, delivering mechanical flow regulation to eliminate process downtime during manual pipeline interventions. Guaranteed Flow Isolation: The GEMÜ 497 achieves EN 12266-1/P12 leak rate A bubble-tight sealing, preventing fluid loss and eliminating unplanned maintenance downtime caused by cross-contamination within processing lines. Safety & Compliance: Explosive Environment Security: The GEMÜ 497 secures ATEX compliance for group II, zones 0, 1, 2, 20, 21 and 22, preventing ignition risks to guarantee facility safety within volatile industrial zones. Emissions & Food Grade Compliance: The GEMÜ 497 achieves TA Luft and FDA (21 CFR 177.1550) conformities, ensuring plant engineers standardise one lined manual valve across emission controlled environments and sanitary processing lines. Note: The maximum operational media temperature and pressure ranges depend strictly on the specific liner, disc material and nominal size selected for the GEMÜ 497 configuration.