Butterfly valve 565L Lug PVDF FO pneumatic d63-315 mm

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The Georg Fischer Type 565L Lug-style pneumatic butterfly valve is an automated industrial process valve designed for demanding water treatment and chemical distribution systems. Configured with a Fail Safe to Open (FO) pneumatic actuator, the valve automatically moves to a fully open position upon loss of control pressure, ensuring critical flow pathways remain open during system emergencies. The construction pairs a high-purity polyvinylidene fluoride (PVDF) disc with an outer housing molded from glass-fiber reinforced polyamide (PA-GF), combining structural stiffness with high resistance to corrosive chemicals and aggressive media.

Engineered for reliable isolation and flow modulation across metric pipe diameters from d63 mm up to d315 mm, the valve accommodates nominal operating pressures of 10 bar or 6 bar depending on the dimension. Sealing integrity is provided by high-grade elastomer liners in EPDM or FKM, matching diverse industrial fluid compatibility requirements. The Lug design incorporates threaded inserts that enable secure mounting between standard ISO flanges, while permitting independent downstream pipe disconnection under full upstream line pressure.

Actuation performance delivers rapid response times, with an opening and closing stroke of 1 to 2 seconds across a 90 degrees operating angle. The drive assembly includes a pre-assembled switching ring designed for direct mounting of dual position feedback sensors and visual LED status indicators, facilitating seamless integration into automated process control networks. The chemically inert PVDF disc and composite body minimize overall assembly weight compared to metal valves, eliminating external corrosion risks.

The 565L series provides outstanding long-term durability in municipal and industrial water treatment installations, chemical dosing skids, and process piping. Its lightweight profile reduces pipe strain and simplifies maintenance, establishing a reliable fluid control solution manufactured by Georg Fischer for demanding industrial installations.