PVDF 240 Butterfly Valve DA

  Datasheet (PDF)

The Georg Fischer SYGEF Type 240 double-acting pneumatic butterfly valve delivers automated flow control, rapid isolation, and throttling in aggressive chemical distribution systems and ultra-pure media processes. Designed in a compact wafer style for installation between metric backing flanges, this automated valve assembly combines high-purity polyvinylidene fluoride (PVDF) wetted components with an engineered double-acting pneumatic actuator. Engineered for demanding industrial environments where aggressive acids, solvents, and high-purity fluids challenge conventional materials, the SYGEF Type 240 ensures dependable quarter-turn automation across pipe diameters from d63 mm up to d140 mm.

The valve body and disc are manufactured from high-grade SYGEF PVDF, providing exceptional chemical inertness and mechanical strength across an operating temperature range of -20 to 140 degrees C. This construction resists stress cracking when exposed to halogens, concentrated acids, and demineralised water. Actuation is driven by a pneumatic double-acting (DA) mechanism enclosed in a rugged glass-fibre reinforced polypropylene (PP-GF) housing. The double-acting setup utilizes compressed air for both opening and closing strokes, delivering consistent operating torque and high operational reliability without spring fatigue.

Engineered for seamless integration into process control loops, the actuator features an integrated NAMUR interface for direct mounting of pilot solenoid valves, position feedback sensors, and control tops. A clear optical position indicator enables immediate visual inspection of disc orientation from any viewing angle. With a rapid 90-degree operating cycle completed in just 1 to 2 seconds, the valve delivers precise throttling and rapid shut-off in chemical manufacturing, pharmaceutical production, and industrial water treatment installations.