Throttle valve type V251 PVDF

  Datasheet (PDF)

Manufactured by Georg Fischer, the SYGEF Standard Throttle valve type V251 is an advanced thermoplastic throttling valve engineered for the precise manual regulation and balancing of aggressive chemicals, high-purity liquids, and deionized water. Fabricated entirely from high-grade polyvinylidene fluoride (PVDF) and fitted with chemically resilient FKM elastomeric seals, the valve delivers exceptional resistance against concentrated mineral acids, strong oxidizers, organic solvents, and corrosive process streams. Designed for direct integration into metric piping systems via heat socket fusion sockets, the unit spans sizes from d16 up to d63 mm (DN10 to DN50, equivalent to 3/8 inch through 2 inch pipelines) with a nominal pressure rating of PN10 (10 bar). Operating across a continuous service temperature span of -20 degrees C to 140 degrees C, the valve features an ergonomically designed manual rotary adjustment knob that smoothly modulates internal cross-sectional aperture area to maintain stable, finely throttled flow rates. The injection-moulded body guarantees an exceptionally smooth internal surface finish of Ra ≤ 0.5 µm to inhibit particle accumulation, bacterial adhesion, and biofilm formation in sanitary or high-purity fluid circuits. Produced under rigorous clean manufacturing standards without silicone or lubricating oils, the assembly meets stringent international regulatory benchmarks including FDA 21 CFR 177.2510, USP 25 Class VI physiological non-toxicity, EU 10/2011, DIBt, ASME BPE, and FM-4910 flammability criteria, ensuring maximum process integrity across semiconductor fabrication, microelectronics, pharmaceutical processing, water sanitisation, and aggressive industrial chemical conveyance.