Overview

The G41F46-16C lined fluoroplastic weir-type diaphragm valve is a precision diaphragm-type shut-off control valve specifically engineered for highly corrosive fluid systems. This series covers nominal bore sizes from DN15 to DN250, with pressure ratings ranging from PN0.6 to PN1.6MPa, and features flanged end connections for standardized integration with corrosive media pipelines across chemical, petrochemical, metallurgical, pharmaceutical, and water treatment industries. The valve incorporates a weir-type flow path design, utilizing a flexible diaphragm that is pressed against the valve seat to achieve sealing. The diaphragm completely isolates the media from the bonnet, stem, and all moving parts, delivering true zero-leakage sealing performance. The valve can be actuated via handwheel, pneumatic actuator, or electric actuator, making it adaptable to a wide range of demanding corrosive shut-off applications. The valve body is manufactured from high-quality cast steel (WCB) substrate, lined with high-performance FEP (F46) or PTFE (F4) anti-corrosion layer. Combined with a specially engineered diaphragm sealing system, it maintains exceptional sealing integrity and fatigue resistance across a service temperature range of -20°C to 150°C, establishing itself as an ideal core component in modern anti-corrosion fluid control engineering for handling high-purity media, highly corrosive fluids, and media containing suspended particles.

Product Image:G41F46-16C Lined Fluoroplastic Weir-type Diaphragm Valve

Feature

Wide Size Coverage and Diverse Actuation Options: Tailored for DN15 to DN250 pipelines, supporting pressure ratings from PN0.6 to PN1.6MPa, with three actuation options including manual, pneumatic, and electric, perfectly suited for diverse corrosive fluid control requirements both domestically and internationally.

Zero-Leakage Diaphragm Sealing Design: Featuring an innovative weir-type diaphragm sealing configuration, the elastic diaphragm completely isolates corrosive media from the bonnet, stem, and all moving parts, fundamentally eliminating external leakage risks and achieving true zero-leakage sealing. This design is particularly well-suited for high-purity media, highly corrosive fluids, and demanding services involving suspended particles.

Superior Corrosion Resistance: All internal wetted parts are fully lined with F46 (FEP) or F4 (PTFE), offering exceptional chemical inertness. The valve reliably withstands prolonged exposure to strong acids (sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, aqua regia), strong alkalis, organic acids, organic solvents, and various highly corrosive gases and liquids, without degradation even under extreme chemical conditions.

Stable Performance Across a Wide Temperature Range: Through dedicated thermodynamic and sealing pair matching design, the valve operates reliably across a service temperature range of -20°C to 150°C, maintaining stable open/close performance and sealing integrity in complex environments involving alternating cryogenic and medium-temperature corrosive media.

High-Strength Cast Steel Body: The valve body is manufactured from premium cast steel (WCB) material, offering high strength and excellent rigidity to withstand system stresses and thermal cycling shocks in medium-to-high pressure pipelines. This makes it particularly suitable for corrosive services involving steam tracing and significant pressure fluctuations.