The Wincom Buchner Funnel is a premium laboratory filtration apparatus designed for high-efficiency vacuum or suction filtration workflows. Manufactured from high-purity, chemically inert porcelain, it features a specialized cylindrical bowl with a flat, perforated filter plate. When paired with a vacuum filtration flask and a matching filter paper disc, this funnel utilizes negative pressure to draw liquids through rapidly, leaving behind a clean, dry solid residue. It is an indispensable tool specified for chemical synthesis, crystallization processes, and analytical testing laboratories.

Technical Specifications

• Equipment Type: Heavy-Duty Perforated Buchner Funnel

• Material Composition: High-purity, thermal-shock resistant laboratory porcelain (Alumina-Silicate ceramic)

• Surface Treatment: Fully glazed internal and external surfaces (except for the rim and the connecting stem tip)

• Plate Architecture: Integrated flat perforated plate with evenly distributed filtration holes

• Filter Paper Compatibility: Matches standard filter paper diameters (e.g., 55mm, 70mm, 90mm, 110mm, up to 150mm or larger depending on size variant)

• Stem Configuration: Sturdy, thick-walled cylindrical stem with a tapered end for a tight rubber collar/stopper seal

• Chemical Endurance: Exceptional resistance to hot concentrated acids, corrosive alkalis, and strong organic solvents

Key Features

• Accelerated Vacuum Efficiency: The flat perforated plate is engineered to distribute suction force evenly across the entire surface of the filter paper, preventing tearing and ensuring ultra-fast liquid separation under negative pressure.

• Absolute Chemical Inertness: Built from premium laboratory-grade ceramic that does not react with aggressive chemicals, volatile solvents, or concentrated reagents, ensuring zero sample contamination.

• High Structural Durability: The thick-walled porcelain design provides immense structural strength, safely withstanding high-pressure vacuum differentials without cracking or buckling.

• Ultra-Smooth Glazed Finish: Features a highly polished glaze that prevents solid precipitates and crystals from sticking to the side walls, enabling effortless residue harvesting and quick cleaning.

• Universal Adapter Fitting: The precision-molded stem tapers smoothly to fit standard rubber filtration cones, gaskets, or neoprene adapters, establishing an airtight seal with standard vacuum flasks.

Primary Applications

• Recrystallization Harvesting: Isolating and collecting pure synthesized crystals from hot mother liquors after chemical reactions.

• Precipitate Filtration & Drying: Separating heavy or fine chemical precipitates from liquid mediums under suction to reduce dry-oven preparation times.

• Wastewater & Environmental Analysis: Filtering suspended solids, sludges, and particulate matters from environmental water samples for gravimetric evaluation.

• Pharmaceutical Compound Separation: Running high-volume liquid processing lines where gravity-fed funnels are too slow or inefficient for dense mixtures.