The All Glass Filter Holder -47 mm, Filtration Assembly (with Silicon Stopper) manufactured by Edulabs offers a reliable, flexible solution for routine analytical filtration, HPLC solvent purification, and particulate determination. Designed to accommodate 47 mm membrane filter discs, this system combines high-grade borosilicate glass construction with a flexible silicon stopper mounting mechanism, allowing easy adaptation to various receiving flasks and vacuum manifolds.

The assembly operates under vacuum pressure to accelerate liquid filtration through microporous membrane media. The solution contained in the upper 300 ml funnel passes through the filter membrane, supported evenly by a porous fritted glass disc. A key functional highlight is the engineered base geometry featuring an integral vacuum connection positioned above the filtrate drip stem. This specific alignment ensures liquid droplets drop directly into the receiving flask without splashing into or contaminating the vacuum draw tube.

Constructed entirely from premium BORO 3.3 Borosilicate Glass, the apparatus offers maximum chemical stability, making it resilient against aggressive organic solvents, acidic solutions, and basic reagents commonly used in analytical laboratories. The silicon stopper provides a tight, resilient seal within standard flask necks, reducing setup time while maintaining leak-proof vacuum integrity. The robust anodized aluminum spring clamp provides uniform sealing pressure across the glass rim, preventing peripheral bypass.

Ideal for analytical research laboratories, pharmaceutical quality testing, and environmental monitoring facilities, the Edulabs Silicon Stopper Filtration Assembly ensures excellent sample purity, protection against cross-contamination, and continuous reliability. The unit can be easily dismantled for thorough cleaning, chemical decontamination, or heat sterilization, providing long service life under demanding laboratory protocols.

Key Features

• Constructed from durable BORO 3.3 Borosilicate Glass for superior chemical resistance.

• Fitted with a high-grade silicon stopper for secure mounting on vacuum receiving flasks.

• Integral vacuum connection situated above filtrate drip stem prevents vacuum line contamination.

• Porous fritted glass base supports 47 mm membrane filters evenly for high flow efficiency.

• Includes a 300 ml borosilicate glass funnel with clear graduation marks.

• Heavy-duty anodized aluminum spring clamp guarantees leak-proof, uniform clamping.

• Designed for HPLC mobile phase filtration, solvent clarification, and degassing.

• Excellent thermal tolerance and resistance to aggressive organic chemicals and acids.

• Simple modular assembly for fast filter disc replacement and easy cleaning routines.

• Fully autoclavable components ensuring strict compliance with laboratory hygiene standards.

Technical Specifications

Available Models

Applications

• HPLC mobile phase preparation, degassing, and solvent clarification.

• Vacuum filtration of aqueous solutions, organic solvents, and buffer solutions.

• Particulate analysis and gravimetric testing in environmental water testing.

• Microbiological sample preparation and filtration procedures.

• Clarification of biological samples, tissue culture media, and enzymes.

• Removal of suspended solids in food, beverage, and spirit quality control.

• Chemical purification routines in pharmaceutical research facilities.

• Analytical sample preparation prior to spectroscopic and chromatographic testing.

• Solvent recovery and particulate cleanup in organic synthesis laboratories.

• Educational laboratory demonstrations in separation science and filtration dynamics.

Note

Edulabs also offers a comprehensive range of laboratory glassware, laboratory plasticware, laboratory chemicals, laboratory instruments, laboratory equipment, scientific apparatus, educational laboratory equipment, and customized laboratory solutions for educational institutions, research laboratories, pharmaceutical industries, healthcare facilities, biotechnology laboratories, environmental testing laboratories, food and beverage laboratories, and industrial quality control laboratories. Contact Edulabs for bulk orders and OEM requirements.