Borosilicate Glass 47mm Sintered Disc / Filter Support Base

The Borosilicate Glass 47mm Sintered Disc / Filter Support Base is a critical replacement component for vacuum filtration assembly units used in analytical and biological laboratories, supplied through Apex Labs. Crafted from high-purity Borosilicate 3.3 glass, this base features an integrated sintered glass (fritted) disc that provides a stable and porous platform for 47mm membrane filters. The design includes a tapered stem compatible with a No. 8 silicone stopper, ensuring a vacuum-tight seal when fitted onto a filtering flask. Its superior chemical resistance and thermal stability make it the standard choice for HPLC solvent preparation, particulate analysis, and sterile filtration.

Product Specification & Direct Ordering

Technical Specifications

• Material Composition: Borosilicate 3.3 Glass (ISO 3585)
• Support Type: Sintered / Fritted Glass Disc
• Filter Size Compatibility: 47 mm Diameter membranes
• Effective Filtration Area: sim 9.6 cm^2
• Stem Attachment: No. 8 Silicone Stopper (Blue)
• Porosity Grade: Grade 3 (General Purpose filtration)
• Max Working Vacuum: Full Vacuum (approx. 25-29 in Hg)
• Supplier & Distributor: Apex Labs, Varanasi, Uttar Pradesh

Maintenance & Handling

• Pre-Use Cleaning: Rinse with distilled water or a mild solvent to remove any microscopic residues from the sintered disc.
• Thermal Care: Avoid rapid temperature changes; although borosilicate is resistant, gradual heating and cooling prolong the life of the fritted joint.
• Storage: Store in a dust-free environment or covered with a watch glass to keep the sintered surface clean.

Laboratory Glassware & Filtration Range

Technical Material & Performance Highlights

• High-Purity Sintered Disc: Grade 3 porosity fritted glass ensures even vacuum distribution and firm support for membranes.
• Premium Borosilicate 3.3: Exceptional resistance to chemical corrosion, thermal shock, and mechanical stress.
• Universal Compatibility: Designed for use with standard 300ml glass funnels and anodized aluminum clamps.
• Vacuum-Tight Seal: Includes a high-grade blue silicone stopper for secure attachment to 1L or 2L filtration flasks.
• Fully Autoclavable: Engineered to withstand repeated sterilization cycles at $121^\circ\text{C}$ for aseptic workflows.

Primary Sector Applications

• HPLC Solvent Prep: Filtering and degassing mobile phases to protect sensitive HPLC columns.
• Microbiology: Supporting membranes for bacterial counts and biological contamination analysis.
• Particulate Testing: Quantitative analysis of suspended solids in water and environmental samples.
• Chemical Synthesis: Removal of fine precipitates and impurities from chemical mixtures.
• Aseptic Filtration: Sterile filtration of media and buffers using $0.22\mu\text{m}$ or $0.45\mu\text{m}$ membranes.