Borosilicate Glass Membrane Filter, Up to 500°C (CAT#: STEM-BC-2844-ZJF)

This laboratory membrane filter is constructed from high-borosilicate glass for chemically demanding sample preparation. Its glass flow path minimizes the introduction of metal ions into high-purity samples. The transparent construction allows direct observation of flow, bubbles, color changes, and particulate accumulation. Glass-fiber membranes or integrated sintered-glass plates can be selected as the filtration medium. The system can be used for gravity filtration or connected to a vacuum source for accelerated processing. Smooth inert surfaces reduce sample adsorption and support recovery of valuable or trace-level materials. High thermal resistance allows drying, heating, and selected regeneration procedures at elevated temperatures. The filter is suitable for strong acids, many organic solvents, high-purity reagents, and analytical samples, excluding incompatible chemicals such as hydrofluoric acid. Typical uses include trace-element analysis, chromatography sample preparation, gravimetric analysis, chemical clarification, and high-temperature fluid filtration.

Body material: 3.3 borosilicate glass
Filtration media: Glass-fiber membranes or sintered-glass plates
Glass-fiber membrane ratings: 0.3, 0.7, and 1.0 µm
Sintered-glass grades: G1 to G6
Approximate sintered-glass pore range: 100 to 120 µm for G1 and 1.5 to 2.5 µm for G6
Available funnel capacities: 100, 250, 500, 1000, and 2000 mL
Connection options: Standard ground joints including 40, 60, and 100 mm or flange-clamped connections
Maximum stated temperature: 500°C
Maximum instantaneous temperature difference: Less than 280°C
Recommended operating pressure: Up to 0.1 MPa
Operating modes: Gravity or vacuum filtration
Seal options: Silicone or PTFE gasket
Chemical limitation: Not suitable for hydrofluoric acid or hot concentrated phosphoric acid

Metal-free glass flow path
Broad chemical resistance
High-temperature capability
Transparent process observation
Low sample adsorption
Replaceable or reusable filtration media
Vacuum-filtration compatibility
Suitable for trace analytical work

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