Funnel Filtering

The GISCOM Funnel Filtering is a precision-crafted laboratory funnel made from premium Borosilicate Glass 3.3 for efficient and reliable filtration processes. Designed with a 60° bowl angle and a smooth, narrow stem, it ensures optimal flow control and compatibility with standard filter papers. This funnel is essential for accurate sample transfer, clarification, and separation in research, industrial, and analytical environments.

 Key Features

• Made from Borosilicate Glass 3.3: Exceptional resistance to chemicals, thermal shock, and mechanical stress.
• 60° Bowl Angle: Ensures efficient filtration and correct seating of filter papers.
• Smooth Surface Finish: Allows uniform flow without sample retention.
• High Transparency: Easy visual monitoring of fluid levels and filtration progress.
• Compliance with DIN ISO 4798 & USP Standards: Guarantees international dimensional and quality consistency.
• Uniform Wall Thickness: Ensures durability and reduces breakage risk.
• Straight, Long-Stem Design: Improves flow control and minimises splashing.
• Autoclavable & Reusable: Suitable for repeated sterilisation and long-term lab use.

 Material Specifications

• Primary Material: Borosilicate Glass 3.3
• Properties: High thermal resistance (low thermal expansion coefficient). Excellent chemical stability against acids, alkalis, and solvents. Mechanical strength suitable for routine laboratory operations.
• Standards Compliance: Manufactured according to standards for filtering funnels. Meets requirements for laboratory glassware purity and performance.

Technical Specifications

• Available Diameters: As per the standard size table
• Bowl Angle: 60°, ideal for circular filter papers.
• Stem Length: Optimised for common lab setups; varies by funnel size.
• Tolerance: High dimensional accuracy for consistent fit with filter media.
• Calibration: Not applicable (volumetric accuracy not required).
• Accessories Included: None required; funnel supplied, ready for immediate use.

 Handling & Precautions

• Handle with care to avoid impact or surface scratches.
• Clean immediately after use with mild detergent or standard lab cleaning agents.
• Suitable for autoclaving; avoid sudden extreme temperature changes to prevent thermal shock.
• Do not use with strongly alkaline solutions at high temperatures for prolonged periods.
• Ensure the stem is clear of debris before filtration.
• Avoid using metal tongs; use padded or silicone-coated holders when hot.