Separating Funnel, Pear Shape, PTFE Stopcock

GISCOM Separating Funnel, Pear Shape with PTFE Stopcock, is a precision glassware instrument designed for efficient liquid–liquid extraction and phase separation. Its pear-shaped body promotes clean separation of immiscible layers, ensuring accurate and reliable transfers in analytical, preparative, and industrial workflows. Built for routine use in demanding laboratories, it offers exceptional chemical resistance, safe operation, and consistent performance across a broad range of applications.

Key Features

• Pear-shaped (Globe) design ensures sharper phase separation and improved clarity between immiscible liquids.
• High-quality PTFE key stopcock provides excellent chemical resistance and smooth, leak-free operation.
• Manufactured from premium Borosilicate Glass 3.3 for maximum durability and thermal stability.
• Complies with ISO 4800 standards for global laboratory compatibility.
• Supplied with a polyethene (PE) stopper offering secure sealing and safe handling of volatile reagents.
• Uniform wall thickness enhances mechanical strength and long-term durability.
• Crystal-clear transparency for easy monitoring of phase boundaries.
• Optional colour enamel printing (white/blue/amber) is available for enhanced visibility and customisation.

Material Specifications

Material: Borosilicate Glass 3.3 (DIN/ISO compliant).

Thermal Properties:

• Low thermal expansion coefficient (≈3.3 × 10⁻⁶/°C)
• High resistance to thermal shock, suitable for heating/cooling cycles

Chemical Resistance:

• Inert to most acids, organic solvents, and aqueous reagents
• PTFE stopcock provides superior resistance to aggressive chemicals

Mechanical Strength: Excellent rigidity and resistance to impact-related stress under normal laboratory conditions

Standards: Manufactured in accordance with ISO 4800, aligns with DIN and ASTM glassware norms

Technical Specifications

• Available Capacities: 50 mL, 100 mL, 125 mL, 250 mL, 500 mL, 2000 mL, and higher capacities on request.
• Design: Pear-shaped body with a long stem for controlled drainage and precise layer separation.
• Stopcock: PTFE key stopcock, non-stick, corrosion-resistant, and maintenance-free.
• Accuracy & Tolerance: Volumetric tolerances conform to international standards.
• Calibration (Optional): Available with permanent enamel graduations for process accuracy.
• Packaging: Individually packed in export-grade, shock-resistant packaging. Bulk/OEM/private-label packaging is available upon request.
• Accessories Included: PTFE key stopcock assembly stopper

 Handling & Precautions

Safe Use:

• Ensure the stopcock is fully closed before filling.
• Support the funnel securely during mixing or shaking.

Cleaning Instructions:

• Rinse immediately after use with suitable detergents or solvents.
• Avoid abrasive cleaning tools that may damage the glass surface.

Autoclaving & Heating Limits:

• Borosilicate body and PTFE stopcock are autoclavable.
• Remove the PE stopper before autoclaving.
• Avoid direct flame heating or extreme temperature shocks.

Do’s & Don’ts:

• Do inspect the stopcock for smooth movement before use.
• Do store vertically to protect the stem.
• Don’t overtighten the PTFE stopcock to avoid wear.

Best Practices:

• Keep stopcock components free of residues for optimal sealing.
• Replace worn parts promptly to maintain accuracy and safety.

Applications

• Chemical Laboratories: Solvent extractions, separations, and purification tasks.
• Pharmaceutical & Biotech: Sample preparation, QA/QC workflows, analytical separations.
• Academic & Research Institutions: Widely used in organic chemistry experiments and training labs.
• Environmental & Analytical Labs: Extraction of pollutants, sample processing, and partitioning assays.
• Ideal for phase separation, liquid purification, organic synthesis, and reagent partitioning in diverse scientific and industrial environments.