Separating Funnel, Pear Shape, Rotaflow Stopcock

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GISCOM Pear-Shaped Separating Funnel with Rotaflow Stopcock is a precision liquid-liquid extraction vessel designed for reliable phase separation of immiscible liquids in chemical, pharmaceutical, environmental, and academic laboratories. Its globe/pear geometry provides fast and efficient settling, while the screw-type Rotaflow stopcock ensures smooth, leak-free drainage. Engineered for durability, chemical resistance, and operational safety, this funnel is essential in workflows involving solvent extraction, purification, and analytical sample preparation.

Key Features

• Pear/Globe-Shaped Design for improved phase clarity and faster separation.
• High-Precision Rotaflow Stopcock offering controlled drainage, smooth rotation, and excellent leak resistance.
• Manufactured from Borosilicate Glass 3.3, ensuring superior thermal and chemical durability.
• Complies with ISO 4800 Standards, ensuring global laboratory compatibility.
• Supplied with a PP Stopper, lightweight, chemically inert, and easy to clean.
• Thick, Even-Wall Construction for long operational life and high mechanical strength.
• Clear, Permanent Graduations for accurate, repeatable measurements.
• Corrosion-Resistant Components suitable for a wide range of organic and aqueous solvents.
• Leak-Proof Assembly with screw-type fittings for secure operation during shaking and mixing.

Material Specifications

• Material: High-grade Borosilicate Glass 3.3 (ISO 3585 compliant)
• Thermal Properties: Low thermal expansion coefficient, excellent resistance to thermal shock Suitable for autoclaving and controlled heating
• Chemical Resistance: Highly resistant to acids, alkalis, organic solvents, and corrosive vapours. Non-porous surface prevents contamination and ensures sample integrity
• Mechanical Properties: High strength and scratch resistance. Maintains clarity and structural stability over long-term use

Technical Specifications

• Available Capacities: As per the standard size table
• Stopcock Type: Screw-type Rotaflow stopcock. Chemically resistant, smooth-action key
• Stopper: A Polypropylene (PP) stopper is included. An optional glass stopper is available on request
• Graduations: Durable, easy-to-read markings for precise volume reference
• Tolerance & Accuracy: Manufactured with controlled calibration tolerances as per international glassware standards
• Accessories Included: PP stopper, Rotaflow stopcock (assembled)

 Handling & Precautions

• Safe Use: Ensure the stopper and stopcock are firmly secured before shaking. Hold the stopper during mixing to prevent accidental opening
• Cleaning: Rinse immediately after use to prevent residue buildup. Compatible with standard laboratory glassware detergents. Avoid abrasive cleaning materials
• Autoclaving / Temperature Limits: Autoclavable at standard sterilisation cycles. Remove the PP stopper before autoclaving. Avoid sudden temperature shocks to prevent stress fractures
• Dos: Lubricate the Rotaflow stopcock when required. Inspect for chips or cracks before each use. Store vertically to protect the stem
• Don’ts: Do not overtighten the screw stopcock. Do not subject the funnel to open flame or extreme heating
• Best Practices: Air-dry thoroughly before storage. Maintain regular stopcock cleaning to ensure smooth operation

Applications

• Organic Chemistry & Solvent Extraction
• Pharmaceutical and Biopharmaceutical Labs
• Environmental Analysis: Water, soil, and effluent extraction
• Quality Control / Quality Assurance Testing
• Chemical Synthesis & Purification Procedures
• Academic Laboratory Training and Demonstrations
• Biotechnology Sample Preparation

This funnel supports reliable separation of immiscible liquids, washing steps, and purification stages essential across R&D, industry, and analytical environments.