Rotaflow Stopcock, for Automatic Burette

The GISCOM Rotaflow Stopcock for Burettes is a precision-engineered glass valve designed to ensure smooth, controlled, and leak-free liquid dispensing in titration and volumetric analysis. Manufactured from high-quality Borosilicate Glass 3.3, it delivers exceptional chemical resistance and dimensional stability, making it ideal for routine and advanced laboratory workflows. This stopcock enhances accuracy, operational safety, and reliability in academic, industrial, and pharmaceutical environments.

Key Features

• Smooth Rotational Control for precise regulation of liquid flow in burette-based titrations.
• High Chemical Resistance suitable for strong acids, bases, and organic solvents.
• Leak-Proof Performance due to tight glass-to-glass sealing and accurate grinding.
• Durable Construction with Borosilicate Glass 3.3, ensuring long-term structural integrity.
• Universal Compatibility fits standard laboratory burettes and interchangeable glassware systems.
• Easy to Operate & Maintain, offering reliable performance even in high-frequency lab use.
• Heat & Thermal Shock Resistant—safe for autoclaving and routine sterilization.

Material Specifications

Material: Borosilicate Glass 3.3
Key Material Properties:

• High resistance to thermal shock (low coefficient of expansion ~3.3 × 10⁻⁶ /K)
• Excellent chemical durability against acids, alkalis, and solvents
• Strong mechanical hardness and long life under repeated use
• Crystal-clear transparency for visual inspection of flow and liquid purity

Complies with International Standards:

• ISO 3585 (Borosilicate Glass 3.3)
• DIN/ISO norms for laboratory glassware
• Suitable for GLP/GMP laboratory environments

Technical Specifications

• Type: Rotaflow Stopcock for Burette
• Material: Borosilicate Glass 3.3
• Joint Compatibility: Standard laboratory burette connectors
• Accuracy: Machined and ground for precise, uniform flow control
• Dimensions: Available in multiple bore sizes depending on burette design
• Temperature Resistance: Up to 200–250°C for dry heat; fully autoclave-safe
• Accessories: Optional lubricants (PTFE-free), replacement plugs (on request)

Handling & Precautions

• Use with compatible burettes only to maintain leak-free operation.
• Avoid excessive force or overtightening to prevent grinding wear.
• Clean using mild laboratory detergents; avoid abrasive materials.
• Rinse with distilled water after corrosive chemical use.
• Autoclave safely at recommended cycles; avoid direct flame contact.
• Apply suitable glass stopcock lubricant when necessary for smooth operation.
• Store in padded compartments to prevent breakage.

Applications

• Analytical & Research Laboratories: Titration, volumetric analysis, routine measurement.
• Pharmaceutical & Biotechnology: QC/QA liquid dispensing, reagent handling, and assay preparation.
• Chemical & Petrochemical Industries: Precision burette operations in testing and formulation labs.
• Academic & University Labs: Teaching, training, and experimentation modules.
• Environmental & Food Testing Labs: Standardized chemical analysis and sample preparation workflows.

The Rotaflow Stopcock plays a critical role in ensuring accurate and controlled delivery of reagents—vital for obtaining consistent analytical results.