Glass Key Stopcock, for Burette

Key Features

• Precision-ground glass key ensures smooth, controlled, and leak-free liquid flow
• High accuracy ideal for analytical chemistry, titrations, and volumetric measurements
• Excellent chemical resistance to acids, alkalis, and common laboratory reagents
• Straight-bore design minimises flow restriction and enhances control
• Manufactured with strict dimensional tolerance for consistent sealing performance
• Fire-polished glass surfaces reduce wear and improve long-term usability
• Compatible with most standard burette models (interchangeable design)
• Autoclavable, reusable, and easy to clean

Material Specifications

• Material: High-grade Borosilicate Glass 3.3
• Thermal Properties:
   Very low coefficient of thermal expansion (3.3 × 10⁻⁶/K)
   High resistance to sudden temperature changes
• Chemical Properties:
  Superior resistance to corrosive chemicals and aggressive laboratory reagents
• Mechanical Properties:
  High-dimensional stability
   Precisely ground surfaces for optimal fit and sealing
• Standards Compliance:
  Manufactured according to international ISO/DIN specifications for interchangeable laboratory glassware

Technical Specifications

• Available Sizes:
  As per the standard size table
• Design Type: Straight-bore, solid glass stopcock
• Tolerance: High-precision grinding ensures tight sealing and accurate flow control
• Calibration:
  No additional calibration required; grinding accuracy ensures optimal function
• Accessories:
   Optional PTFE key grease
   Replacement keys available

Handling & Precautions

• Apply a light film of suitable stopcock grease to ensure smooth operation
• Avoid abrupt temperature changes to prevent thermal shock
• Clean using mild detergents or non-abrasive laboratory cleaning solutions
• Rinse thoroughly with distilled water before and after use
• Autoclavable; avoid mechanical stress during sterilization.
• Do not force the key if resistance is felt. Clean and re-lubricate before use
• Store in a clean, dry environment to prevent sticking or surface wear

Applications

• Ideal for analytical chemistry laboratories performing routine titrations
• Widely used in:
   Pharmaceutical and chemical QC/QA labs
   Research institutes, biotechnology centers, and university laboratories
   Food and beverage testing labs
   Environmental testing and water analysis facilities
• Essential for burettes used in:
   Acid-base titrations
   Redox and complexometric titrations
   Volumetric analysis requires high accuracy