Glass Key Stopcock

The GISCOM Glass Key Stopcock is a precision-engineered straight-bore valve designed for controlled flow regulation in laboratory glassware systems. It enables accurate opening and closing of liquid and gas pathways in distillation setups, vacuum lines, filtration assemblies, and custom glass apparatus. Manufactured from high-quality Borosilicate Glass 3.3, this stopcock ensures thermal stability, chemical durability, and long-term performance essential for demanding scientific and industrial applications.

Key Features

• Precision-ground glass key for smooth, leak-free operation
• Excellent chemical resistance against acids, solvents, and corrosive reagents
• High thermal stability for use in heating, cooling, and vacuum applications
• Straight bore design for unrestricted flow and reduced pressure drop
• Interchangeable standard taper joints for compatibility with most laboratory setups
• Reusable, easy to clean, and suitable for autoclave sterilization
• Manufactured with high dimensional accuracy for reliable sealing
• Available in multiple sizes to fit a wide range of glass apparatus

Material Specifications

• Material: Borosilicate Glass 3.3
• Thermal Properties: Low coefficient of thermal expansion (3.3 × 10⁻⁶/K), High resistance to thermal shock
• Chemical Resistance: Withstands acids, alkalis, organic solvents, and aggressive chemicals
• Mechanical Strength: Strong, durable, and suitable for high-vacuum or low-pressure systems
• Standards Compliance: Manufactured in accordance with international laboratory glassware standards (ISO / DIN) for interchangeability and performance

Technical Specifications

• Available Sizes: As per the standard size table
• Design: Straight-bore, precision-ground stopcock
• Tolerance: Manufactured to tight dimensional tolerances for optimal sealing
• Finish: Fire-polished for smooth edges and improved durability
• Accessories: Optional PTFE key lubrication. Replacement glass keys are available

Handling & Precautions

• Always ensure the key is lightly lubricated (glass stopcock grease or suitable alternative) for smooth operation
• Avoid sudden temperature changes to prevent thermal shock
• Clean with mild detergent or laboratory-grade cleaning solutions; rinse with distilled water
• Suitable for autoclaving—avoid mechanical stress during sterilization
• Do not apply excessive force when inserting or removing the key
• Store in a dry place to prevent sticking or freezing of the key

Applications

• Widely used in: Chemical, pharmaceutical, biotech, and petrochemical laboratories
   Research institutions and universities
  QC/QA laboratories
  Production, pilot-scale, and vacuum systems
• Essential for:
   Distillation and reflux assemblies
   Vacuum and gas-handling lines
   Filtration units
   Custom-built scientific apparatus requiring precise flow control