The MEDILAB Rotaflow Stopcock is a precision-engineered flow-control valve designed for highly accurate liquid transfer and shutoff in laboratory glassware assemblies. Featuring a robust Borosilicate Glass 3.3 body and a chemically inert PTFE key, it ensures smooth, leak-free operation even under demanding chemical conditions. This stopcock is widely used in analytical, research, and industrial environments where precise valve control and durability are essential.

Key Features

• Precision PTFE key ensures smooth, frictionless rotation and precise flow regulation
• High chemical resistance suitable for aggressive acids, solvents, and corrosive reagents
• Borosilicate Glass 3.3 body offers exceptional thermal and mechanical stability
• Straight-bore design provides optimal flow efficiency and minimizes dead volume
• Leak-free sealing ensures clean and reliable operation in analytical procedures
• Interchangeable design fits standard laboratory glassware assemblies
• Color-coded cap for easy identification and enhanced handling
• Autoclavable and reusable, offering long-term cost efficiency

Material Specifications

• Body Material: Borosilicate Glass 3.3
   Low thermal expansion (3.3 × 10⁻⁶/K)
   High resistance to heat shock
   Excellent chemical durability
• Valve Key: High-purity PTFE
   Non-reactive and non-wetting
  Superior resistance to chemicals and solvents
• Standards:
   Manufactured in accordance with ISO and DIN standards for interchangeable laboratory glassware

 Technical Specifications

• Available Sizes: Multiple bore sizes and lengths to suit various laboratory setups (available upon request)
• Design: Straight-bore Rotaflow mechanism with PTFE precision key
• Tolerance: High-precision machining ensures accurate sealing and smooth operation
• Calibration: Not required; PTFE key provides automatic uniform sealing
• Packaging:
   Individually wrapped for dust and scratch protection
   Packed in shock-proof export-grade cartons
• Accessories Included:
  PTFE key installed. Optional replacement PTFE keys available

Handling & Precautions

• Rotate gently; avoid applying excessive force to the PTFE key
• For cleaning, use mild detergents or suitable solvent-based cleaners
• Rinse thoroughly with distilled water after each use
• PTFE key can be easily removed for cleaning and reassembled carefully
• Autoclavable at standard laboratory sterilization temperatures
• Avoid using abrasive cleaning tools that may scratch the glass surface
• Do not expose the stopcock to sudden temperature changes to prevent thermal shock

 Applications

• Ideal for use in:
   Chemical synthesis setups
   Filtration assemblies
   Distillation apparatus
   Reaction systems
   Volumetric and titration equipment

• Commonly used in:
  Pharmaceutical QC/QA labs
  Chemical and petrochemical industries
   Biotechnology and life science research centers
   University and institutional laboratories
   Environmental testing labs

• Plays a crucial role in ensuring accurate liquid handling and secure flow control during sensitive procedures

Why Choose MEDILAB

• 35+ years of expertise in manufacturing precision laboratory glassware
• Trusted by customers in 40+ countries worldwide
• Export-quality production with stringent in-house quality control
• OEM and private labeling services available for global distributors
• Products engineered for durability, accuracy, and long-term reliability
• Strong packaging standards designed for safe global transportation
• Proven commitment to consistency, customer support, and innovation in laboratory solutions