Description
| Catalogue No. | Size | Bore (mm) |
| 11033/1 | 12.5 | 2.5 |
| 11033/2 | 14.5 | 4.0 |
| 11033/3 | 18.8 | 6.0 |
| 11033/4 | 24.0 | 8.0 |
The MEDILAB Straight Bore PTFE Key Stopcock is a precision-engineered flow-control component designed for use in laboratory glassware systems requiring smooth, accurate, and contamination-free regulation of liquids or gases. Manufactured from premium borosilicate glass 3.3 and equipped with a chemically inert PTFE key, it ensures reliable performance in research, analytical, chemical, and industrial applications. Its straight-bore design enables unobstructed flow, making it essential for controlled transfer, drainage, and reaction-setup operations.
Key Features
- Straight-Bore Flow Path: Provides unimpeded, uniform flow—ideal for precise control of liquids and gases.
- PTFE Key Construction: Offers exceptional chemical resistance and ensures effortless, leak-free operation.
- Interchangeable Design: Compatible with standard laboratory glassware setups and joint systems.
- High Durability: Borosilicate glass 3.3 resists thermal shock, mechanical stress, and corrosive chemicals.
- Smooth Operation: Low-friction PTFE ensures easy opening/closing even in high-temperature or reactive environments.
- Leak-Proof System: Tight sealing performance for sensitive experiments requiring contamination-free operation.
- Ergonomic Grips: Red end caps allow comfortable handling and precise control during adjustments.
- Autoclavable Components: Suitable for sterilisation in laboratory and GMP workflows.
Material Specifications
- Glass Type: Borosilicate Glass 3.3
- PTFE Key: Virgin PTFE, resistant to acids, alkalis, solvents, and high temperatures
- Thermal Properties: Excellent thermal shock resistance, low expansion coefficient (~3.3 x 10⁻⁶/K)
- Chemical Resistance: Both glass and PTFE are inert to most laboratory reagents. Non-porous surfaces prevent cross-contamination
- Mechanical Properties: High-dimensional stability, smooth internal finish for consistent flow
- Standards Compliance: Conforms to major international norms (ISO / DIN compatible)
Technical Specifications
- Available Bore Sizes: Multiple straight-bore diameters depending on application (custom sizes available).
- Dimensions: Precision-ground glass tubing with standard fitting lengths.
- Tolerance: Tight production tolerances ensure compatibility with standard glassware assemblies.
- Calibration: Not applicable (mechanical valve component).
- Accessories Included: Standard PTFE key and end caps.
Handling & Precautions
- Safe Use: Avoid excessive torque on the PTFE key. Ensure proper alignment before turning to prevent wear.
- Cleaning Instructions: Suitable for standard detergents, warm water, and ultrasonic cleaning. Do not use abrasives on glass or PTFE surfaces.
- Autoclaving Guidance: PTFE and borosilicate components are autoclavable. Avoid extreme, sudden temperature variations to prevent stress fractures
- Do’s & Don’ts: Do: Lubricate lightly with compatible grease if increased resistance occurs. Do: Inspect the key and barrel regularly for wear. Don’t: Expose PTFE to open flame or excessively high dry-heat conditions.
- Best Practices: Store in padded containers when not in use. Operate gently to maximise service life.
Applications
- Chemical Laboratories: Precision flow regulation in reaction setups, filtrations, and transfer operations.
- Pharmaceutical QC/QA: Controlled dispensing of solvents, buffers, and test solutions.
- Biotechnology Research: Reliable component in fluid handling lines and culture systems.
- Analytical & Academic Labs: Ideal for titration assemblies, distillation lines, and student training labs.
- Industrial R&D: Suitable for pilot plants, process development, and controlled material handling.
- General Laboratory Operations: Ensures safe, precise manipulation of liquid/gas streams in everyday workflows.
