Description
| Catalogue No. | Size | Bore (mm) |
| 11037/2 | 14 | 3.0 |
| 11037/3 | 19 | 4.0 |
The MEDILAB 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:
Multiple bore diameters and key sizes (custom sizes available on request) - Design: Straight-bore, precision-ground stopcock
- Tolerance: Manufactured to tight dimensional tolerances for optimal sealing
- Finish: Fire-polished for smooth edges and improved durability
- Packaging:
Individually packed in protective medical-grade material. Bulk export packaging with foam cushioning - 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
Why Choose MEDILAB
- Over 35 years of expertise in laboratory glassware manufacturing
- Exporting to 40+ countries with a strong global presence
- Consistent export-quality production using advanced manufacturing techniques
- OEM / Private Labeling options for distributors and global brands
- High precision, reliability, and strict quality-control processes
- Safe, durable, and space-efficient packaging for international shipment
- Trusted by universities, pharma companies, research centers, and industrial laboratories worldwide
