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 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).

Packaging:

• Individually protected with cushioning for safe global shipping
• Bulk or OEM packaging available

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.

Why Choose MEDILAB

• 35+ Years of Manufacturing Expertise in laboratory glassware and flow-control components.
• Trusted in 40+ Countries by scientific institutions, industries, and global distributors.
• Export-Quality Standards: Precision workmanship with strict QC at every production stage.
• Secure Packaging & Global Logistics: Ensures safe, break-free delivery worldwide
• OEM & Private Label Options: Supporting distributors and brands with customisation and branding.
• Consistent Reliability: Proven durability and performance across diverse lab environments.