Premium Laboratory Rubber Stoppers for Secure Glass Tubing Connections
In professional laboratory and industrial settings, creating a secure, leak-proof seal between glassware components is a fundamental yet critical task. Our high-quality rubber stoppers are engineered specifically to address the challenges of this process, ensuring safety, reliability, and repeatability. A proper technique is essential when inserting glass tubing into a rubber stopper to prevent breakage and ensure an airtight seal, and our products are designed to facilitate this procedure flawlessly.
Product Overview
Our laboratory rubber stoppers are precision-molded from premium-grade materials to offer exceptional chemical resistance, elasticity, and durability. They are available in a comprehensive range of sizes (numbered and solid) and bore options to fit standard and custom glass tubing diameters. Designed for use in educational, research, pharmaceutical, and chemical processing environments, these stoppers provide a dependable interface for apparatus assembly, from simple distillation setups to complex reaction vessels.
Key Features
- Superior Material Composition: Manufactured from high-purity synthetic rubber compounds for excellent resistance to acids, alkalis, and solvents, minimizing degradation and swelling.
- Precision Bore & Taper: Uniform, cleanly punched holes with a consistent taper ensure a snug, secure fit on glass tubing, reducing the risk of leaks or slippage.
- Enhanced Safety Design: Optimal elasticity reduces the force required during insertion, mitigating the risk of glass breakage and potential injury when inserting glass tubing into a rubber stopper.
- Temperature Resilient: Maintains flexibility and sealing integrity across a wide operational temperature range.
- Autoclavable Options: Select product lines are capable of withstanding repeated autoclave sterilization cycles without loss of performance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Material | Synthetic Rubber (SBR, Silicone, Neoprene options available) |
| Standard Sizes | #00 to #13, Solid Stoppers (00-13) |
| Bore Types | Single Hole, Double Hole, Multi-Hole, Solid |
| Bore Diameter Range | 1 mm to 20 mm (custom sizes available) |
| Temperature Range | -30°C to 250°C (varies by material) |
| Chemical Resistance | Excellent resistance to most common laboratory chemicals, water, and alcohols |
| Sterilization | Autoclavable (Silicone), Chemical Disinfection (All) |
| Color | Black, Red, Gray, White (Silicone) |
| Packaging | Bulk bags, Unit boxes, or Custom packaging per request |
Application Scenarios
Our rubber stoppers are versatile components used across numerous technical fields:
- Chemical Laboratories: Assembling distillation, filtration, and reflux apparatus; sealing reaction flasks and gas collection systems.
- Pharmaceutical & Biotech: Sealing culture vessels, fermentation tanks, and sample storage containers under sterile conditions.
- Educational Institutions: For safe and reliable student experiments in chemistry and biology labs, where proper technique when inserting glass tubing into a rubber stopper is taught.
- Industrial Process Lines: Sealing sight glasses, sampling ports, and connecting tubing in pilot plants and production systems.
- Quality Control & Testing: Creating sealed environments for gas analysis, pressure testing, and sample preparation.
Advantages
- Leak-Proof Performance: Engineered for a perfect seal that maintains vacuum or pressure integrity in sensitive applications.
- Extended Service Life: High resistance to compression set and chemical attack ensures the stoppers retain their shape and function over time, offering a better return on investment.
- Operational Safety: Reduces a common lab hazard. Their design and material properties lower the risk associated with the manual task of inserting glass tubing, protecting both personnel and expensive glassware.
- Process Consistency: Uniform dimensions and material properties guarantee reproducible results in experimental and production workflows.
- Broad Compatibility: Suitable for use with Pyrex, borosilicate, and other common laboratory glassware.
Why Choose Us
As a trusted manufacturer and supplier in the laboratory consumables sector, we distinguish ourselves through:
- Direct Manufacturing & Quality Control: We oversee the entire production process, from raw material selection to final inspection, ensuring every stopper meets stringent quality standards.
- Deep Technical Expertise: We understand the practical challenges in the lab. Our product development is informed by real-world use, including the critical steps involved when inserting glass tubing into a rubber stopper.
- Customization Capability: We offer tailored solutions for OEM clients, including custom sizes, bore configurations, material formulations, and private labeling.
- Global Supply Chain Reliability: With robust logistics partnerships, we guarantee on-time delivery to distributors and large-volume end-users worldwide.
- Competitive B2B Pricing: Our efficient manufacturing scale allows us to offer superior products at highly competitive prices, especially for bulk and repeat orders.
FAQ
Q1: What is the correct technique when inserting glass tubing into one of your rubber stoppers?
A: Always lubricate the glass tubing with water or a suitable glycerol/water mixture. Hold the glass tubing close to the end entering the stopper, and with a gentle twisting motion, insert it through the bore. Never use excessive force. Always protect your hands with gloves or a cloth towel. Our stoppers are designed with an optimal durometer (firmness) to make this process safer and easier.
Q2: How do I select the right size stopper and bore diameter?
A: The stopper size (#0, #1, etc.) must match the inner neck diameter of your flask or container. The bore diameter should be slightly smaller than the outer diameter of your glass tubing to ensure a tight seal. Our technical datasheets provide detailed sizing charts. Please contact our support team for specific guidance.
Q3: Are your stoppers resistant to organic solvents?
A: Our standard synthetic rubber (SBR) stoppers offer good general chemical resistance. For applications involving strong organic solvents (e.g., acetone, hexane, toluene), we recommend our Neoprene or specially formulated solvent-resistant versions. Silicone stoppers are excellent for high-temperature and biological applications but may swell with some solvents.
Q4: Can I order custom stoppers with multiple holes of specific diameters?
A: Yes. We specialize in custom manufacturing. We can produce stoppers with any arrangement of bore sizes and patterns to your exact specifications. Minimum order quantities apply for custom projects.
Q5: What is your packaging and minimum order quantity (MOQ) for international orders?
A: Standard products are available in bulk packs (e.g., 100 pcs per size). We offer flexible MOQs to suit both large distributors and smaller B2B buyers. Export packaging is robust and designed to prevent damage during transit. Contact us for a detailed quote based on your needs.
