DESCRIPTION
1. What Are Rubber Bungs?
Rubber bungs (also called stoppers or plugs) are solid or perforated plugs used to close or seal the opening of a container, such as a laboratory flask, chemical drum, fermentation vessel, or pipe. They create a tight, often airtight or liquid-tight, seal through compression and friction, preventing spillage, contamination, and preserving contents.
2. Key Features & Benefits
Material Variety: Available in Natural Rubber, EPDM (excellent for steam/weather/ozone), Silicone (high-temp, food-grade), Neoprene (oil/fuel resistant), and Butyl (superior gas impermeability) to match specific media and conditions.
Functional Designs:
- Solid Bungs: For complete closure of openings.
- Hollow Bungs: Lightweight and cost-effective for large diameters.
- Tapered Bungs: Ensure a snug, progressive fit in varying openings.
- Perforated Bungs: Feature pre-drilled holes (1-hole, 2-hole) to accommodate thermometers, tubing, or agitators.
- Engineered Performance: Compounds are selected for specific properties like autoclavability, FDA-compliance for food contact, or USP Class VI certification for pharmaceutical use.
FAQ
Q: How do I choose the right size rubber bung?
A: Measure the inner diameter (ID) of the opening you need to seal. Our sizing is typically based on the top diameter of the tapered bung. Consult our detailed size chart or provide the ID/OD of your container neck.
Q: What's the difference between a solid bung and a hollow bung?
A: Solid bungs offer maximum sealing integrity and are used for smaller openings or high-integrity seals. Hollow bungs are used for larger openings (like drum bungs), providing an effective seal while using less material, making them lighter and more economical.
Q: Can your rubber bungs withstand autoclaving?
A: Yes, but material selection is critical. Silicone and EPDM rubber bungs are excellent choices for repeated autoclaving. Specify your sterilization needs when ordering.
Q: Do you offer custom shapes and formulations?
A: Yes, custom molding is our specialty. We can produce bungs in virtually any shape, size, color, and rubber compound to meet unique application challenges, including overmolding on metal inserts.
