test tube stopper
In laboratories, one working day is unthinkable without rubber stoppers that need to plug bottles and test tubes. These plugs prevent the liquid from leaking out of the container, but they also prevent the entry of external substances that can contaminate the contents. In laboratories, larger amounts of liquid are mostly found in tinted bottles that have screw caps, while chemicals are usually mixed in clear bottles or test tubes. These bottles and tubes have no threads and their caps are conical in shape which is ideal for closing them. test tube stoppers are very carefully designed to be safe. These are sensitive substances that are very sensitive and need special attention. Test tube stoppers are produced in different sizes. The upper end of the cap is wider than its lower end, which enables and guarantees that the cap will be suitable for different sizes of tubes or bottles.
If the contents of the test tube do not evaporate with chemicals, and thus do not create a certain pressure, then tube test stoppers without holes are ideal for you. So completely flat. However, certain chemicals that have high volatility can very easily create pressure from the gases they emit. In these cases, it is very important to use plugs with one or more holes that allow the gas to be released before strong pressure is created. In addition to this purpose, test tube stoppers with holes are also used in the laboratory as part of a larger apparatus where it is necessary to connect a large number of tubes with tubes that go from cap to cap.
Test tube stoppers are very durable and are made of very resistant and flexible guna. They react very well in contact with various chemicals, oils, they tolerate both very low and high temperatures very well. They are resistant to UV radiation.
Stopper & Plug Size Catalog
Compare four stopper profiles and check the selected part dimensions against your opening and available depth. Each profile has its own drawing and dimension meanings.
Custom colors are available to your Pantone color code. Include the code in your inquiry.
RST T-Shaped Plugs
Match stem diameter A, flange diameter B, stem length C and flange thickness D. E refers to the underside recess; use the selected row and approved drawing to confirm the actual profile.
RSA Tapered Corks
Compare large-end diameter A, small-end diameter B and Height, in mm. The mating bore and required seating depth determine where the taper contacts the opening.
RSB Undercut Plugs
Compare neck diameter A, flange diameter B, flange-to-lip distance C and flange thickness D. Check panel thickness and rear clearance. E refers to the underside recess.
RSD T-Shaped Stoppers
Compare stem diameter A, flange diameter B, stem length C and head thickness D, in mm. Check the seating surface and available depth as well as the hole diameter.
Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.
Discuss Your RequirementsProduct specifications
- Product form
- Removable closure fitted inside an opening
- Application focus
- Test tubes, laboratory vessels and bottle necks. Size the part against the selected assembly.
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip. Match these to test tubes and laboratory vessels.
- Profiles discussed
- Tapered sections. Select the profile that matches the mating part and dimension that section explicitly.
- Contact conditions
- Other gases and lubricating oil: define concentration, temperature and contact time, then check compatibility with the chosen compound.
- Exposure to evaluate
- Sunlight or UV and oil splash. Validate the selected material under the combined conditions.
- Seating check
- Check the sealing contact around the opening and the force needed for insertion and removal.
Need a quote or a custom part?
Send your requirements, drawings or samples to discuss standard and custom silicone rubber parts.
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