The rubber bung (also known as a stopper) is available in either a straight or tapered shape with the main application to plug the holes in metal plates, seal an opening in flasks, test tubes or other types of laboratory glassware.
The tapered bungs are suitable for a variety of applications with an extensive range of panel-holes. The tapered design typically offers a tighter fit and are generally available in Rubber, but cork is also available for different applications. However, the rubber bung is more preferred for applications that necessitate a higher level of chemical resistance or tighter seals.
The Main Purpose Of The Rubber Bung
The main purpose of the rubber bung involves stopping liquid or gas from escaping from the container it is stored in during scientific experiments.
A rubber bung also serves the purpose of preventing contamination in regards to samples in the way of protecting contents inside the laboratory glassware from exposure to air.
Lastly, using rubber bungs also allows the experimenter the ability to mix or shake solutions without spilling the contents.
The Rubber Bung Shape
The shape is a simple design, but along with the correct material, provides a very affected solution for such a simple device.
As far as the shape, standard bungs are typically cylindrical with a tapered bottom that can be fitted firmly in the adjoining device, and with the rubber material, provides a very tight fit with a good seal.
Rubber bungs are available with either a single or double hole that allows for the insertion of test equipment, tubing or pipettes.
The Rubber Bung Size
The bung diameter ranges from 0.5 inches to 5 inches. The tapered ends range from five-sixteenths to 3.5 inches.
The smaller bungs are used for test tubes, along with other types of similar glassware, while larger bungs are more appropriate for the beakers and flasks.
The Main Properties
Rubber bungs can be used in a range of applications due to the materials impermeability, chemical resistance and elasticity, along with an improved heat resistance of up to 400°F.
The elasticity is what allows for an extremely tight seal against the adjoining material.
The chemical resistance also makes the rubber bung safe to use with reactive and corrosive compounds.
The impermeability assists in preventing the escape of gases or liquids out of the container.
Silicone bungs are used in a variety of applications, from medical and hospital environments, along with haematology, biology, food-science and industrial applications.
As with most things, there are more to bungs, or stoppers, than meets the eye.
The design and material of the bung is so important to make the bung fit for purpose.
Choose your bung or stopper wisely for the right application in mind.