Jun. 30, 2025
Rubber stoppers are small, yet essential components used in many industries, such as pharmaceuticals, healthcare, and food and beverage. They play a significant role in sealing containers, keeping products safe, and preserving their shelf life. Choosing the right rubber stopper is crucial to ensure your products and equipment are protected from contamination, leaks, and damage. In this article, we will talk about why selecting the right rubber stopper matters and how it can affect your business's success.
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Rubber stoppers are commonly used to seal vials, syringes, bottles, and other containers that hold medicines, vaccines, and other healthcare products. Using the right rubber stopper can prevent contamination of the contents of the container by microorganisms, bacteria, and foreign particles. For instance, if you use a rubber stopper that does not fit properly, it can allow air or moisture to enter the container, which can degrade the product's quality and reduce its efficacy.
Choosing the right rubber stopper is essential to ensure an airtight seal of the container, which keeps the product fresh and prevents oxidation. Rubber stoppers come in different sizes and shapes, and choosing the wrong size or type can lead to leaks and damage to the container. An airtight seal also helps prevent spillage during transport and handling, reducing the risk of accidents and product loss.
Rubber stoppers come in different materials, each with specific chemical properties suitable for certain applications. For instance, if you use a rubber stopper that is not compatible with the product or solvent you are using, it can cause chemical reactions that can damage the product or equipment. Choosing the right rubber stopper that is chemical resistant can prevent damage and ensure the product's stability and potency.
Using the right rubber stopper can also increase the container's shelf life by preventing contamination and oxidation, as well as maintaining the product's quality and efficacy. This, in turn, can help improve your business's bottom line by reducing the cost of product loss, waste, and recalls.
Choosing the right supplier for your rubber stoppers is just as important as selecting the right type of stopper. A reliable and reputable supplier can ensure the quality, consistency, and availability of the rubber stoppers you need. They can also provide technical support and advice to help you choose the right type of stopper for your specific application.
If you need help choosing the right rubber stopper for your application, feel free to contact us for technical support and advice. We are committed to providing our customers with high-quality, reliable rubber stoppers that meet their specific needs.
Our Vial rubber stoppers are made from high-quality, chemical-resistant materials that are suitable for use in pharmaceuticals, healthcare, and laboratory applications. We offer a variety of sizes and shapes to fit your specific vial requirements.
Our Vacuum Rubber Stoppers are designed to provide an airtight seal for vacuum chambers and other equipment that requires a vacuum environment. They come in different materials and sizes to fit your specific needs.
In conclusion, choosing the right rubber stopper plays a vital role in ensuring the quality, safety, and efficacy of your products and equipment. It can also help increase your business's bottom line by reducing product loss, waste, and recalls. Contact a reliable and reputable supplier like us for all your rubber stopper needs.
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How does a flexible impeller pump work?
A flexible impeller pump is a type of pump design which consists of a circular rubber impeller with several flexible rubber vanes mounted within a casing.
The casing is smaller than the impeller vanes, meaning to insert the vane into the pump head, the vanes must be bent creating a seal and chamber between each vane. The pump head then contains several chambers which operate like valves, making the pump self-priming, and a positive displacement pump.
There are numerous advantages of a flexible impeller pump, which are:
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· Self-prime from dry and prime up to 6M.
· High flow capacity and can operate at full motor speed with low viscosity fluids
· Versatile - can be run at different speeds to accommodate differing viscosities. As the pump is positive displacement its pressure will also be constant, and the flow rate proportional to speed.
· Works in any location. The nature of the pump means it is a preferred pump to be used by machine builders as it can be mounted in almost any position and still work as intended.
· Gentle pumping action ensures the consistency of the fluid remains unaffected by shear forces e.g. milk, cream, thixotropic fluids.
· Flow is also non pulsating, meaning the output can be measured very accurately with a flowmeter.
· Easy Maintenance due to few moving parts – only 8 parts in total. 4 of which are wearing.
· Solid Handling capability – solids can be handled with ease, but also without damage. Seeds, grapes and fruit in suspension can be handled gently, retaining solid integrity. It is favoured in the brewing industry as not only does it pump gently, but it can handle solids. Solids are also kept in suspension which can be important with textured products, such as; yogurts, drinks, or sauces.
· Cleaning in Place friendly – Such pumps are very easy to dismantle and clean
· Reversible to enable multiple applications to be used by one pump, such as; tank loading and unloading
· Many accessories available to optimise the pump to your process, including; carry handle, variable speed drive, trolley, flowmeter, and hosing.
· Pump head can be made with differing connections, such as; BSP M, BSP F, RJT, Tricover, Triclamp to suit your process.
Flexible impeller pump vs centrifugal?
Flexible impeller pumps are often compared to centrifugal pumps, however the two are quite different. A flexible impeller pump is a different pumping technology, positive displacement. This means the pump prevents liquid recirculating in the pump head and back towards the inlet. Its pumping motion is always forward, or positive, as opposed to centrifugal pumps where fluid can recirculate back towards the inlet.
How to Prime a flexible impeller pump?
A flexible impeller pump is self-priming from dry up to 3M. Flexible impeller pumps should not be run dry, but in order to help with priming on start-up during first use, ideally both inlet and outlet ports should be filled with fluid to lubricate the impeller and assist with priming. If possible, the front cover should also be removed from the pump and the chambers filled with the fluid to be pumped, which will help fully lubricate the impeller upon first use.
Flexible Impeller Pump Wear
Normally the flexible rubber impellers should be replaced annually, or if any of the below conditions are present:
1. Flexible impeller blade bead is flat
The tip of the impeller should be bent and form a tight seal against the pump casing. If any part of the impeller begins to wear, this will cause inefficiency within the pump causing the pump to lose suction, flow rate and pressure.
2. Impeller blade pitting (cavitation)
Any pitting on the impeller vanes reduces the structural integrity, limiting the pressure generating ability of the pump. Parts of the vane can break off contaminating the fluid. Possible causes of pitting can be chemical attack. A recent change in the additives used in oils has meant flexible impeller material may now be unsuitable and require changing.
3. Impeller vanes torn
Any tears in the rubber vane will affect the strength of the vanes, limiting the priming ability of the pump, and the pressure generating ability of the pump. If a blade snaps off, it can contaminate the product or jam the impeller, causing the motor to burn out. Impellers which are torn can be a sign of another problem stemming from over pressure, or chemical compatibility.
4. Flexible impeller blade set in bowed position (set)
Over time or due to hardening, a flexible impeller pumps blades can become permanently deformed. This then limits the priming ability of the pumps and causes slippage within the pump head causing flow rate to drop. Pressure generated by the pump will also be limited. Impellers set in a bowed position can be caused by long term use, or due to oils within the rubber being stripped, causing the rubber to harden. This can happen if the impeller is in contact with fluids which are incompatible with the rubber.
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