Mechanical shaft seals for APV products

Shaft seals play a crucial role in maintaining the safety and efficiency of APV products. They ensure that liquids, gas or solids are kept inside the system while preventing contamination and leaks. In this guide, we will explore the design, material selection and applications of shaft seals for different pump types.

Mechanical shaft seals in APV systems offer a number of key benefits that make them an ideal solution in production environments. These sealing solutions are known for their high durability and reliability, ensuring continuous operation without unnecessary interruptions. The ability of shaft seals to provide effective sealing even in extreme conditions makes them indispensable in demanding applications. In addition, shaft seals can be customized for a wide range of different applications, providing flexibility and tailor-made solutions for specific needs.

Each mechanical shaft seal consists of a rotating part and a stationary part that work together to ensure an effective seal. The rotating part follows the movement of the shaft while the stationary part remains fixed, creating a dynamic seal. A film forms between the two surfaces, which is typically lubricated by the product being moved in the pump. This film reduces friction between the rotating and stationary parts, minimizing wear and improving sealing efficiency by preventing leaks.

The W+ is a centrifugal pump designed for high performance and energy efficiency, especially in the food and beverage industry. Known for reliability and robustness, this pump is ideal for liquids such as milk, juice and water. Used in dairies for milk and cream, or in beverage production for juice and water, where hygiene and gentle handling are essential.

W+ pumps require shaft seals designed to maintain strict hygiene standards and resist wear and tear. The shaft seals must be made of durable materials such as silicon carbide and carbon, where silicon carbide is ideal for abrasive fluids and carbon is best for non-aggressive fluids. This material choice ensures an optimal balance between seal durability and friction resistance, making W+ pumps a preferred choice in sectors that value both efficiency and hygiene. Alfotech supplies mechanical shaft seals for W+ pumps. 

WS+ is designed for demanding applications with high pressures and temperatures. These pumps are ideal for industrial processes in the chemical industry where they handle corrosive chemicals and high-temperature media such as acids or bases. WS+ models can be customized to specific needs with different materials and configurations for optimal performance.

The shaft seals, typically made of silicon carbide and stainless steel, provide high resistance to mechanical stress and chemical corrosion. There are several types of shaft seals available, such as single or double mechanical seals, depending on the liners of the application. These seals ensure reliable sealing in extreme conditions, minimize leaks and extend pump lifetime. At Alfotech, we are always ready to help you find the right mechanical seal for your APV pump.

The DW series are positive displacement pumps specifically designed to handle highly viscous media in the food industry, such as ketchup, honey and creams. The pumps are equipped with robust components that can withstand demanding conditions. Often double mechanical shaft seals are used to handle the extra friction and pressure of viscous liquids. Materials such as carbon and silicon carbide are popular for the seals; carbon reduces friction and extends seal life, while silicon carbide increases durability and resistance to wear. These seals are essential for maintaining hygiene, preventing contamination and minimizing wear in high-volume production.

Alfotech is ready to assist you in finding the optimal shaft seal and the best material combination for your APV pumps. At Alfotech, we help you understand how to choose the right spare parts.

Choosing the right material combination for shaft seals is crucial for extending pump lifetime and minimizing downtime, which can have a significant impact on the efficiency and cost of an industrial process. Different pump types require specific materials to ensure they can withstand the chemical and physical stresses they are exposed to; for example, a W+ and WS+ mechanical seal with a rotating part made of silicon carbide can be advantageous when transporting media such as salt. Silicon carbide is an extremely durable and corrosion-resistant material that is harder than carbon and is particularly useful when handling media that can crystallize or wear-sensitive applications. 

When choosing a mechanical shaft seal with a rotating part made of carbon, it is often an excellent choice for handling media such as water, oils and slightly corrosive liquids. Carbon is a soft material that resists friction well, making it ideal for applications where a balance between wear resistance and lubricity is required. It is typically used in situations where the sealing surfaces must withstand moderate pressures and temperatures without compromising the integrity of the seal.

Choosing the right material for shaft seals not only ensures optimal performance and durability, but also reduces downtime in your factories, which can ultimately lead to cost savings and increased reliability in production processes.

We have a wide range of mechanical shaft seals specifically designed for APV pumps. Our expertise ensures you get the right spare parts for your needs. 

Our skilled technical team is always ready to help and ensure your shaft seals are of the highest quality and meet all your liners. With the right combination of materials and our long-standing expertise with mechanical shaft seals, you can increase the efficiency of your APV system and minimize production downtime, which can be an important investment for your business in the long run. 

Contact us today on +45 7020 0422 or inquiry@alfotech.eu for guidance on material combinations and spare parts.

Silicon carbide is extremely durable and corrosion resistant, making it ideal for handling aggressive fluids and media that crystallize. This material can extend the life of the shaft seal and reduce maintenance costs. It is also resistant to high temperatures and mechanical stress.

Shaft seals are used in rotating equipment such as pumps, compressors and mixers where it is necessary to prevent leaks and contamination. They are especially used in food and pharmaceutical production environments where hygiene and reliability are crucial. They are also important in applications with aggressive media or high temperatures.

Yes, shaft seals can be adapted to specific liners such as the nature of the medium, temperature and pressure conditions. This ensures optimal function under the given operating conditions. By adjusting the seal, we can also achieve longer durability and reduce maintenance needs. Contact us today for advice on your specific applications.