What Is the Difference Between A Decanter Centrifuge And A Disc Stack Centrifuge?

April 16, 2024

The physical characteristics and capacities of the decanter centrifuge and disk centrifuge are very different, serving different industrial demands. Decanters are strong cylindrical devices that can continuously separate sediments from liquids in applications like wastewater treatment. They have a bigger footprint and can handle high weight. For fast and accurate separation in fields like biotechnology and pharmaceuticals, disk centrifuges are the way to go. Their compact disc stack design allows for high spinning speeds. By keeping the following differences in mind, customers may choose the best centrifuge for their individual needs:

Decanter Centrifuge

Disc Stack Centrifuge

Decanter CentrifugeDisc Stack Centrifuge

Material of Construction

Users must carefully evaluate the materials used to manufacture centrifuges. The material's resistance to corrosion and toughness affect the centrifuge's durability and efficiency.

Stainless steel bowls are typical of decanter centrifuges for those made by respected manufacturers. This ensures the bowl can handle processing different materials without problems and keeps it working well. The treated materials must be protected from corrosion and contamination using high-quality stainless steel.


Similarly, 316L stainless steel is the material of choice for the drum of disc centrifuges. Consumers must know that different grades of stainless steel have different levels of durability and resistance to corrosion. The use of 316L stainless steel highlights the dedication to superior craftsmanship, guaranteeing the centrifuge's dependability and endurance in various industrial uses.


Bowl components that are susceptible to corrosion are generally protected by disc centrifuge liners, which are an additional component of the main materials. These replacement bowl liners are essential to protect the centrifuge from wear and corrosion. This additional safeguard increases the centrifuge's longevity, particularly useful in processing environments with corrosive materials. In challenging industrial environments, corrosion resistance and overall performance are enhanced by using higher-quality materials. Therefore, users should know the precise grades of stainless steel. If you care about the effectiveness and durability of your centrifuges in various processing applications, you must choose the ones made with these high-quality materials.


One key difference between decanter and disk centrifuges is their direction. The orientation of various centrifuge types greatly affects the position of the intake and outlet connections, regardless of their outward appearance. Disc centrifuges have these connections at the very top, but decanter centrifuge usually has them along the length of the machine. Because it affects the overall design and simplicity of connection, this difference is critical for integrating these centrifuges into processing systems.


So, decanter centrifuges are ideal for applications that demand continuous separation and have a larger footprint due to their horizontal orientation. Disc centrifuges, conversely, are more compact due to their vertical orientation, which allows for perfect separation and connections at the top of the device. When deciding between the two, it's important to consider the application's needs in detail, considering factors like footprint, geographical limits, and the type of separation procedure.

Power Rating

Whether it's a decanter centrifuge or disk centrifuge, the power rating might vary depending on the specifications of the drive motor and any other features, such as electric heaters, that may be included. One of the most important factors determining these centrifuges' efficiency and operating capacity is the power rating.


A broad range of power ratings is displayed by decanter centrifuges developed for varied purposes. Tasks needing modest separation capacity are well-suited to the 10 HP motor of the smallest decanter centrifuge. Alternatively, motors above 500 HP are typically seen in large-capacity decanter centrifuges used for municipal wastewater treatment. Their essentiality to large-scale industrial operations is based on their enormous power, permitting the efficient processing of vast quantities of solid and liquid materials.


In contrast, even the tiniest decanter centrifuges often have a larger capacity than disk centrifuges. Mini disk centrifuges use a less powerful 1.5 HP motor drive with a flow rate of about 2 GPM. Applications such as medicine and biotechnology need meticulous control over the separation of liquids of different densities, and its design prioritizes efficiency and precision in this regard. Disc centrifuges are impressive because they may be powered by various configurations, one of which is 460 V three-phase electricity.


Disc centrifuges are designed for smaller-scale applications that prioritize efficiency, in contrast to decanter centrifuges that feature greater power ratings and are appropriate for heavy-duty jobs in large-scale enterprises. The processing needs will dictate which is better, with factors like power consumption, capacity, and the substances' properties playing a role in the decision. Overall, centrifuges' power ratings reflect their uses and the wide range of sectors that use them, from those dealing with municipal wastewater treatment to those dealing with pharmaceutical precision separation.

Design Differences

Decanter centrifuges stand out due to their less complicated and more minimalistic design. These centrifuges are simple and uncomplicated, consisting of a drum and an internal auger that spins. Decanter centrifuges, in contrast to disc centrifuges, have a more straightforward design, allowing quicker and easier service and a lower need for replacement components. Disc centrifuges make The sludge discharge procedure easier because of an extra internal mechanism. The intricate design of this hydraulic system is heightened by the fact that it uses water to power a sliding piston.


Because of the increased complexity caused by this system, disc centrifuges require more attentive upkeep and may see faster component wear over time. Decanter and disc centrifuge differ in the degree of complexity of their designs. Decanter centrifuges are known for their easy maintenance and simple design, which includes fewer parts. Adding a disc centrifuge's hydraulic system increases the design's complexity and, possibly, the need for more careful maintenance. Which one is better depends on the user's priorities regarding maintenance, how complex their program is, and how much simplicity they prefer.


Now that you know the difference between a decanter centrifuge and a disc stack centrifuge, why don’t you let professionals like Shenzhou Machinery handle your production? With our range of products, you can rest easy knowing you will get quality!


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