What is centrifugal pump mechanical seal

Mechanical seals of centrifugal pumps, also known as industrial mechanical seals or mechanical seals, are components configured for connecting mechanisms in such a way as to prevent any fluid loss.

They are devices capable of providing the necessary seals and are usually placed on the rotating shaft of a rotating device designed to operate with a liquid element.

Like other mechanical components, centrifugal pumps have many types of mechanical seals. Choose the right time; Therefore, it is important to consider not only the operating conditions, but also the different characteristics that the fluid in the device may have. These properties may be the temperature, the working pressure that needs to be maintained, or the solid elements that the fluid itself may contain. The speed and diameter of the shaft must also be considered.

What are the roles of mechanical seals in centrifugal pumps?

As we have seen, these types of mechanical seals are mainly used to prevent fluid leakage in different types of rotating equipment. However, they can also be used for gas sealing.

They are most commonly used in hydraulic centrifugal pumps. Their presence in the system helps improve operational safety and significantly reduces the amount of maintenance effort required. This is due to the lower friction loss as well as the fact that heat generation is reduced.

How to replace the mechanical seal of the centrifugal pump

With time and use, the mechanical seal of any pump can eventually suffer some kind of damage. Such problems are usually easy to spot because liquid starts leaking out where it shouldn't.

If there is a problem, something needs to be done. In this video, you can learn how to remove and assemble the mechanical seals of FL30CI and FL50CI pumps, some of the most successful models in our extensive catalogue of industrial pumps. The process of replacing the mechanical seal of a centrifugal pump is basic and the instructions we give you in the video will be very useful whether we need to repair this component or replace a new one.

This way, once the impeller is removed, it has access to the seals used, allowing it to be removed from the assembly. If the spring breaks completely, or the part is damaged, it may need to be replaced. If not, one way to fix it is to clean all surfaces, including the shaft. This can be done with fine sandpaper.

Whether the old seals are used or the new seals are replaced, we must apply lubricating grease. This way, we can insert it into the correct position without too much force. When everything is ready, place the appropriate retainer and complete the pump assembly.

What are the types of mechanical seals for centrifugal pumps?

In the field of centrifugal pump mechanical seals, there are many kinds. Some of the most common are:

Thrust and non-thrust seals: These seals include an axial spring in the entire shaft seal assembly. This allows for a completely fixed seal. When we talk about "non-thrust," we mean those that use metal bellows instead of springs. In both cases, these seals can withstand misalignment and minor vibration.

• Conventional seals: These are usually designed as fixers and are versatile. However, the main use is usually for pump and compressor upgrades. They do need engineering installation.

Ink cartridges: They have the advantage of being easily replaced. Many modern pumps use this type because maintenance is simpler and faster.

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