What are the sealing methods for multi-stage pumps in the petrochemical industry?

Category: Water pump knowledge

2025-08-09

The petrochemical industry is a crucial pillar of the national economy, involving a large amount of fluid conveyance. Multistage pumps are one of the core equipment, and their sealing performance is directly related to the safety, efficiency, and product quality of production. The main sealing methods of multistage pumps in the petrochemical industry are introduced below.

1. Mechanical Seal

The mechanical seal is one of the most commonly used sealing methods for multistage pumps. It uses a mechanical device to tightly fit the stationary ring and the dynamic ring between the pump shaft and the casing to achieve sealing. Mechanical seals are characterized by good sealing effect, long service life, and easy maintenance.

2. Packing Seal

Packing seal is a traditional sealing method that achieves sealing by filling soft packing materials. Although its sealing effect is not as good as that of a mechanical seal, it has better adaptability in some specific application scenarios, such as conveying media containing solid particles.

3. Magnetic Drive Seal

Magnetic drive seal uses the magnetic force of magnetic materials to achieve sealing. It is suitable for conveying flammable, explosive, toxic, and harmful media. Due to its contactless and leak-free characteristics, magnetic drive seals are widely used in the petrochemical industry.

4. Lip Seal

Lip seal is a simple and effective sealing method suitable for low-power multistage pumps. It uses the deformation of elastomeric materials to form a seal, with the advantages of simple structure and low cost.

5. Combination Seal

For some special working environments and media, a combination of multiple sealing methods may be needed to achieve better sealing effects. For example, combining mechanical seals with magnetic drive seals, or using packing seals and lip seals together.

In addition to the above sealing methods, some new sealing technologies, such as gas film seals and liquid film seals, are also used in petrochemical multistage pumps. These new technologies can improve sealing performance, reduce leakage, and improve equipment safety and reliability.

In summary, there are various sealing methods for multistage pumps in the petrochemical industry. Choosing the right sealing method is crucial for ensuring the safety, efficiency, and product quality of production. In practical applications, the appropriate sealing method should be selected according to the nature of the medium, working conditions, and equipment requirements.

Previous: No more!

Next: What are the basic parameters of multistage pumps in the petrochemical industry?

Contact Us

Free Hotline:0086-13307481676

Fixed telephone:0086-13307481676      

Mobile:0086-13307481676(WeChat)

E-mail:sales@sanchangpump.com