7 Different Types of Mechanical Seals Explained [2025 Guide]

Different Types of Mechanical Seal and How They Are Classified for Pump Selection

Mechanical seals can be categorized based on the structural design, mode of operation and operation features of each style of mechanical seal. Frequently used types include balanced seals vs. unbalanced seals, pusher seals vs. bellows seals, wet vs. dry running, etc. The way a particular type of mechanical seal reacts to changes in pressure, temperature and axial movement of the shaft is influenced by these classifications. By knowing these different types, an engineer can select a seal that meets the requirements of the system's processes and the equipment's construction.

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Advantages of Different Types of Mechanical Seal

Wide Applicability Across All Areas of Industry

Mechanical seal systems have the potential to cover a majority of the standard types of industrial sealing requirements.

Knowledge-Based Selection Logic

Mechanical seal systems employ methods that assist customers in identifying suitable mechanical seal systems quickly and efficiently.

Proven Mechanical Seal Design Principles

Mechanical seal systems utilize mechanical sealing principles that have stood the test of time, making selection more straightforward for the end-user once mechanical seal systems have been properly identified.

Application Different Types of Mechanical Seal

Different types of mechanical seals are universally applicable in various structural forms throughout all industrial segments and applications. Standard mechanical seals are commonly applied to pumps where there is need for dimensional interchangeability and simple installation. Standard mechanical seals are used in water treatment facilities, utility companies and industrial manufacturing acceptance facilities, because standard mechanical seals create the best scenarios for simple inventory control and the most effective maintenance planning systems.

FAQ

What are the main mechanical seal types?

The following are the general mechanical seal forms widely used in the mechanical industry: Component seals, Cartridge seals, Balanced designs, and Unbalance designs.

Are seal types standardized across manufacturers?

While the general concept of a mechanical seal is the same across these different manufacturers, there is generally some variation to how each manufacturer designs a seal based on their own preferences for that seal's construction.

Can one system use multiple seal types?

It is possible to utilize multiple types of seals in a single system if enough considerations are given to the equipment being used and the environment in which it operates.

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How cross-departmental teamwork drove success in a high-stakes mechanical seal project. Discover our proven process for on-time, precision delivery. Learn more now.

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What Our Customers Say

Paul

“The availability of supply chain seal systems allows me to standardize across multiple machines"

Rachel

"Choosing between seal system types was simple once mechanical seals had been properly classified"

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Why Choose Us

Jiangsu Golden Eagle Fluid Machinery Co. Ltd. is a leading global manufacturer of fluid sealing products, and one of China's earliest companies to engage in the mechanical seal industry. We have more than 50 years of manufacturing experience and full capability to supply our customers with a wide range of sealed products.

Jiangsu Golden Eagle's engineering team also provides complete engineering support from the initial design through the final installation, to ensure every customer has an efficient, secure, and easy-to-use sealing system.