Types of Hydraulic Seals

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Hydraulic seals play a critical role in maintaining the efficiency and reliability of hydraulic systems by preventing fluid leakage and ensuring proper functioning of various equipment.

Variety and Importance of Hydraulic Seals in Fluid Systems

There are several types of hydraulic seals that are molded based on factors such as operating temperature, cylinder speed, operating pressure, application, and medium These seals are typically simple, non-metallic rings cast in the housing or assembled to form a sealing unit the installation of the. They are important for separating or blocking fluids in applications involving horizontal motion, and play an important role in machine tools by facilitating the conversion of fluids into linear motion

Water seals are typically made of a variety of materials, including rubber, PTFE and polyurethane. And selection of these seals depends on factors such as operating conditions, pressure limits, fluid type, temperature, and chemical compatibility. Compatibility with a specific business environment is also incredibly critical to productivity. 

In the area of hydraulic seals, there are static seals located in the center of the chamber with no movement, providing sealing in their confined area. On the other hand, dynamic seals include rod seals and piston seals. The rod seal attaches to the inner diameter of the hydraulic cylinder rod or shaft, while the piston seal attaches to the outer diameter of the hydraulic cylinder bore or tube

All About the Seals

Piston Seals

Piston seals are designed to prevent the passage of liquid or other media around the piston when the system pressure pushes the piston down the cylinder during a compression cycle. They come in two types: single-acting seals, where the pressure acts on one side of the seal, and double-acting seals, where the pressure acts on both sides of the seal.

Rod Seals

Rod seals are considered a crucial component of a cylinder’s sealing system. They prevent the leakage of liquid from inside a hydraulic cylinder to the outside as the rod moves back and forth, providing dynamic pressure sealing. Rod seals work in conjunction with wiper seals to protect the hydraulic system from external contaminants like dust, dirt, and atmospheric conditions.

Wiper Seals

Wiper seals, also known as scraper seals, are commonly used in combination with other sealing elements. They create a tight fit while allowing a reciprocating rod to move through the inner seal bore. Wiper seals help to prevent the entry of contaminants and maintain the integrity of the sealing system.

Wear Rings

Wear rings are employed to keep the piston centered, ensuring even wear and stress distribution on the seals. They are commonly used in rod and piston assemblies, playing a role in maintaining the alignment and longevity of the hydraulic system.

So where does this leave us? Hydraulic seals are vital components that come in tons of different types and materials. They separate and block fluids, allowing smooth motion and converting fluid energy into linear motion in machine tools. Picking the right material depends on factors like operating conditions, pressure, fluid properties, temperature, and compatibility. Whether it’s static seals in confined spaces or dynamic rod and piston seals, they all play a crucial role in sealing hydraulic cylinders and keeping the system running smoothly. So, choosing the right hydraulic seal is important to prevent leaks and ensure optimal performance.

At Seal & Design, we offer a wide range of seals for whatever your project needs. Our experienced sales team can assist you in choosing the right material based on your specific needs. 

Want to learn more or talk to a sales specialist? Visit our contact page for more information.