Everything you need to know about self-centralizing bonded seals

- Categories : Bonded seal
Everything you need to know about self-centralizing bonded seals

What are self-centralizing bonded seals?

In the world of industrial sealing, self-centralizing bonded seals have gained a prominent place thanks to their improved design and ability to optimize performance in critical applications. These seals are an evolution of standard bonded seals, offering significant advantages that make them ideal for demanding environments.

They are designed to ensure effective sealing in threaded connections, particularly in hydraulic and pneumatic systems. They consist of two main elements:

External metal ring:

  • Made of steel (usually galvanized or with other anti-corrosion coatings) or stainless steel.
  • Provides mechanical strength and withstands high pressures.

Elastomer core (Buna-N or NBR):

  • Housed in an internal groove of the metal ring, ensuring elastic and chemically resistant sealing.
  • The self-centralizing design incorporates an internal lip that guides the seal to ensure correct positioning during installation.

Advantages over standard bonded seals

  • Self-centering: The internal lip design facilitates the automatic centering of the seal in the housing, preventing displacement and ensuring correct installation, especially in fast-paced work conditions or confined spaces.
  • Reduced risk of leaks: Thanks to its more precise positioning, failures caused by incorrect installation are minimized, improving system reliability.
  • Longer service life: The elastomer, protected by the metal ring, is less exposed to mechanical damage or premature wear, increasing durability.
  • Easy installation: The self-centralizing feature simplifies assembly, reducing installation time and eliminating the need for manual adjustments.
  • High-pressure resistance: They withstand higher pressures due to the robustness of the metal design and the perfect distribution of the seal.

Common applications

The self-centralizing bonded seals are used across a wide range of industrial sectors due to their reliability and ease of use. Some of their most common applications include:

  • Hydraulic and pneumatic systems (heavy machinery equipment such as cranes, excavators, and hydraulic presses)
  • Oil and gas industry (pipes for extraction, transportation, and hydrocarbon refining)
  • Aerospace and automotive (power steering and hydraulic brake systems, critical components in engines and combustion systems)
  • Industrial machinery (applications in pumps, valves, and actuators where reliable sealing is required under demanding conditions)

Composition and key materials

The elastomer and metal combinations for bonded seals available at JIOrings are:

Metal Component

Metal Support

Minimum Burst Pressure

AISI1008-10101 Galvanized Steel

540 MN/m²

SS316L/SS304L Stainless Steel

540 MN/m²

Elastomer Component

Material

Resistant to

Aggressive to

NBR

Oils, greases, hydraulic fluids, chemicals, and a wide range of hydrocarbons

Ozone, ketones, esters, aldehydes, chlorinated and nitro hydrocarbons

FKM/VITON®

Better fluid resistance than other elastomers. Resistant to all aliphatic, aromatic, and halogenated hydrocarbons, acids, and animal and vegetable oils.

Ketones, alcohols, and low molecular weight ethers, nitrogen-containing components

EPDM

Good chemical resistance to oils, fuels, acids, and aggressive chemicals

Ammonia, sodium hydroxide solutions, and low molecular weight ketones

Why choose self-centralizing bonded seals?

These seals are the ideal choice for applications where precision and sealing reliability are critical. Their advanced design ensures superior performance compared to standard bonded seals, optimizing both installation times and operational safety. If you are looking for a product that combines strength, durability, and ease of use, self-centralizing bonded seals are the perfect solution.

If you need more technical information or specifications about these seals, do not hesitate to contact us.

We will be happy to help you find the most suitable sealing solution for your application!