Bonded Seals

An example of a static seal is a Bonded Seal, also known as a Usit Ring, Multi Seal, Dowty Seal, Dyna Seal, Mega Ring, or simply a washer.

These seals are used for sealing flange connections, bolt heads, hydraulic lines, threaded fittings, and cap or plug nuts.

Using Bonded Seals helps prevent the leakage of gases or liquids in your application.

A Bonded Seal consists of a rigid outer ring made of hard material and an inner ring made of elastomeric material, which functions as the gasket.

Bonded Seals are widely used in hydraulic systems, especially in applications requiring the sealing of bolt heads.

Due to the metal outer ring, Bonded Seals are particularly suitable for high-pressure systems. Heat and pressure are required during the manufacturing process to bond the seal to the outer ring, ensuring it remains securely in place.

This design enhances resistance to cracking, increasing the seal’s pressure capacity. Some models include an additional rubber flap on the inner diameter, also referred to as a self-centering ring.