Where Are Bonded Seals Commonly Used?

Bonded seals, also known as metal‑to‑rubber washers, are widely recognized in the sealing industry. They consist of a metal ring bonded to an elastomer insert, combining the strength of metal with the flexibility of rubber. Compared to traditional washers, bonded seals provide more reliable sealing under high pressure, making them indispensable in many industrial systems.

Hydraulic Systems
Hydraulic pumps, valves, and fittings are primary applications. High pressure often causes ordinary rubber washers to deform, but the metal reinforcement in bonded seals prevents extrusion and ensures long‑term sealing.

Pneumatic Equipment
In pneumatic lines and valves, bonded seals are used at threaded connections. They maintain sealing stability during frequent actuation and reduce leakage caused by vibration.

Automotive and Heavy Machinery
Bonded seals are applied in engines, gearboxes, and hydraulic steering systems, especially at bolt and threaded joints. Their ability to withstand heat and pressure helps prevent fluid leakage that could compromise performance.

Oil, Gas, and Chemical Industries
Bonded seals are suitable for pipelines, chemical processing equipment, and pressure vessels. By selecting appropriate elastomer materials such as FKM or HNBR, they can resist aggressive fluids and harsh environments.

FAQ
Are bonded seals a replacement for standard washers? In high‑pressure and high‑temperature environments, bonded seals are more reliable, but standard washers remain sufficient for low‑pressure applications.

How should materials be chosen for bulk orders? Stock based on industry demand: NBR for hydraulic systems, FKM for chemical industries.

What if customers report leakage after installation? Check whether the mating surfaces are flat and whether threads are damaged. Bonded seals are durable, but improper installation can still cause failure.

The strength of bonded seals lies in their hybrid design, combining metal reinforcement with elastomer flexibility. They are widely used in hydraulic, pneumatic, automotive, and energy equipment. For distributors and wholesalers, understanding these applications and advising customers accordingly not only improves satisfaction but also builds stronger business relationships.