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What is a rod seal?

There are so many different types of seals out there that it might be hard to understand all the different terminologies and functions. In this article,

we give you our guide to what rod seals are, how they are manufactured and why you should choose rod seals from Martin’s Rubber.

Rod seals are often the decisive factor in ensuring that a

hydraulic cylinder operates at peak performance. Leakage through the rod seal can lead to environmental damage and accidents, which is why it’s crucially

important to select the correct seal for your application. While leakage past a piston seal will affect its efficiency, the system fluid or gas remains

contained in the system. With a rod seal, failure will allow external leakage, and it should be paired with an appropriate wiper and gland housing design to

ensure correct operation.

How do rod seals work?

Rod seals perform the difficult balancing act of creating a seal at both high and low pressure. This is often in combination with alternating high and

low temperatures. As such, they need to leave an oil film, thin enough to return into the cylinder, after having passed an effective wiper seal.