Everything you need to know about O-rings and seals

Sep 21, 2020

What is an O-Ring?

The O-ring has been around since the dawn of the 20th century. Amazingly, the overall design of the O-ring has remained the same although the type of material used has changed. However, in their simple form, they are extremely straightforward and reliable.

How Do They Work?

They take their name from their shape and they are developed to create a leak-proof seal between two components to prevent gases or liquids from escaping. Essentially, they are a form of gasket but the difference is that they are used in high-pressure environments. They sit in a groove or a channel between two surfaces that are then pushed together. The more pressure placed on the join, the more distorted the O-ring becomes, improving the seal up to a certain point.

How To Use O-Ring Seals

These are commonly found in pumps, valves, connectors and cylinders. The seal joins between separate components. These components can be static, dynamic, hydraulic or pneumatic and so, O-rings provide a flexible solution. Even when the compression forces are removed, the O-ring will return to its shape but over time it will need to be replaced.

Static and Dynamic O-ring Seals

Static O-rings are developed to make contact with two or more surfaces that do not move relative to each other. A dynamic O-ring will work with moving parts to provide a seal. In most instances, static O-rings are made using hard-wearing materials, however, the components used in a dynamic environment are carefully developed so they do not abrade, shear or destroy the O-ring. Dynamic O-rings will require more frequent lubrication as well as maintenance.

What Are They Used For?

O-rings are used in many ways and there are O-rings that are developed for a range of uses.

This can include O-rings that are made for:

● High-temperature sealing
● High-pressure sealing
● Chemical resistance sealing
● Engines
● Food and Beverage Industry
● Aerospace
● Chemical/Petrochemical Industry
● Co2/Gas applications

They are also manufactured using an array of materials and that means that they are suitable for different purposes. There are Viton O-ring seals, Nitrile O-rings, Silicone O-rings, Fluorocarbon O-rings, NBR O-rings and more.

O-rings are an integral part of many processes and provide an effective solution to prevent the leaking of gases and liquids.

To learn more on how NES’ O-rings and Seals can benefit your business, contact the NES Sales Team at sales@nes-ips.com