O-ring is a gasket with a circular-looped design that’s used to seal two working surfaces. The valve stems in automotive engines, for example, often use O-rings to prevent oil from entering the combustion chamber. The O-ring creates a air- and liquid-tight mating surface between the valve stem and the valve guide. Without this small and otherwise simple component, oil may leak into the valve guide where it’s burned inside the combustion chamber.


Materials Used to Make O-Rings.

O-rings are available in many different materials, each of which has different properties. Some of the most common materials used to make O-rings include the following:

Viton: Often used in applications where heat is a problem, viton O-rings are heat-resistant, durable and long lasting.

Silicone rubber: Featuring a soft, spongy design, silicone rubber O-rings are used in the food service industry because they are safe and non toxic.

Grease and hydraulic fluids: Buna-N o rings, also known as nitrile o rings, are best to use where there is a lot of grease or hydraulic fluid around.

 

Why do I get the feeling that this is going to end up being a spam account?

 

Its ironical that we are talking about things that go in circles.