High temperature flexible seal

[yanikomer]

I am working on a project where I need a high temperature sealing element. You can see the system in the attachment.

My moving object is moving linearly in a motion slot which is constructed on a sheet metal plate. But the surrounding temperature in this process is 500 C degree and there must be a flexible sealing element which does not let any particules or liquid material (oil etc.) to the behind of the sheet metal plate. As you see in the photo, I want the clearance between moving object and the sealing element as small as possible.

Does anyone know such a flexible sealing element that I can use in such a high temperature level and it also allows the motion of the moving object?

Thanks
yanikomer

 

[mhmounty]

Is this seal meant to hold the pressure of a fluid? Or does it just need to provide a physical barrier, e.g., splash protection?

 

[yanikomer]

Yeah it is just for splash protection.

 

[mhmounty]

If it's just splash protection, something set up like opposing paint brushes might work out pretty well. You see guards like that on the lever-style emergency brakes of some cars. You're a bit below the melting point of Aluminum, so it might be an option. Problem is, you're going to be hard-pressed to find a good metal that won't oxidize over time, if this is in an oxygen-containing environment. 500C is hot, and a lot of things are mobile at that temp.

What about a movable seal? In the drawing you have, it specifies that the seal be a stationary thing. Does it have to be? I think it would be much easier to have the seal move along with your object, if it's guarding something behind it. It just depends on the other parts of your design spec.

 

[alphy]

I understand the importance of finding a high temperature flexible seal for your project. Based on the information provided, I would recommend looking into using a high temperature silicone-based sealant or gasket. Silicone is known for its ability to withstand high temperatures and can also maintain flexibility, making it suitable for your application. Additionally, silicone is resistant to oils and other liquids, ensuring that no particles or liquids can pass through the seal.

Another option to consider would be using a graphite-based seal. Graphite has excellent thermal resistance and can withstand temperatures up to 3000 C degrees. It also has good flexibility and sealing properties, making it a suitable choice for your project.

It is important to note that when working with high temperatures, it is essential to choose a sealant or gasket that is specifically designed for those conditions. It is also important to properly install and maintain the seal to ensure its effectiveness. I recommend consulting with a materials engineer or conducting further research to determine the best sealing element for your specific project. Best of luck with your project.