o-ring source

[Tanks A Lot]

[...]if I want to achieve dynamic sealing at a depth of 100 meters, what material or hardness of O-rings would be more suitable for my needs?[...]

I do not think you give enough specifics to properly answer the question. Things you would need to think about:

• What is being sealed - Is it a specific gas or liquid? What gets sealed plays a major role in material selection.
• What type of dynamic seal is this - Is it reciprocating, oscillating or rotary? This plays a major role in groove design as well as a small role in material selection.
• What are the temperatures expected? This plays another key role in material selection.
• What is the friction coefficient of the sliding work-piece a well as the one holding the groove? Is the parts performance dependent on low friction or is it something different, say a turret on a first stage?
• What type of groove is this and how big is it?
• Are the parts being taken apart regularly or is compression set a major influence?
• ....

The above list goes on for quite a while. O-ring selection and part design are extensively documented in the literature. Harder durometers don't always mean better.

I suggest you read Eriks and Parkers handbooks, as these will answer most questions that you may have.

 

[Water bird]

I do not think you give enough specifics to properly answer the question. Things you would need to think about:

• What is being sealed - Is it a specific gas or liquid? What gets sealed plays a major role in material selection.
• What type of dynamic seal is this - Is it reciprocating, oscillating or rotary? This plays a major role in groove design as well as a small role in material selection.
• What are the temperatures expected? This plays another key role in material selection.
• What is the friction coefficient of the sliding work-piece a well as the one holding the groove? Is the parts performance dependent on low friction or is it something different, say a turret on a first stage?
• What type of groove is this and how big is it?
• Are the parts being taken apart regularly or is compression set a major influence?
• ....

The above list goes on for quite a while. O-ring selection and part design are extensively documented in the literature. Harder durometers don't always mean better.

I suggest you read Eriks and Parkers handbooks, as these will answer most questions that you may have.

Thank you so much! I will check out the book you recommended.

 

[happy-diver]

Tolerances, it's all about the tolerances, lathe vs a hand file, also dependent on the hands

Also dependent on the hands on the lathe