Seal Pin Design Best Practise Help

[DekX]

Hello all,

I have a leak path that I would like to redesign and am looking for best practice help.
I have a hollow stainless steel pin that needs to be insulated (separated from an outer SS pipe) via a PEEK or PTFE cylindrical insulator.
I'm worried that lubricant (oil as an example will) squeeze through between the pin and the insulating material (shown in green in the attachment).
On a side note, there is a but screwed to the top of the pin thus I suppose f the oil does get it, it will to some degree be stopped by the but thread near the top (not shown).
Any suggestions? Perhaps someone can direct me to an online design example?

Thank you.

DekX

http://files.engineering.com/getfil...938-4a8f-9cdd-4daed41d1dfa&file=Pin_Issue.png

 

[flexibox]

Not sure of the cross sections of the components but you can put small section orings (2.62mm) on OD and ID. If you include some dimensions we can send you a sketch to see if it works for you. Also indicate where the thread is.

Cheers

 

[DekX]

Thanks for the reply, I've added a couple of dims for you and a 3D pic to give some cross sectional insight.
There is no thread actually between the insulating material and the pin. Perhaps there should?
Thanks

http://files.engineering.com/getfil...cd-47d2-8458-62a88976f763&file=Pin_Issue2.PNG

 

[flexibox]

please refer to the attached which will work a treat make sure surface finishes are good