Seat inserts for valves

[utlandmah]

People,

Do you know where I can read more about peek, ptfe and rptfe, devlon which are used in the valve industry?

Also, do you know if Methanol is compatible with viton seals?

Regards,
Marcell

 

[mechengr77]

I am looking for similar material (seat and seal material) and their compatibility with Methanol. I have had little luck in the search.

 

[israelkk]

Look at valve catalogs. The manufacturer usually specify the materials the valve composed of.

 

[EdStainless]

You could also try the Compass corrosion guide for non-metallics. Good general ref.
For better data start looking to the resin makers, CP, Bayer, BP and so on.

= = = = = = = = = = = = = = = = = = = =
Still trying to help you stop corrosion.
formerly Trent Tube, now Plymouth Tube
eblessman@plymouth.com
or edstainless@earthlink.net

 

[meintsi]

1. see here .....

http://www.eng-tips.com/viewthread.cfm?qid=140998&page=1

2. No, Viton will start to swell in mixtures as low as 50% methanol at minimal exposure times. Much better choices would include EPDM, FKM, or natural rubbers. (FYI - NBR is NOT a natural rubber.)

Remember...
[navy]"If you don't use your head,[/navy]
[navy]your going to have to use your feet."[/navy]