E61 Valve Seals Rubber vs Viton

PartySausage

I was doing a strip down, clean & lube on the E61 group of my Synchronika today & although they are sealing at the moment I think the 3 valve seals/gaskets are going to need replacing next time I do it.
The current ones are I think NBR & I’ve found both NBR & Viton seals available with not that much of a price difference between them so wondered what folks thoughts were on either material in that application?

DavecUK

PartySausage The current ones are I think NBR & I’ve found both NBR & Viton seals available with not that much of a price difference between them so wondered what folks thoughts were on either material in that application?

ECM won’t have used NBR, they will be Viton

PartySausage

DavecUK Thanks Dave When I looked at the ECM interactive parts diagrams on Nuova Ricambi there were part codes for Rubber (Black) & Viton (Green) & although these were generic parts for a number of machines I thought that given the seals in my machine were black they might be the Rubber version

DavecUK

PartySausage I thought that given the seals in my machine were black they might be the Rubber version

FKM/Viton can come in black or green. NR has a number of good quality parts and also cheap ones!