Sealing for Valve

[cervantes]

Hello,

in my products I'm using Coprax valves.

http://coprax.com/prow.php?prow=000copr2show&id=1&mode=0&item=18&cat=0&psq=

after 1-2 months seal is broken - material simply sucks.
Environment is: clear water, max 90C.
So my question is simple - what kind of rubber/silicone do you suggest? I need to order my own seals - that's the only solution.
Have you got similar problems in past?

 

[btrueblood]

EPDM, aka Ethylene Propylene, aka EPR. Don't know what type of rubber the valves originally had, the literature from the site you posted does not list it.

 

[flexibox]

I agree with btrueblood when fitting be very careful that you do not use mineral oils to lubricate as the oring will swell. An alternative is Nitrile but you need to check the max temperature limits.