Special EPDM (Ethylene Propylene Diene Monomers) solenoid valve seals are used for applications where high-pressure gases tend to be absorbed in standard rubber seals.
Solenoid valve plunger travel stroke is typically 0.020 to 0.050 in., depending on orifice size....
Another thing we've done is a special elastomer for use with water-based printing links. We think of ink as being almost benign, but sometimes it can be rather aggressive to certain materials, and swelling of the rubber typically causes a big problem in the dispensing valves for ink.
Peter...