I'm not a sealing expert, but I have the feeling, that it will be hard to find a sealing for the following application:
Sealing a piston with diameter approx. 1.5"
medium: air
velocity of the piston: up to 35 m/s (78mph)
differential pressure: 10 bar
temperature: min. 5F (-15°C) max. 400F...
There is a little shareware tool, which I can recommend for dimensioning calculations and similar technical and engineering calculations. You find it in the net under the URL:
http://members.vol.at/us/dimcalc
What is special with this calculator is that you can make calculations directly with...