Shut-Off Valve Design

[jhoule]

I am designing a shut-off valve. Can anyone guide me to design criteria relating seat load to achieve a specific leak class (for a given delta P) as a function of geometry and material properties?

 

[msmedesign]

We need more info about the design.
what kind of valve,application indo Pressure Temp, seat material..........

 

[jhoule]

I am targeting a poppet style valve (conical sealing surface) which mates to a soft seat (probably a polymer or other engineered plastic). I want to seal gas with a 3000 to 5000 psi inlet pressure. Ambient temps may vary between -40 and 80 deg C. Fluid temps should be maintained between 0 and 60 deg C. I am looking for some emperical data that will help in specifying suitable seat materials and desired contact pressure to achieve a seal within a specific leak class (tbd).