cf8m is a Sharpe Valve model # , 1000 CWP means it is rated for 1000psi Constant Working Pressure
8.9E10-6 in/inF at 70-212F
It means that the material of the Valve has been up to the ASTM Casting Specification ASTM A351 Grade CF8. Used for corrosive or extremely high temperature Non Corrosive services.
Stainless Steel version
CF8M is a low-carbon version of CF8, which are both types of stainless steel. CF8M has a higher chromium and nickel content, making it more corrosion resistant than CF8. CF8 is often used in applications where corrosion resistance is less critical compared to CF8M.
316 stainless
MVP is the medical abbreviation meaning mitral valve prolapse
Mitral stenosis is the medical term meaning narrowing of the mitral valve.
It is a casting of 316 stainless, with higher values of Nickel, Chromium, and Silicon.
shut down non return valve
wcb grade full form?
I don't know what valve means but you should go to dictionary.com and ask.