Size : 1⁄2” to 4” Body : ASTM A351 Gr. CF8/ CF8M/ CF3M Seat : Buna-N (Water)/ PTFE (Steam) Diaphragm : Buna-N (Water)/ PTFE (Steam) O-Ring : Buna – N Spring : Spring steel Adjusting stem : SS 304 End Connection : Screwed / Flanged Pressure Range : 10 – 35 PSI (Low Level) Temperature Range : 80°C (for Water), 180°C (for Steam) : Max Inlet 40 Kg/cm2, Outlet 12 – 25Kg/cm2, 20 –