Pressure Class Asme 150 (20 Pn) Bonnet Type Closed Bonnetindustry Standard Asme B1634orb Trim T3 Standard Trimbody Material Wcc Carbon Steelcore A-105 Forgingoverlay Nickel Facestem Aisi 8620seat Material 410 Stainless Steelseat Insert Teflonfastener Grade Stud Grade B7 Fastener Grade Nut Grade 2hpacking Ring Materials Teflon Fire Safe Valve Operator Handwheelminimum Temperature -20maximum Temperature 500 Tempunits Frating Psi