Technical Parameters Parameter Specification Model Fisher Vee-Ball SS-84PSV4 Type Rotary V-Notch Ball Control Valve Valve Size 8 inches Body Material Stainless Steel (CF8/CF8M) Actuator Type Spring-Return Piston Actuator (Fail-Safe) Flow Characteristic Equal Percentage Shut-Off Class ANSI Class VI (Bubble-tight) End Connections Flanged (Likely ANSI Class 150 or 300) Ball & Stem Material Stainless Steel Seat Material Reinforced PTFE (RPTFE) or UHMW-PE Temperature Range -40°F to 400°F (-40°C to 204°C) with standard polymeric seats. Pressure Rating ANSI Class 150: 275 psig (19 bar) or ANSI Class 300: 720 psig (49.6 bar) Flow Capacity (Cv) Approximately 2050 (for an 8" Class 150 V-Ball)
