Product DescriptionR-51200 Series Segmented Ball valves features V/C type ball in valve trim , work wit positioner to modulating the fluids. Spring Load seat remains the ball in contact with seal during rotation, which produces a shearing effect as the ball closes and minimizes clogging.The V ball produces an equal-percentage flow characteristic , it has good range ability, control  and shutoff capability, also the self clean function make it suited to control erosive , viscous,and slurries containing entrained solids or fibers.Product Parameters      (1)Temperature Range : -196℃~538℃(2)Plug seal packing: self-sealing packing system Graphite Packing system(3)Leakage: ANSI B16 104 CLASS V(4)Flow characteristic : Approximate  Equal% (5)Range ability : 200:1(6)Flange connection standard: JB/T 79.1-94~JB/T 79.4- 94/HG20616-97