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Valve ball: Floating and trunnion Ball NPS 2"~44"(DN50~1100) Pressure Rating: Class 150~2500(PN16~420) Base Material: ASTM A105, LF2, F304, F316, F316L,F6A, F51, F53, 630(17-4pH). Tungsten carbide,Chrom carbide. size:1/4"---44".