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Specification: NO PART MATERIAL OTY 1 Body PVC,CPVC,PPG 1 2 Seat seal EPDM,FPM 1 3 DISC PVC,CPVC,PPG 1 4 Bolt SUS304 4 5 Stem STEEL/SUS304/SUS316 1 6 O-ring EPDM,FPM 2 7 Key STEEL 1 8 Gear box IRON 1 ...