商品名称： 320D法兰式中线蝶阀系列 商品编号： 320D 型号：320D法兰式中线蝶阀系列 规格：DN50～DN2200 温度：-15℃～150℃ 压力：0.6MPa～1.6MPa 阀体材质：灰铸铁、球墨铸铁 阀板材质：球墨铸铁电镀、尼龙、不锈钢 阀座材质：EPDM、NBR 阀杆材质：碳钢、不锈钢 Type: 320D Double Flange Butterfly Specification: DN50 - 2200 Temperature: -15℃ ~150℃ Pressure: 0.6MPa/1.6MPa Materials of Body: Ductile Iron (GGG40, GGG50).Cast Iron (GG25), Stainless Steel Materials of Disc: Stainless Steel. Nickel Plated Ductile Iron,Ductile Iron Coated Nylon Materials of Seat: EPDM. NBR. Materials of Stem: Stainless Steel . Carbon Steel