技术范围 Technical specification 设计依据 Design reference | GB标准 | 设计标准 Design standrd | GB12238 | 结构长度 Face To face | 对夹连接 Wafer connecting | GB12221 | 对夹法兰尺寸 Wafer Flange Size | GB12221 | 试验和检验 Test&inspection | JB/T9002 | 注:系列蝶阀结构长度及连接法兰尺寸可根据用户要求设计制造。 Note:The structural length and connecting flange size of butterfly valve serles can be designed and manufactured as perusers'requirements. 主要零件材质表 Form of Major Parts Materials 序号 NO | 零件名称 Accessory name | 材质 Material | Z | C | P | 1 | 阀座 Seat | 橡胶 Ruber | 2 | 圆柱削 Straight Pin | 45钢 45 Steel | 不锈钢 Stainless Steel | 3 | 蝶板 Butterfly Plate | 灰铸铁镀硬铬 Grey Cast-iron Hard Chrome Plating | 碳钢或不锈钢 Simple Steel or Stainless Steel | 不锈钢 Stainless Steel | 4 | 阀体 Body | 灰铸铁 Grey Castlron | 碳钢 Simple Steel | 不锈钢 Stainless Steel | 5 | 螺柱 Stud | 35钢 35 Steel | 碳钢 Simple Steel | 不锈钢 Stainless Steel | 6 | 阀杆 Stem | 45钢 45 Steel | 不锈钢 Stainless Steel | 7 | 键 Key | 45钢 45 Steel | 不锈钢 Stainless Steel | 8 | 衬套 Bushing | 铜基粉末冶金 Copper Base Powder Metallurgy | 9 | O形圈 O Ring | 橡胶 Ruber | 10 | 气动装置 Pneumatic Device | | 11 | 位置指示器 Location lndicator | 塑料 Plactic | |