刀型闸阀Manual knife gate valve设计制造 Design and manufacture: JB/T8691-1998结构长度 structural length: GB/T15188.2-94法兰连接 Flange connection: GB/T9113.1-2000 JB/T79-94试验与验收 testing and acceptance: GB/T13927-92主要零部件材质 Key parts material 阀体、上盖Valve body, upper cap 铸铁，碳钢、不锈钢Carbon steel, stainless steel 阀板Valve plate 铸铁，碳钢，不锈钢stainless steel 阀杆Stem 不锈钢stainless steel 密封圈Seal ring 橡胶、四氟、不锈钢、硬质合金Rubber, PTFE, stainless steel,hard alloy 主要性能规范 Key performance indicators 公称压力Nominal pressure PN 壳体试验Casing test 1.5XPN 密封试验Leak test 1.1XPN 工作温度Operating temperature 橡胶≤80℃ 四氟密封≤180℃ 硬密封≤425℃Rubber 80℃, PTFE≤180℃, hard sealing ≤425℃ 适用介质Working medium 糖浆、纸浆、污水、煤浆、灰、渣水混合物Syrup, paper pulp, sewage, coal slurry, dust, slag-water mix