暗杆阀杆不升降式刀型闸阀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 pressurePN壳体试验Casing test1.5XPN密封试验Leak test1.1XPN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