4、进口管路可安装空气自控电磁阀，关机后自动消除泵内液体衡吸，实现“一次灌液，终身自吸”。50WFB-C无密封自吸泵,50WFB-C1无密封自吸泵,50WFB-C2无密封自吸泵,50WFB-CD无密封自吸泵,50WFB-E无密封自吸泵,50WFB-E1无密封自吸泵,50WFB-E2无密封自吸泵,65WFB-A无密封自吸泵,65WFB-A1无密封自吸泵,65WFB-AD无密封自吸泵,65WFB-B无密封自吸泵,350WFB-B2无密封自吸泵,350WFB-B3无密封自吸泵,350WFB-BD无密封自吸泵,16WFB-A自控自吸泵,25WFB-A自控自吸泵,32WFB-A自控自吸泵,40WFB-A自控自吸泵,40WFB-A1自控自吸泵,40WFB-A2自控自吸泵,40WFB-A3自控自吸泵,50WFB-A自控自吸泵,50WFB-A1自控自吸泵,50WFB-AD自控自吸泵,50WFB-AD1自控自吸泵,50WFB-B自控自吸泵,无密封自控自吸泵（即气液混合式）工作原理:无密封自控自吸泵主要由泵体、叶轮、泵盖、导叶、副叶轮、泵轴、连接架、停机密封、电动空气控制阀、出口止回阀等部分组成。16WFB-A无密封自吸泵,25WFB-A无密封自吸泵,32WFB-A无密封自吸泵,40WFB-A无密封自吸泵,40WFB-A1无密封自吸泵,40WFB-A2无密封自吸泵,40WFB-A3无密封自吸泵,50WFB-A无密封自吸泵,50WFB-A1无密封自吸泵,50WFB-AD无密封自吸泵,50WFB-AD1无密封自吸泵,50WFB-B无密封自吸泵,50WFB-B1无密封自吸泵,50WFB-B2无密封自吸泵,50WFB-B3无密封自吸泵,3、引用真空泵抽气原理，开机后，抽吸掉泵进口管路中的空气，达到自吸目的，占地面积小，安装使用方便。