Shijiazhuang Tianyuan Pump high head large capacity high performance professional manufacturer Shijiazhuang Tianyuan Pump CO., Ltd ... single casing gravel (sand) pump2) High head, large capacity, high efficiency.3) Good NPSH performance.4) Widely application: They are designed ... impeller. Meanwhile, it can still maintain a reliable sealing performance.3. The parts such as labyrinth, labyrinth locknut, ...