GH series gravel slurry pump is mainly employed for the transportation of highly abrasive materials whose particles are too large and cannot be transported by ordinary slurry pumps, such as granular coal transportation and dredgers, river dredging, mining and metal smelting blast slag, and the transportation of root crops, etc. In addition, the pump is equipped with a single-stage cantilevered structure and a half-open impeller, which has good flow-through capability and vapor corrosion performance.