... centrifugal, one stage, single casing gravel (sand) pump2) High head, large capacity, high efficiency.3) Good NPSH performance.4) Widely application: They ... bearing assembly; these parts can be changed easily and have high accuracy and longer service life.4. Some fastening parts ... pumps, G/GH gravel pumps, SP/SPR sump pumps, series ZGB slurry pumps, series ZJ slurry pumps, sand pumps, mud pumps, ash ...