The basic structure of the basic structure of the centrifugal pump centrifugal pump is sincere composed of six parts, namely: impeller, pump, multi-stage pump, shaft, bearings, D46-30X8 multistage pumps, seal rings, stuffing box 1, the impeller is the core of the centrifugal pump, it speed and high output force, D46-30X6 multistage pumps, impeller blades and played a major role, D46-30X7 multistage pumps, impeller assembly before by static test. Requirements on inner and outer surfaces of the impeller smooth to reduce flow friction losses. 1. The pump does not absorb water. Pressure gauge and vacuum gauge pointer severe beating. The injection pump enough water. Regardless of leaks and instrumentation. Beyond water within the pump. Tighten the leak at the blockage. 2, the pump does not absorb water. Vacuum gauge indicates a high vacuum. Bottom valve is not open or has been blocking group. Suction pipe too much resistance. Suction lift too high. Correction or change the bottom valve case. Or change the suction pipe. Reduce suction lift. 3, the pressure gauge. However, still water pumps. Outlet pipe too much resistance. Rotating in the wrong direction, the impeller clogged. Pump enough to check the number of revolutions or shorten pipe and check the motor. Remove water connection to clean impeller. Increasing the number of revolutions of the pump shaft. Multi-stage pump, D46-30X5 multistage pumps, mechanical seals (quality businessmen) Ltd provided by the Shijiazhuang-send pump. Shijiazhuang-school Pump Co., Ltd. (www.shipaipump.com) is specialized in "slurry pumps, submersible pumps, sewage pumps, chemical pump, pulp pump, water pump, mud pump, multi-stage" of the enterprise, the company of " honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Manager Xu.