7, D155-67X6 multi-stage pump, pump shaft and mechanical and electrical shock is not in the same center line. Or shaft crooked material. The axial center of the pump and motor alignment, multi-stage pump, 8, D155-67X7 multistage pumps, bearings overheating. No oil. Pump and motor shaft not in the same center line. Come on. Aligned with the centerline of the shaft, checking or cleaning the bearing body. 3, when the pump head is less than 125 meters to actual needs, according to the pumping station area, pump prices (multi-stage pump is generally higher than the single-stage pump price), and other factors considered in the selection of a single-stage or multi-stage pump pump. Multi-stage pump, D155-67X6 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.