The difference between multi-stage pump with a single-stage pump, single-stage pump means that only one pump impeller, the maximum lift is only 125 meters; 2, multi-stage pump means there are two or more than two impeller pump D25-50 * 4 Multi-stage pump, can be multi-level segmentation times suction and pressure water, which will raise the water to a high position of multistage pumps, lift may need to increase or decrease the pump impeller series; multi-stage pump in a single stage When the pump needs to be equipped with two-stage lift motor, can increase the number to be equipped with four-wheel motor, which can improve the life of the pump and reduce the basic structure of the basic structure of the unit noise centrifugal centrifugal pump is part of Prudential six composition, namely: impeller, pump, pump shaft, bearings, seal rings, stuffing one, is a core part of the centrifugal pump impeller, speed and high output force it D25-50 * 6 multistage pumps, vane impeller also played a major role in the assembly before the impeller through the static equilibrium experiments. The inner and outer surfaces of the impeller required to be smooth to reduce flow friction losses. Multi-stage pump | D25-50 * 4 multi-stage pump | non-clogging sewage pump (certified merchants) provided by Shijiazhuang-school Pump Company. Shijiazhuang-faction Pump Co. (www.shipaipump.com) is specialized in the "slurry pumps, submersible sewage pumps, sewage pumps, chemical pumps, pulp pump, water pump, mud pump, multi-stage," the enterprise, the company adhering to the " honesty, hard service "concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Manager Xu.