全国水泵生产企业有千百家，部分地区拼装的家庭式私营企业较多，产品质量良莠不齐，这给选购带来困难。选购要点如下： 　　一、根据所需的流量、扬程、轴功率、效率、必需气蚀余量 (或吸程 )和使用条件，初步确定泵的型号、名称，选择额定值与所需参数相同的泵。 　　二、首 There are thousands of pump manufacturers in the country, and more home-style private enterprises are assembled in some areas. Product quality varies greatly, which brings difficulty in purchasing. Purchase points are as follows: First, according to the required flow, head, shaft power, efficiency, the necessary residual cavitation (or suction) and the conditions of use, initially determine the pump model, name, select the desired rating and the same parameters Pump. Second, the first