Products are widely used in oil, chemical industry, medicine, textiles, nuclear power, military and urban water supply and drainage, fire booster, high-rise building booster water, garden sprinkler, heating and cooling, such as cooling water cycle booster. Especially for vibration and noise for high places, such as key projects, pumping station, central air conditioning and so on. Can also be used to transport pressure and temperature does not produce the crystallization and solidification of liquid, in particular to the human body and the environment is harmful and unsafe liquid and precious liquid, etc., such as strong corrosive, highly toxic, volatile, radioactive and other media.