一区二区三区国产高清在线播放_日韩 高清 超清 有码 无码_韩国全部三级理论在线观看_日韩成人影视一区二区中文字幕_久久久中文字幕网站_老子影院午夜伦手机不卡国产_成人三级片免费免费_波多野结衣av在线天堂_又大又爽在线观看黄网站_(凹凸視頻)国产天堂网

Series and parallel connection of water pumps

The series of the pump
 
The series of pumps mainly solve the problem of insufficient head, after the series of pumps, its flow unchanged, head is the sum of the two pumps.In practice, in order to avoid the water inflow of the downstream pump to the upstream pump is not enough, the downstream pump flow is usually adjusted to the best condition to ensure that the upstream pump water inflow is sufficient.
Of the pump in parallel
 
Pump parallel refers to a number of pumps share a common outlet pipe.Each pump has a separate check valve.Pump parallel operation, the same head under the flow added.