The utility model discloses a negative pressure generator used by a water pumpsuctionpipe without a bottom valve.
本实用新型公开了一种无底阀水泵吸水管用负压发生器。
2
In order to water pumpsuctionpipe, memory, import needs bottom valve pump working, bottom valve caused great losses.
为了在泵内存水，吸入管进口需要装底阀，泵工作时，底阀造成很大的水力损失。
3
The water flow velocity in the suctionpipe, which is crucial for evaluating the performance on pumping fish, can be measured by the pumped water flow rate of the riser in an air lift pump system.