... . 4)Speed:2900r/min The ZB series self-priming centrifugal pumps of our company, short for self-priming pump ,manufacture in ... fixed permanent or semi-permanent sprinkler system, widely applied to irrigation of various farmlands, orchards, vegetable farms and nursery garden, it ... is not exceed one atmos, around 11meters. 50ZB65-8.8water irrigation pumps