Audo Look6.0 downloadDetermine the specific type of pump, after the pump that introduces what series is chosen, can press the largest flow, the lift after enlarge 5%——10% surplus this two individual character can be main parameter, in model chart pursues or series determines specific type on characteristic curve. Use pump character curve, place is found to need to shed value of a quantity on the abscissa, place is found to require lift cost on ordinate, mix up respectively from two values draw vertical line right or horizontal, as it happens of two lines node falls on characteristic curve, criterion the pump that this pump should choose namely, but this kind of good case is general won't very few, connect regular meeting to touch fluctuation to list a few kinds of situations:
A, the first kind: Point of intersection is in characteristic curve upper part, this explains discharge satisfies a requirement, dan Yang Cheng is insufficient, right now, if lift photograph is about the same, or differ 5% the left and right sides, still can choose, if lift differs a lot of, choose the pump with bigger lift. Or try to reduce pipeline obstruction loss. B, the 2nd kind: Point of intersection is in characteristic curve lower part, inside limits of echelon of shape of fan of pump character curve, preliminary place this type, differ according to lift next how many, will decide whether cut impeller diameter, if lift differs very small, not cut, if lift differs very big, need Q, H by place, , according to its Ns and cut formula, cut impeller diameter, if point of intersection does not fall inside limits of fan shape echelon, should choose the pump with lesser lift. When choosing pump, need a consideration to produce craft demand sometimes, choose curve of character of different figure Q-H. TAG: ? Http://www.pump-sale.com/pumps_cl.asp of Qi bell disclose
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