I have a question regarding the rated parameters of the pump
Thread Content
The flow rate, head, and flow rate corresponding to the pump’s rated point are the rated flow rate, right? Or is the head corresponding to the rated flow the rated head, and is the flow corresponding to the rated head the rated flow?
Yes, the two are two parameters at a specified operating point
If the head corresponding to the rated flow rate is the rated head, and the flow rate corresponding to the rated head is the rated flow rate, then according to the guidelines provided in the manuals for selecting industrial pumps, the rated flow rate is generally 1.1 times the normal flow rate, while the rated head is 1.05 times the normal head. On the performance curve of a centrifugal pump, when the normal flow rate is less than the rated flow rate, the head corresponding to the normal flow rate is greater than the head corresponding to the rated flow rate; meanwhile, the flow rate corresponding to the normal head is greater than the flow rate corresponding to the rated head.
People are asking about the relationship between rated flow rate and head, which has nothing to do with normal operating conditions
But the rated head and flow rate are higher than normal
The question is whether the head corresponding to the rated flow rate is the rated head. Flow rate and head are two parameters that appear together as a pair, relying on each other; they should not be explained separately
The rated head and rated flow rate represent a single point on the pump curve; however, during normal operation, due to the existence of the performance curve, it is usually difficult for these two parameters to correspond exactly to one point.
As long as it meets the usage requirements, the operating point is determined by both the pump’s characteristic curve and the device’s characteristic curve
The focus of the discussion is whether the rated flow point and the rated head point are the same operating point