Motor Overloading

Dear Chong

Motor Overloading when valve fully open
Check the performance curve and see if the Impeller diameter and Motor Kw
is in order .Otherwise trim the impeller to correct diameter ,bearing in mind that it must meet your duty
point required

When replacing a different size of pump, be sure to compare the duty point of both the pumps
Otherwise , you may have an oversized or undersized problem

When Increasing the capacity of pump . re calculate the delivery head
See earlier posting on this matter