Description: lowest flow at which the pump can operate without exceeding the vibration limits imposed by this International Standard; Name: lowest ongoing stable flow
Description: Lowest flow at which the pump can be operated without it adversely affecting ist performance in terms of life expectancy, noise and vibrations ; Name: Minimum continuous stable flow
Description: NPSH-value required for a drop of 3 % in the total head of the first stage of the pump as a standard basis for use in performance curves; Name: Net positive suction head required for a drop of 3 %