Unbalance, according to DIN/ISO 1925, is 'that condition which exists in a rotor when vibratory force or motion is imparted to its bearings as a result of centrifugal forces.' An unbalanced rotor will cause vibration and stress in the rotor and its supporting structure.
Follow the guidelines from these standards to balance centrifugal pumps properly. Balancing is essential for minimizing vibration, increasing bearing life and minimizing downtime and repair costs.
