I guess I should have provided more info. Wish i could include a picture. There is 42 foot of shafting between motor and pump with 2 additional bearings and 3 separate flexible couplings (shim pack type). The vibration at turn speed is below .05 in/sec. suction and discharge pipes are encased in...
I have a couple of 500 hp vertical pumps. Wastewater application, they are series centrifugal pumps. The pumps vibrate excessively readings are above 1.0 in/sec at 3 times turn speed. They have 3 vane impellers. Bump test indicates a natural frequency of the pump bearing case at 3 times turn...
I have a couple of 500 hp vertical pumps. Wastewater application, they are series centrifugal pumps. The pumps vibrate excessively readings are above 1.0 in/sec at 3 times turn speed. They have 3 vane impellers. Bump test indicates a natural frequency of the pump bearing case at 3 times turn...
