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1. Unstable pipe support, loose pump base or anchor bolts are common causes of vibration, bolts must be fastened around to avoid loosening.
　　
2. Liquid gas, carefully check the pump and inlet pipe sealing surface bolts are loose, the gasket is damaged, the pump and piping system components are damaged.
　　
3. Pump and motor shaft is not the heart, should be adjusted, with the belt rotation, the rotation band is too loose or poor contact, can also cause vibration. Pump impeller imbalance in the operation of the impeller wear and tear or individual impeller runner clogging easily lead to vibration, sometimes due to shaft bending impeller bad balance caused by vibration.
　　
two. Noise increases during operation
　　
1. Bearing noise: the sound source bearing installation site, usually with a screwdriver or screwdriver to place the bearing installation, with ears, as crashed sound.
　　
Motor noise: General is howling, can only replace the motor.
　　
Cavitation noise: the sound source in the pump chamber, crackling crackling sound. three. Motor hot China Pump Technology Forum
　　
The outer wall of the motor is hot, it may be overcurrent operation, can close the small outlet valve, adjust to the rated current operation, it may be the motor coil quality problems, it can only replace the motor.
　　
2. Rotating parts appear friction, frictional resistance increases, it may over-current so that the motor is hot should stop checking whether the rotor is flexible.
　　
Motor bearing fever, the bearing may be lack of oil or damage, the need to repair or replace the bearing.
　　
Working voltage is too low, check the circuit to adjust the voltage.
one. Vibration during operation