Centrifugal pump commissioning method and precautions

Centrifugal pump test method and precautions for centrifugal pump test
The installation of centrifugal pump should be completed in advance according to the following items when the centrifugal pump and centrifugal pump are installed
1. Before starting the centrifugal pump, it is forbidden to run the pump with no-load and no-load. The test run with liquid shall be carried out according to the operating procedures specified above in the operating instructions of the centrifugal pump. For the forced lubrication system, the temperature rise of the bearing oil of the centrifugal pump shall not exceed 28 ° C and the temperature of the bearing metal shall be less than 93 ° C.
2. For centrifugal pumps with oil ring lubrication or splash lubrication system, the temperature of lubricating oil shall not exceed 39 degrees, and the temperature of bearing parts shall be less than 82 degrees.
3. When testing the centrifugal pump, the vibration value of the bearing of the centrifugal pump should also be checked. The vibration standard of the bearing of the centrifugal pump can refer to the vibration standard of relevant Petrochemical rotating machinery.
4. During the test run of the centrifugal pump, the operation of the centrifugal pump should be very balanced and noise free, the coolant and lubricating oil system should be normal, and the centrifugal pump and auxiliary pipelines should be free of leakage.
5. During the commissioning of the centrifugal pump, it should be noted whether the current of the centrifugal pump motor operates within the specified range. If the overcurrent indicates that the actual working condition head is lower than the pump head, it is recommended to turn down the outlet valve to control the flow of the centrifugal pump so that its current can be used within the rated current range.
6. The leakage of various seals and media of centrifugal pump shall not exceed the requirements of the following standards:
(1) Clean water centrifugal pump with mechanical seal: light oil 10 drops / min, heavy oil 5 drops / min
(2) Multistage centrifugal pump with packing seal: light oil 20 drops / min, heavy oil 10 drops / min
(3) For the magnetic drive pump conveying toxic, harmful, flammable and explosive media, no obvious leakage is allowed.

dry screw vacuum pump of rotor profile type