Pipeline centrifugal pump maintenance and working conditions
Maintenance of pipeline centrifugal pump
1. Maintenance during operation:
(1) The inlet pipe must be filled with liquid, and it is forbidden to run the pump for a long time under cavitation.
(2) Regularly check the motor current, and it must not exceed the motor's fixed current.
(3) After the pump has been running for a long time, if the noise and vibration of the unit increase due to mechanical wear, the unit should be shut down for inspection. If necessary, the vulnerable parts and bearings can be changed. The overhaul period of the unit is generally one year.
2. Maintenance of mechanical seal:
(1) Mechanical seal lubrication should be clean and free of solid particles.
(2) The mechanical seal is strictly prohibited to work under dry grinding conditions.
(3) Rotate the pump (motor) for a few turns before starting to avoid breaking and damage to the graphite ring due to sudden starting.
(4) The leakage tolerance of the seal is 3 drops/min. Otherwise it should be checked.
Working conditions of pipeline centrifugal pump:
1. The suction pressure is ≤1.6MPa, or the maximum working pressure of the pump system is ≤1.6MPa, that is, pump suction inlet pressure + pump head ≤1.6MPa, and the pump static pressure test pressure is 2.5MPa. Please specify the system working pressure when ordering. When the working pressure of the pump system is greater than 1.6MPa, it should be separately stated when ordering, so that the flow-through part and the connection part of the pump are made of cast steel during manufacturing.
2. Ambient temperature <40℃, relative humidity <95%.
3. The volume content of solid particles in the conveyed medium does not exceed 0.1% of the unit volume, and the particle size is less than 0.2mm.
Note: If the medium used is with fine particles, please specify when ordering so that the manufacturer can use wear-resistant mechanical seals.
