The use and trial operation of centrifugal pumps should meet the following requirements:
The steering direction of the driving machine should be the same as that of the pump;
2. Identify the direction of rotation of pipeline pumps and coaxial pumps;
3. Each fixed connection part should be free of looseness, and the specifications and quantities of lubricant added to each lubrication part should comply with the provisions of the equipment technical documents;
Parts with pre lubrication requirements should be pre lubricated according to regulations;
5. All indicating instruments and safety protection devices should be sensitive, accurate, and reliable;
The 6-wheel drive should be flexible and free of abnormal phenomena;
Before the trial operation of the high-temperature pump, the pump body should be preheated, and the temperature should rise uniformly. The temperature rise per hour should not exceed 50 ℃; The temperature difference between the surface of the pump body and the process pipeline with working medium inlet should not exceed 40 ℃;
8. Set up connection devices to eliminate the impact of temperature rise, and install bypass connection devices to provide cooling water sources.
Maintenance of centrifugal pump
1. Analysis of mechanical seal failure in centrifugal pumps: The shutdown of centrifugal pumps is mainly caused by the failure of mechanical seals.
2. Requirements after centrifugal pump stops running
After the centrifugal pump stops running, the inlet valve of the pump should be closed, and the valves of the auxiliary system should be closed sequentially after the pump cools down.
3. Storage of centrifugal pumps
An uninstalled pump should be coated with a suitable rust inhibitor on the unpainted surface. Oil lubricated bearings should be filled with appropriate oil, while grease lubricated bearings should only be filled with one type of grease and should not use mixed grease.
