Operation flow of vertical multi-stage centrifugal pump

            Operation flow of vertical multi-stage centrifugal pump  

        Before operating the vertical multi-stage centrifugal pump, the pump body should be cleaned and the imported guide valve is opened, and the material is discharged to prevent the crystallization of the vertical multi-stage centrifugal pump operation process.Before starting the vertical multi-stage centrifugal pump, the necessary risk identification, risk assessment, risk mechanism and environmental factors should be analyzed in the operation process.
        Since all the vertical multistage centrifugal pump the water experiments before shipment, if you want to pumping chemicals will react with water (such as sulfuric acid), need to remove the line fully dry.Check the electromechanical power (frequency, voltage and electromechanical wiring).After confirming the completion of the priming note, after excluding the inlet system and the gas in the pump shell, check whether all valves of the vertical multi-stage centrifugal pump inlet system have been opened;High temperature should be held preheating, heating speed is 50 ℃ / hour, to ensure that all components are heated evenly.Because the vertical multi-stage centrifugal pump is about to cause the magnetic loss of bearing magnets, it is forbidden to operate in this kind of pump.
        Start the electromechanical, pay attention to the reading of the outlet pressure gauge of the vertical multi-stage centrifugal pump, if the pressure is unstable and fall to a lower value, indicating that the exhaust is not clean, the pump should stop immediately;Stop the pump for 10 to 15 seconds, hold the vertical multi-stage centrifugal pump to hold the pump from the beginning, and start the vertical multi-stage centrifugal pump until the outlet pressure reaches a higher value and remains stable.Turn off the outlet valve and start the vertical multistage centrifugal pump, when the motor reaches a steady speed, slowly open the outlet valve and outlet valve adjustment to get want to fuck for pressure and flow rate, such as user in vertical multistage centrifugal pump outlet is equipped with flow or pressure gauge, should by adjusting the pump outlet valve opening rated point as shown in the function parameter list, the measurement of mechanical and electrical current in vertical multistage centrifugal pump, the machine electricity within the rated current operation, otherwise will cause pump overload operation (i.e. large current operation, to make the mechanical and electrical burn) export adjusted valve opens large and small as well as the working condition of pipe.
          In the process of operation to pay attention to the minimum safety traffic of vertical multistage centrifugal pump, if no shaft seal pump operation flow rate is too low will make the pump temperature continues to rise due to lack of lubrication, vibration and radial force, axial force are higher, therefore, must have a minimum limit operation flow, in order to ensure the service life of the pump.