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Pumps start up, shutdown and maintenance procedure

 Pump start-up, shutdown, and maintenance procedure

Startup procedure:

  • Verify that all piping and related equipment are clear of debris, clean, and leak-free and that all pipe connections are tight.
  • Make sure that all auxiliary services are connected and in place, and provide enough flow and pressure for flushing pumps with mechanical seals that have been flushed.
  • Verify that all auxiliary services are connected and in position, that the pumps are equipped with fluid barrier devices on the front cover/rotor case joint, and that rotor case port connections have enough flow and pressure.
  • Make sure that the drive and pump are lubricated. the oil sight glass, which has to be put in the top tapped hole on the side of the gearbox cover for pump oil capacities and grades, should be filled to the level of the concept SQ pumps, which are sent empty.
  • Verify that the system's exterior relief valve is adjusted appropriately if one is included. it is regarded as best practice to set the relief valve lower than the system design pressure for commissioning reasons. after commissioning is finished, the relief valve has to be adjusted to the application's specified value. the needed setting must never be higher than the system design pressure or the maximum pressure rating of the pump.
  • Make sure that the piping is clear of any impediments and that the suction and discharge valves are both completely open. Since concept SQ pumps have positive displacement, they should never be used in conjunction with a closed valve. Doing so might cause a pressure overload, which could harm both the pump and the system.
  • Make sure that the drive shaft is rotating in the proper direction for the needed flow.
  • Before beginning the pump, make sure the product is in the suction vessel. this is crucial for pumps that have single mechanical seals and aren't being serviced with a quench or flush since the sealing arrangements on these pumps must never be allowed to run dry.
  • It is considered best practice to briefly start and stop the pump before starting it up to verify the direction of rotation and make sure there are no obstacles in the way. after this is finished, start the pump and observe the suction and discharge pressure gauges visually. if at all feasible, monitor the pump's temperature and power consumption.

Shutdown Procedure:

Close the discharge and suction valves as soon as the pump is turned off, and make sure you follow all required safety measures. these are,
  • The power source for the primary mover has been separated.
  • The auxiliary services for mechanical seal flush, rotor case port connection barrier flush, and front cover barrier flush have been completely emptied, depressurized, and isolated where applicable.
  • That all heating and cooling equipment has been completely emptied, depressurized, and isolated when used.
  • The piping and pump head have been emptied and cleaned. 

Maintenance procedure:

  • Check for leaks in mechanical shaft seals.
  • Examine the oil levels often.
  • After 3000 RPM Hours or 12 months, whichever comes first, change the oil. Regarding lubricant grades and capacity. 

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