Operation & Maintenance Process Equipment

Sundyne pumps and Typical start-up procedure.



Sundyne Pumps

Sundyne Pumps have unique design which offers the ability to optimize efficiency, pump curve shape, NPSH,  run out horse power and radial loading to provide economical, reliable operation for your conditions of service through various combinations of impeller, diffuser and inducer geometry.

Sundyne pumps deliver partial optimum efficiency at high head, low flow. For a given speed and diameter, the open radial vane impeller generates a higher head than a backward swept impeller. A single divergent conical diffuser is sized to control the maximum flow rate and efficiency recovers velocity head developed by the impeller. Pump efficiency is not affected by impeller axial clearance.

Sundyne pumps are mainly used in Petrochemicals / Petroleum refining, Power generation, Inorganic chemicals, paper processing, food processing, mining and spraying.

Sundyne pump start-up procedure

  1. Start the auxiliary oil pump, if installed.
  2. Pressurize the seal buffer system, if provided.
  3. Open the pump suction valve 100%.
  4. Open the seal vent port, either port #5 or #6 (please check from vendor manual).
  5. Open the pump discharge valve 25%.
  6. Start the main pump motor and observe the flow rate and discharge pressure.
  7. Adjust the discharge valve for the pump operation with the recommended flow limits.
  8. Shut down the auxiliary oil pump within two minutes of main motor start-up.

Attention!! Never start or operate the pump against a closed discharge valve. Always check to ensure that the discharge valve is open to design conditions.

9. On units with heat exchangers, once the gearbox oil temperature has stabilized, adjust the cooling water flow unit the oil sump temperature is 140°F-160°F (60°C-71°C). Maximum recommended temperature is 180°F (82°C). Recommended setting for temperature switches are alarm at 180°F (82°C) and shut down temperature at 200°F (93°C).


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