sundyne pump working principle

Sundyne Pumps

Sundyne Pumps have a unique design that allows for optimizing efficiency, pump curve shape, NPSH, run-out horsepower, and radial loading. This ensures economical and reliable operation under various service conditions through different combinations of impeller, diffuser, and inducer geometry.

Sundyne pumps deliver partial optimum efficiency at high head and low flow rates. Compared to a backward swept impeller, the open radial vane impeller generates higher head for a given speed and diameter. A single divergent conical diffuser is sized to control maximum flow rate while efficiently recovering velocity head developed by the impeller. Impeller axial clearance does not affect pump efficiency.

Sundyne pumps are primarily used in petrochemicals/petroleum refining, power generation, inorganic chemicals, paper processing, food processing, mining, and spraying applications.
Sundyne pump start-up procedure

  1. Start the auxiliary oil pump if installed.
  2. Pressurize the seal buffer system if provided.
  3. Fully open the pump suction valve.
  4. Open either port #5 or #6 (please refer to vendor manual) as the seal vent port.
  5. Partially open the pump discharge valve by 25%.
  6. Start the main pump motor and monitor flow rate and discharge pressure.
  7. Adjust the discharge valve to operate within recommended flow limits for the pump.
  8. Shut down the auxiliary oil pump within two minutes of starting up the main motor.

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

9.On units with heat exchangers: Once gearbox oil temperature has stabilized,
adjust cooling water flow until oil sump temperature reaches 140°F-160°F (60°C-71°C). The maximum recommended temperature is 180°F (82°C). Recommended settings for temperature switches are an alarm at 180°F (82°C) and a shutdown temperature at 200°F (93°C).