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Sliding Vane Pumps Vs. Internal Gear Pumps


Comparison of Sliding Vane Pumps Vs. Internal Gear Pumps
Sliding Vane Pumps Internal Gear Pumps
Sliding Vane Pumps Internal Gear Pumps
  • Superior mechanical performance
  • Provides greater energy savings
  • 24% more efficient than gear pumps
  • Sliding vane pumps have a number of non-metallic vanes that slide into and out of slots in the pump rotor
  • When the pump driver turns the rotor, centrifugal force, rods and/or pressurized fluid causes the vanes to move outward in their slots and bear against the inner bore of the pump casing, forming pumping chambers
  • This fluid is passed around the pump casing to the
    discharge port
  • Each revolution displaces a constant volume of fluid
  • Variances in pressure have minimal effect
  • The sliding vanes automatically adjust to maintain near perfect clearances throughout operating life
  • Energy-wasting turbulence and slippage are minimized and high volumetric efficiency and low energy consumption are maintained
  • Internal gear pumps utilize an outer gear called a rotor that is used to drive an inner gear called the idler
  • The gears create a void as they come out of mesh - the volumes are reduced and liquid is forced out the discharge port
  • Each revolution displaces a constant volume of fluid
  • Variances in pressure has minimal effect
  • The metallic gears wear over time resulting in wider clearances; this increases energy-robbing slippage and significantly decreases volumetric efficiency
  • In order to compensate for performance degradation,
    pump speed is increased which requires greater
    energy consumption

Compare Energy Cost Savings