Gear Pump

GEAR PUMP

Gear pumps are positive displacement pumps that use interlocking gears to move a fixed volume of fluid with each rotation, delivering a consistent, pulse-free flow. They are particularly effective for handling high-viscosity fluids like oils, resins, paints, and liquid soaps.

 

1. Types of Gear Pumps

Gear pumps are categorized by their internal arrangement, which determines their suitability for different pressures and fluid types.

  • External Gear Pumps
    • Design: Features two identical gears (a driver and an idler) side-by-side.
    • Performance: Capable of sustaining higher pressures, often up to 3000 psior more, due to rigid shaft support.
    • Best For: High-volume transfer of viscous fluids, hydraulic power systems (e.g., tractors, lifts), and lubricating oil services.
  • Internal Gear Pumps
    • Design: Uses one smaller gear rotating inside a larger gear of a different size.
    • Performance: Better suction capabilities and smoother, quieter operation than external models.
    • Best For: Shear-sensitive fluids (like chocolate or cosmetics) and high-temperature applications (up to 400°C).
  • Micro Gear & Metering Pumps
    • Design: Compact, often magnetically coupled units designed for precision.
    • Performance: Delivers extremely precise dosing, sometimes as low as <1 ml/min.
    • Best For: Laboratory dosing, medical diagnostics, and chemical additive metering.