Progressive Cavity Pump
Progressive cavity pumps are positive displacement pumps designed to handle viscous, shear-sensitive, and solids-containing fluids with smooth, continuous flow. Their unique rotor–stator design ensures constant volume transfer and reliable performance across a wide range of industrial applications.
Overview
A progressive cavity pump is a type of positive displacement pump, also known as an eccentric screw pump or cavity pump. It transfers fluid through the pump by the progressive movement of a series of small, fixed-shape cavities formed between a rotating rotor and a stationary stator.
Operating Principle
The rotor rotates eccentrically within the stator, sealing tightly against it and creating cavities of constant size. As the rotor turns, these cavities progress from the suction side to the discharge side, moving the fluid smoothly without changing the cavity volume.
Key Characteristics
- Positive displacement pumping action
- Constant flow rate independent of pressure
- Low pulsation and gentle product handling
- Excellent performance with high-viscosity fluids
Advantages
- Ideal for viscous, abrasive, or solids-containing media
- Capable of handling shear-sensitive fluids
- Stable and continuous flow
- Good suction capability
Comparison with Centrifugal Pumps
- Better suited for high-viscosity fluids
- Flow rate is less affected by pressure changes
- Provides smoother flow with minimal turbulence
Applications
- Wastewater and sludge handling
- Chemical and petrochemical industries
- Food and beverage processing
- Oil and gas applications
- Pulp and paper industry