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Progressive Cavity Pumps

Progressive Cavity Pumps

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Progressive cavity, Helical rotor pumps

6 series from 1 manufacturers

What are progressive cavity pumps

Progressive Cavity Pump is a positive displacement pump, consisting of a stator & rotor designed to handle viscous, abrasive, and shear-sensitive fluids. The metal rotor drives the stator through the chain and begins to fill the cavities with an equal amount of liquid which then flows through the pump outlet. They are a highly robust pumping system that ensures optimum performance and reliability which allows for the ability to provide a smooth and pulsation-free flow, making them suitable for a wide range of applications across various industries.

Advantages of progressive cavity pumps

  • The large continuous cavities allow suspended solids to be handled with ease. The pumping action of progressive cavity pumps is steady and smooth, which results in low pulsation and a gentle flow of the fluid.
  • Low running speeds- make it ideal for abrasive applications.
  • High pressure pumps- eliminated the need for multiple pumps, when pumping with high head requirements or over long distances.
  • Progressive Cavity pumps tend to also be self-priming.
  • Tend to not vapor lock.
  • Progressive cavity pumps can handle a wide range of fluids and solids, including those with high or low viscosities, shear-sensitive materials, and corrosive or abrasive substances.
  • High Efficiency: Progressive cavity pumps are known for their excellent efficiency in handling viscous and abrasive fluids.

Where to use Progressive Cavity pumps

Progressive cavity pumps tend to be utilised in order to pump fluids that cannot typically be handled by other industrial pumps, making them great for:


AxFlow UK represents Mono progressive cavity pumps that have over 70 years experience.The progressive cavity pump principle is ideal for handling liquids that can be slurries, viscous, shear sensitive, 2 or 3 phase mixtures or when applications require, significant suction lift capabilities. The heart of the Progressive Cavity pump is the rotor and stator. As the single helix rotor revolves eccentrically within the double helix of the stator, a continuous cavity is formed and progresses towards the discharge end of the pump as the rotor rotates.

How To Maintain Progressive Cavity Pumps

It is ideal to check a progressive cavity pump for wear after roughly 700-1000 operating hours. The frequency of subsequent inspections is determined in relation to the degree of wear noted. It is suggested that the interval between inspections must however, not surpass 1500 operating hours. 

Cleaning Progressive Cavity Pumps:

  • Through the cleaning ports in the pump housing
  • Manually after dismantling the PC pump

The rotating parts of a pump tend to wear down overtime, which means that they typically need to either be exchanged or readjusted. Technological innovations haved allowed for quicker and easier access to the rotor and stator unit and even ways to readjust them for increased flow.

However, pumps with feed hoppers pose a unique challenge. Maintenance on such pumps tends to be rather complex and time consuming as a result of the valves and hoppers obstructing access to the pump.

Maintaining a progressive cavity pump involves several key steps to ensure its optimal performance and longevity. A progressive cavity pump is a type of positive displacement pump commonly used for transferring viscous fluids. Here's a brief overview of the maintenance process:

  • Routine Inspection: Perform regular visual inspections to identify any indications of wear, leakage, or damage. It is recommended to check the stator, rotor, coupling, and other critical components for any abnormalities.

  • Lubrication: Ensure that the pump is properly lubricated to minimize friction and wear between the rotor and stator. Use the recommended lubricants and follow the manufacturer's guidelines. Progressive Cavity Pumps cannot be run dry. However, dry run protection devices for instance, stator temperature probes, can be utilised as well as special sealing configurations which are able to mitigate pump faults from dry-running.

  • Cleanliness: Keep the pump and its surrounding area clean to prevent debris, contaminants, or foreign particles from entering the pump system. This can help prevent clogs and damage.

  • Seal Inspection: Check the seals and gaskets for any indiacations of wear or leaks. Replace them if needed to prevent fluid leakage and maintain efficiency.

  • Fluid Quality: Use the appropriate type of fluid and ensure its quality meets the Cavity pump's specifications. Contaminated or incompatible fluids can lead to performance issues.

  • Vibration and Noise Monitoring: Monitor the pump's vibration and noise levels during operation. Unusual vibrations or increased noise can indicate mechanical issues that need attention.

  • Spare Parts Availability: Keep a stock of key spare parts, such as stators, rotors, seals, and coupling elements, to facilitate quick repairs and minimize downtime.

Remember that specific maintenance requirements can vary based on the pump's design, manufacturer recommendations, and the type of fluid being pumped. Always refer to the manufacturer's documentation and guidelines for detailed maintenance instructions tailored to your specific pump model.

Can Progrerssive Cavityt Pumps run dry?

While progressive cavity pumps generally cannot run dry, some pumps are designed with enhanced dry-run capabilities for short durations. Manufacturers may incorporate features such as specialized stator materials, coatings, or other design elements to mitigate the negative effects of dry running.


How Progressive Cavity pumps work


How to select Progressive Cavity pumps



PD Pumps Team
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