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Common Causes of Failures in Progressive Cavity Pumps

Progressive cavity pumps are critical for oil and gas, pulp and paper, chemical, food and beverages, and wastewater treatment businesses. They work on the principle of rotary positive displacement. Progressive Cavity Pumps are intended to deal with viscous liquids and slurries with solids and particulate matter at a consistent flow. These pumps contain a rotor and a stator with a fixed size in the middle between them. The performance of a progressive cavity pump entirely relies upon these basic parts.


These pumps are intended to oppose high temperatures and unforgiving working circumstances. Be that as it may, considering the sort of strain these pumps bear and the general wear they go through, they require occasional support, and fix, and may likewise require new parts. Many elements might influence the presentation of these pumps over the long run. What are those factors that pump manufacturers should keep in mind?

Common Reasons for Failures of Rotors and Stators in Progressive Cavity Pumps

Of all the ever-evolving progressive cavity pump spare parts, the stator and rotor might be supplanted more frequently than the others. Here is a portion of the normal reasons for disappointment in rotors and stators:

Wear and Tear of the Stator: The stator's consistent turning activity makes grating to some degree. This prompts mileage throughout the time. The recurrence at which destructive and rough liquids, cruel synthetics, and semi-strong materials are moved through the pump additionally chooses the requirement for substitution of the part.

Mileage of the Rotor: The shaft-formed rotor can be produced using different grades of hardened steel. While it very well might be prudent to supplant the rotor and the stator simultaneously, the rotor doesn't wear out as quickly as the stator. Notwithstanding, if you manage semi-strong liquids, it is prescribed to change both the rotor and stator in one go.

Wear Because of Abrasion: While the plating on the rotor becomes broken down, it causes scraped area, which influences the association between the rotor and the stator.

Corrosive Assault: The rotor might experience a corrosive assault if the pH of the liquid falls under 6. This strips off the plating bringing about a harsh surface.

Cyclic Stress: If the rotor isn't embedded as expected during establishment, the external piece of the rotor can encounter unnecessary movement. This outcome in cyclic pressure and resulting exhaustion disappointment of the rotor.

Run Dry: if there should be an occurrence of a stator, its elastomer can foster breaks on the off chance that a pump dries up, with next to no liquid.

Hysteresis: in the event of an overabundance of tension on the elastomer, a condition called hysteresis can happen. This happens because of the maturing of the pump; notwithstanding, untimely hysteresis might happen because of inappropriate rotor inclusion or erroneous profundity setting.

Locked Induction Motor: Because of a secured enlistment engine, the three-stage windings of a stator might be harmed.

All these progressive cavity pump parts together function as cohesive units and contribute in their own way to getting the fluid through, no matter how vicious it is. The rotors and stators are almost like the heart of the pump and like any other machine or equipment, they need to be maintained well. If you discover any changes in the operations of your pumps, find out if they need to be replaced or repaired. Risansi Industries Ltd. is a trusted supplier and industrial pump manufacturers in India of a variety of progressive cavity pumps and spare parts with 100% equivalency to top international brands. Visit the website for more information.

Location: Canada

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