Progressing Cavity Pump Technology

For power transmission and eccentric movements within the rotating unit, the pump requires a drive shaft that ends in encapsulated  pin joints at both ends. In Allweiler pumps, these are particularly simple and robust, and absorb the eccentric movement of the rotor trouble-free.

No other pump is as space efficient as this optimized design. It results in uniquely long service intervals (MTBF) because power is transmitted through replaceable, hardened bushings and pins. They reliably protect the other joint components from wear and can be easily replaced. The joints of Allweiler progressing cavity pumps are durable, oil-lubricated, solids-tight and overpressure-resistant.

The Allweiler design eliminates the need for an axial seal on the joint, which can quickly wear and/or be damaged by the constant movement of the components and any solids that may be present in the pumped fluid. Only a radial seal is required to seal the joint. The joint's protective metal shroud effectively deflects solids around the joint, providing additional protection.

The wear-resistant joint sleeves surround the joint and are held in place by two retaining straps.  Allweiler joints are oil lubricated, and the movement of the joint and the associated forced circulation of oil provide optimum lubrication and long service life.

Allweiler's block pumps feature a self-sealing, rust and dirt resistant connection between the drive and the pump. Quick and easy assembly and disassembly. Approximately 30% smaller shaft diameter, resulting in up to 50% less friction on the shaft seal. This results in less wear, longer life and lower replacement costs.

The bearing frame can be removed from the drive shaft as a complete unit. The shaft seal is accessible without further pump disassembly. The bearing bracket can be relubricated and the bearings are protected from splash water.

The innovative rotor geometry results in a 20% lower average sliding velocity, resulting in lower energy consumption (less drive power) and longer rotor life.

Patented process eliminates grooves and creates a shark-skin surface structure. Your benefit: Lower static and sliding friction, resulting in lower motor power and starting torque. Shaft seals last longer and require less motor power because the smaller diameter of the stub shafts reduces seal friction by approximately 50%.

The innovative honeycomb structure of our progressing cavity pumps allows the liquid phase of the pumped liquid to be absorbed by the stator surface. This minimizes hydrodynamic drag for greater efficiency and energy savings.

This technology, also inspired by nature, allows us to reduce the internal friction of the pump by up to 50% compared to conventional progressing cavity pumps. Reduced start-up and operating torques allow operators to move more fluid with significantly less effort and energy consumption.

The combination of the honeycomb structure and the shark's skin ensures a nearly frictionless flow with no turbulence, resulting in a smooth flow rate and a stable performance curve during operation.

Learn More about ALLDUR Stators^®

All Allweiler rotors and stators are manufactured in-house in Germany. This ensures consistent, superior quality for these critical components that determine pump performance and efficiency.

For stators, we have the ability to select the right elastomer from over 20 materials suitable for different media. In addition to the standard elastomers, Allweiler also offers Alldur®, a unique elastomer material. Our ALLDUR® stators offer up to five times longer service life, even with abrasive media.