How does an progressing cavity pump work?

Die kleine und servicefreundliche Exzenterschneckenpumpe CC44

A pump as a multi-talent: The progressing cavity pump is powerful and versatile. It is not even particularly sophisticated, but rather very performance-friendly and optimally adapted to the needs of its users, for example the biogas industry. But how does an progressing cavity pump work and where is it used? We discuss essential details and information about the Vogelsang "Allrounder" and why the QuickService is advantageous for users.

Design of the eccentric screw pump

progressing cavity pump belong to the category of rotary positive displacement pumps. These pumps are capable of handling a wide variety of media, from water to media that no longer flows on its own. Thus, highly viscous and abrasive materials can also be conveyed, a capability that is often required and distinguishes the progressing cavity pump.

In its design, the pump consists of a stator and a rotor. Between them there are conveying spaces, the size of which depends on the size of the pump. The stator is a fixed part, which acts as the opposite of the rotor. Therefore, the stator usually has a housing or a casing. The rotor is always the rotating part of the machine and in this case has a small core diameter and a large channel depth.

The operating principle of the progressing cavity pump

The technology on which the pump is based was invented in 1930 by the Frenchman René Moineau and is based on a rotor rotating in the fixed stator. Appropriately, the stator is also shaped to form cavities that trap the medium and move it from the suction to the discharge side. The continuing passage is used as a conveying channel through which materials, such as, biosuspension, liquid food waste or slurry are transported. The flow rate of the pump is related to the speed, which is why the pump can also be reliably used in areas of dosing technology.

Progressing cavity pump can transport a wide range of media in a pressure-stable and speed-proportional manner. Due to the large free ball passage, the pump is also suitable for use with materials containing foreign objects and impurities. In addition, it has a high pumping speed and has no suction and discharge valves.

The special advantages of using a Vogelsang progressive cavity pump are:

  • No disassembly of the pressure or suction side piping is required for service and maintenance
  • Small footprint and optimum service due to QuickService concept
  • Flexible part changes with many possibilities in the smallest possible space
  • Quality cartridge mechanical seal can be changed without opening the pump
  • Robust cardan shaft with protective sleeve for changing the rotor and stator without dismantling the protective sleeve

The CC series is a particularly low-maintenance progressing cavity pumpDue to its unique design, part replacement is quick and easy, and the technology shines with high efficiency. To ensure that your pump can be put back into operation as quickly as possible in the event of maintenance or a malfunction, there are several options for flexibly changing the rotor, stator or the seal.


Thus, the rotor can be replaced individually as usual. It is also of great advantage that the rotor-stator unit can be replaced as a unit in a short time. The protective sleeve on the cardan shaft does not have to be dismantled. But the entire rotating unit, consisting of the PTO shaft and rotor, can also be replaced in one piece without having to dismantle other parts. Or even the cardan shaft, rotor and stator. Customers can undertake the reconditioning of the replaced units themselves.

The Quality-Cartridge mechanical seal can be replaced after the PTO shaft is disassembled or the parallel shaft gear motor is removed.

Wide range of applications: Progressing cavity pumps for biogas installations

The CC-series pump can be used in various industries dealing with pumping and metering tasks, for example in the field of Wastewater puriffication, environmental technology, food industry. However, its main area of application is in the biogas segment.

Strong combination: Digital control technology by Vogelsang

You can benefit comprehensively from the digitalization of your pump, because the use of future-oriented technology enables you to work more efficiently. So if you equip your pump with modern, digital control technology, you can sustainably optimize the performance of the machines and the entire system. For this purpose, important parameters are monitored automatically, which can provide information about future malfunctions. In this way, problems are detected at an early stage and appropriate control interventions are initiated promptly.

Common interfaces are integrated in the Vogelsang control technology for this purpose, which enables data exchange in real time with further systems. All important data can be easily displayed in common browsers by means of the web-based user interface. Optionally, the data can also be accessed remotely via mobile devices.

To ensure that our software remains up to date, a large number of experts are involved in the continuous further development and optimization for the benefits of all users. In this way, the technology can develop to its full potential without requiring more time and capacity. Our goal is to keep operating costs as low as possible and availability as high as possible in order to optimize profitability.

We will be happy to advise you on an individual system solution for your progressing cavity pump. Please contact us for more information or refer to our online magazine "ThinkRed".