Improved progressing cavity pumps from NETZSCH
Company says new xLC stator adjustment system triples service life of its NEMO pumps
NETZSCH Pumpen & Systeme GmbH have added another component to their range of NEMO progressing cavity pumps. The new xLC stator adjustment unit is said to triple the service life of the pumps, particularly when conveying difficult, abrasive media.
When wear occurs in the rotor-stator system, the xLC unit allows the performance of the pump to be re-established by adjusting the preload between the conveyor elements.
It is important for the xLC adjustment system that the elastomer in the rigid metal sleeve of the stator is flexible, which has been made possible with the development of the proven iFD stator 2.0 component.
The xLC unit uses this characteristic so that the elastomer is not vulcanized into the housing, but rather fixed through axial pressing. To regulate the preload in the rotor-stator system, the elastomer in the sheath is extended (by pulling) or shortened (by pressing), which changes the preload between the pumping elements.
In case of wear, compressing the elastomer increases the preload and re-establishes the reduced sealing line. If the stator has to be adjusted due to declining pump performance, the setting nuts of the system are adjusted, compressing the elastomer insert in the metal housing once again.
A scale with seven defined stop points facilitates gradual adjustment of the stator with only two setting screws while also showing the remaining potential until a stator change is required.
