PuK - Process Technology & Components 2024
A technical trade magazine with a history of more than 60 years.
A technical trade magazine with a history of more than 60 years.
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Pumps and Systems<br />
Progressing cavity pumps<br />
Service life extended, lighter workload on staff<br />
Conical progressive cavity pump for<br />
demanding applications in the industrial<br />
and wastewater sectors<br />
Markus Liebich<br />
Whether it’s high pressures or abrasive<br />
substances in the fluid: especially<br />
in the wastewater and industrial<br />
sectors, applications place high<br />
demands on pump technology. Progressive<br />
cavity pumps are designed<br />
to pump demanding media and<br />
have proven themselves as a pump<br />
technology in these industries.<br />
An example from the wastewater<br />
sector: digester feeding<br />
Progressive cavity pumps are often<br />
used to feed sludge digesters: the<br />
pumps push the thickened primary<br />
or raw sludge over long pumping<br />
distances into the digester towers,<br />
some of which are twenty meters<br />
high. A combination of abrasive media<br />
and high pressures of up to six<br />
bar put a lot of strain on the pumps.<br />
Often, the rotor and stator have to<br />
be replaced once or twice a year.<br />
This not only means that the pump<br />
is out of operation, but also requires<br />
a lot of time and resources: replacing<br />
spare parts is cost-intensive and requires<br />
at least two workers.<br />
Industrial users need flexible, lowmaintenance<br />
pumping solutions<br />
In industrial companies, too, pump<br />
technology conveys demanding media<br />
such as ceramic slurry. This watermineral<br />
mixture is required for the<br />
manufacture of ceramic products.<br />
The pulpy or semifluid consistency<br />
of ceramic slurry puts a lot of strain<br />
on the pumping elements during<br />
pumping. Slurried clay is also highly<br />
viscous, requiring powerful, robust<br />
industrial pumps that meet the requirements<br />
of the ceramics industry.<br />
For companies in the industrial<br />
and wastewater sectors, it is impor-<br />
Fig. 1: Energy-efficient and durable: The HiCone progressive cavity pump.<br />
(Source of all images: Vogelsang GmbH & Co. KG)<br />
Fig. 2: The conical geometry of the rotor and stator enables precise readjustment in the<br />
event of wear and replaces the need to replace parts.<br />
times longer than that of a conventant<br />
to have pump technology that is<br />
suitable for demanding applications<br />
and can be flexibly adapted to operating<br />
parameters. This reduces the<br />
costs and time required for maintenance<br />
work.<br />
HiCone with conical rotor-stator<br />
geometry: adjustment instead of<br />
part replacement<br />
The HiCone progressive cavity pump<br />
from Vogelsang GmbH & Co. KG is<br />
designed to meet these requirements.<br />
The rotor and stator of the<br />
pump are conical in shape. If a gap<br />
occurs between the two parts as a result<br />
of wear, this can be compensated<br />
during operation: the rotor is adjusted<br />
axially. The pump then regains the<br />
same characteristics as when it was<br />
new. There is no need for time-consuming<br />
and costly part changes.<br />
Cut down on repeated<br />
maintenance work<br />
Thanks to the precise adjustment, the<br />
service life of the HiCone is up to four<br />
38 PROCESS TECHNOLOGY & COMPONENTS <strong>2024</strong>
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