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Coclee di sollevamento per impianti di trattamento delle acque reflue
Una rivoluzione nella tecnologia degli impianti di trattamento delle acque reflue
Maggiore efficienza con le coclee di sollevamento Robalon negli impianti di trattamento delle acque reflue
La ruggine è la causa principale dell'usura delle coclee! Con le nostre coclee di sollevamento ROBALON, estremamente resistenti all'usura, si evitano i danni della ruggine che si verificano con le coclee convenzionali in acciaio. L’investimento per una coclea di sollevamento in plastica si è ripagato da solo in un tempo pari alla metà della vita media di una coclea.
The Benefits of RobaScrew at a Glance
Our high-performance plastic Robalon®
Lifting screws from Röchling Industrial Oepping are manufactured from the high-performance plastic Robalon®. For over 60 years, we have been processing and refining this material, which is used in many industries worldwide. Robalon® is a sintered plastic consisting of ultra-high-molecular-weight low-pressure polyethylene (UHMW-PE), alloyed with molybdenum disulfide, cross-linking agents, and UV stabilizers, and produced using a special long-term sintering process. For this reason, RobaScrew lifting screws are characterized by maximum abrasion resistance, reliability at low temperatures, chemical resistance, and a long service life.
Why plastic instead of steel?
Unlike conventional steel screws, minor damage to RobaScrew lifting screws is not a problem, as there is no corrosion protection that could be compromised. The minimal clearance required for RobaScrew lifting screws in the steel trough has a positive effect on efficiency — especially when compared to classic steel lifting screws. Combined with their significantly lower weight, RobaScrew lifting screws achieve a higher hydraulic efficiency than conventional steel screws, depending on the water level.
Read the results of the study conducted by BOKU Vienna here:
Key Technical Specifications
Models
The Röchling Engineering Team develops the best possible solution for the screw pump system based on the specific requirements for flow rate and head at the site.
- Single-, double-, or triple-screw models
- Models for hazardous areas
- Flow rates up to 260 L/s
Our designs
RobaScrew compact
Versatile application
Suitable for both new construction and retrofitting in existing structures as part of renovation projects in a trough-in-trough configuration.
Corrosion-resistant construction
The trough and all steel components are made entirely of stainless steel—for high durability, low maintenance, and optimal performance even in demanding environments.
Variable drive solutions
Available with either direct drive including a torque support or with an external drive motor and maintenance-free drive shaft with a flexible coupling for quiet and reliable operation.
Maintenance-friendly bearings
Central lubrication for upper and lower bearings; bearings easily accessible for simple maintenance.
Reliable installation
RobaScrew compact screw conveyors are installed by the in-house RobaServ service and installation team—for maximum safety, short installation times, and minimal downtime.
Robalon® trough lining
The rehabilitation of concrete troughs, with or without steel linings, represents a significant expense for operators. The Robalon® trough liner provides a quick and cost-effective solution to get the trough back up and running quickly.
Corrosion-resistant functional layer
Low-friction and safe operation thanks to a plastic lining made of abrasion-resistant UHMW-PE.
Covers unevenness
Smooths out minor chips and unevenness in the trough.
Easy maintenance
An integrated visual wear indicator detects application-related wear at an early stage. Replacement can be performed without dismantling the screw, minimizing downtime and maintenance costs.
Customer Story
Customer: Linz-Unkel Wastewater Disposal Association
Initial situation
Since the wastewater treatment plant was built in 1993, steel augers had been in use for the return sludge, and these had been subjected to heavy wear and tear over the decades. Corrosion, material fatigue, and increasing maintenance requirements made it increasingly clear that a sustainable solution was needed.
Challenge
The ongoing operation of the wastewater treatment plant could not be interrupted at any time. Consequently, the time window for replacing the screws was extremely tight. Therefore, a solution was needed that was a perfect fit, quick to install, and permanently reliable.
Solution
After taking precise on-site measurements, the decision was made to install the RobaScrew compact lifting screw in a trough-in-trough configuration. This design allows the old screws to be replaced without having to laboriously dismantle the existing reinforced concrete trough—a decisive advantage for an efficient retrofit. Installation was carried out by the Röchling service team and was completed within 1.5 days.
Result
Along with the new RobaScrew compact screw conveyors, a modern drive system with variable-frequency drive control was installed. The result: energy savings of 48,000 kWh per year, a reduction of 18.3 tons of CO2, significantly lower maintenance requirements, and high corrosion resistance thanks to Robalon®.
KLAUS PFLEGER
Direzione, Reinhalteverband Mühltal
"La coclea di sollevamento ROBALON mi consente di risparmiare costi considerevoli per la manutenzione, ordinaria e straordinaria. Non ho una pompa per il grasso, di conseguenza vengono meno i relativi costi. Piccoli danni alla coclea, che prima distruggevano la protezione contro la corrosione, sono ora insignificanti".
DI THOMAS KÖGLER
Abwasserverband Eisenstadt
"Sono molto soddisfatto della gestione dell'intero risanamento della coclea. Ho ricevuto quanto mi era stato promesso. Le due coclee di ricircolo ROBALON hanno funzionato in modo eccellente sin dal primo minuto. La durata si vedrà nei prossimi anni."
FRANZ BRANDSTÄTTER
Direzione aziendale, Meisl GmbH
"La collaborazione con la ditta Röchling Leripa arricchisce la nostra azienda e ci apre nuovi campi di attività con la coclea di sollevamento ROBALON"
GUNTER MOSTLER
Progettista, Dipl.-Ing. Eitler & Partner Ziviltechniker GmbH
“Oltre agli studi disponibili sui vantaggi energetici, il peso inferiore, le condizioni favorevoli di risanamento e revisione e i cuscinetti che richiedono pochissima manutenzione sono per me aspetti fondamentali per la scelta della coclea di sollevamento ROBALON"
