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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 engine 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 assembly
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 reconstruction of concrete troughs, with or without steel linings, represents a significant expense for operators. The Robalon® trough lining 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
Since the wastewater treatment plant was built in 1993, steel screws 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.
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.
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.
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®.
Customer Story
Customer: Olbernhau Wastewater Association
In Olbernhau, the existing lifting screws in the feed section had become worn after many years of operation and were to be replaced as part of a modernization project. At the same time, the trough required refurbishment. The system consisted of two screws with a diameter of 500 mm and a flighted length of 7,000 mm.
The planned Robalon® trough lining reduced the available diameter for the screws. Nevertheless, the required conveying capacity of 25 l/s still had to be reliably achieved.
Precisely manufactured RobaScrew lifting screws were used, which were optimally matched to the new trough lining. The custom-designed construction enabled quick and smooth installation within a tight timeframe.
Since commissioning, the system has impressed with its quiet, smooth, and efficient operation. The combination of RobaScrew lift screws and trough lining ensures reliable conveying and a robust, long-term solution.
KLAUS PFLEGER
Mühltal 수처리협회 고위 경영진
“ROBALON 나선잭을 사용하여 유지보수 및 서비스 비용을 상당히 절감했습니다. 윤활 펌프를 관리할 필요가 없기에, 윤활유 비용이 들지 않습니다. 이전에 방부 조치를 손상시켰던 나선잭의 경미한 손상은 이제 무시할 수 있게 되습니다."
DI THOMAS KÖGLER
Eisenstadt 폐수 협회
“전체 나선잭 리노베이션의 성능에 매우 만족합니다. 약속한 성능이 구현되었습니다. 두 개의 ROBALON 반환 나선잭은 설치하자마자 매우 잘 작동하고 있습니다. 내구성은 앞으로 확인하게 될 것입니다."
FRANZ BRANDSTÄTTER
선임 관리, Meisl GmbH
“Röchling Leripa사와 협업하는 것은 당사에 매우 유익했으며 ROBALON 나선잭을 사용하여 새로운 활동 영역을 열게 되었습니다."
GUNTER MOSTLER
Eitler & Partner Ziviltechniker GmbH의 엔지니어 플래너
"에너지 측면의 이점 이외에도, 가벼운 무게, 비용 효율적인 리노베이션, 조립 요건과 유지보수가 거의 필요 없는 베어링이 ROBALON 나선잭을 선택하게 된 이유입니다."
Need more information?
Matthias Baumgartner
Sales Manager
