New generation: SumPro-L
The long-coupled design that fully succeeds the DO-TS-VDS-L
With the SumPro-L, ARBO introduces a completely new generation of long-coupled centrifugal pumps for corrosive, abrasive and crystallising media.
This series follows on from the trusted DO-TS-VDS-L, a pump that has proven its worth for many years in galvanic baths, process chemistry, waste water, neutralisation installations and many other industrial applications.
The SumPro-L builds on the proven basis of ARBO's SumPro technology, but adds a significantly larger insertion length and a series of fundamental technical improvements. The result is a pump that is not only more robust, but also responds more intelligently to the daily practice of modern process installations. In this article, we will take you through the most important innovations and translate them into what they mean for your installation in concrete terms.
Lower start level due to longer insertion length
One of the most visible improvements is the greater insertion length of the SumPro-L. The pump housing is located deeper in the liquid, allowing the pump to start up at a significantly lower liquid level. In practice, this means that a larger proportion of the tank contents can be used effectively. Residual liquid is less likely to remain behind, reducing the need for additional rinsing or manual emptying of baths. This provides a direct process advantage, especially in installations with frequent batch changes or limited tank sizes.
Longer service life thanks to relubricatable bearings
Whereas the old DO-TS-VDS-L worked with lifetime-lubricated bearings, the SumPro-L is equipped with relubricatable bearings. This may seem like a minor detail, but it has a major impact on the service life and reliability of the drive train. The motor, coupling and bearing assembly are better protected against harmful vibrations, maintenance becomes predictable and unexpected bearing failures are prevented. Especially in 24/7 processes, this directly contributes to a lower Total Cost of Ownership (TCO) and higher availability of the installation.
Gas seal barrier against vapours, unique within this segment
One of the most distinctive improvements within this generation is the new gas seal system. This seal forms an effective barrier against corrosive vapours and crystals towards the bearing and motor zone. This is precisely where most vertical pumps have a weak spot. Thanks to this gas seal, the bearing housing remains dry and clean, crystals no longer reach the drive and the motor is protected against aggressive vapours from within. At the same time, the working environment is also improved, as vapour escape via the pump is prevented. In applications involving, for example, HCl and LiCl baths, FeCl₃ processes or alkaline degreasers, this difference is clearly noticeable in practice.
Fewer welds, higher dimensional stability
In terms of construction, the SumPro-L uses the same platform as the short-coupled SumPro series. This minimises welded joints in the liquid section. Fewer welds mean less stress on the material, tighter tolerances and therefore greater dimensional stability of the entire construction. Especially at higher temperatures, this translates directly into a longer service life. In addition, the rear housing is no longer welded but bolted, making parts modularly replaceable. This reduces maintenance costs and shortens service time.
More material options, wider range of applications The SumPro-L also offers more flexibility than its predecessor in terms of materials.
- PP for approximately 80% of applications,
- PVDF for higher temperatures and strong acids,
- HMPE1000 for abrasive, wear-sensitive liquids,
- and optional parts in PTFE.
This makes the SumPro-L a fully-fledged alternative to metal pumps in many corrosive process environments.
Improved hydraulics: higher flow, lower energy requirements
The hydraulics of the SumPro-L have been optimised with improved flow profiles and a semi-open impeller. This results in higher flow rates of up to approximately 45 m³/h, higher delivery heads of up to 56 metres, and at the same time lower motor power requirements for the same process load. For applications where energy consumption, heat generation and efficiency play a role – such as circulation baths, filtration installations and condensate transfer – this is a measurable improvement.
What does this mean for you as a customer?
In daily practice, the SumPro-L primarily translates into higher operational reliability. The combination of improved bearing construction, gas sealing and the reduction of weld seams results in less unplanned downtime, particularly in aggressive vapour zones where malfunctions traditionally occur most frequently. In addition, the longer service life of bearings, better vapour sealing and modular construction result in a lower Total Cost of Ownership over the entire life cycle of the pump. Tank usage also becomes more efficient. Because the pump can start at a lower liquid level and leaves less residual liquid behind, chemicals are better utilised and manual handling of process baths is reduced. Thanks to the wide choice of materials, the SumPro-L can also be used in a wider range of challenging media than the old series. This offers more design freedom for OEM builders and project engineers. Maintenance is faster, safer and cheaper thanks to the bolted, modular construction. Finally, the closed vapour concept contributes to improved safety and a cleaner working environment, as corrosive vapours can no longer escape through the bearing housing.
Conclusion
The SumPro-L is not a cosmetic upgrade of the DO-TS-VDS-L, but a completely new generation of long-coupled pumps with clear technical advantages in terms of service life, process reliability and energy efficiency. Where the DO-TS-VDS-L was a robust workhorse solution, the SumPro-L takes this concept to a higher professional level with an improved sealing concept, wider choice of materials, more powerful hydraulics and a demonstrably lower TCO.
See also our entire product group of Seal-less immersible centrifugal pumps without shaft seals.