LEWA, a German-based manufacturer of industrial pumps and dosing systems for liquid dosing, has supplied a Sweden-based chemical manufacturer with its combination pump system to upgrade its sulfate granule production facility.
Used in the formulation of chemicals for ultrapure water (UPW) treatment, sulfate granules must be manufactured in an environment where chemical dosing is exact, process stability is constant, and contamination risks are minimised.
The newly installed six-head LEWA ecoflow combination pump meets these requirements with advanced electronic synchronisation and smart monitoring, ensuring the precise and reliable mixing of water and sulfuric acid in a static mixer—a process that can involve aggressive chemical reactions and transient temperature spikes up to 300°C
Used in the formulation of chemicals for ultrapure water (UPW) treatment, sulfate granules must be manufactured in an environment where chemical dosing is exact
To meet modern standards and support continuous production within sensitive environments, LEWA replaced legacy models with a combination system composed of three LDD3 M9 pump heads for process water and three LDE3 M9 heads for sulfuric acid, each engineered with hermetic sealing to avoid leaks and potential airborne contamination.
This design eliminates external seals, reducing the risk of particulates and ensuring cleanroom compatibility even in aggressive chemical applications.
The Smart Monitoring capability, vital for cleanroom-controlled processes, provides real-time performance data and predictive maintenance alerts, significantly minimising the need for intrusive inspections or unplanned system access.
This design eliminates external seals, reducing the risk of particulates and ensuring cleanroom compatibility even in aggressive chemical applications
This means fewer opportunities for particulate contamination and a significant boost in operational uptime.
To ensure smooth, laminar flow—a must in any cleanroom liquid delivery system—the LEWA pump heads are synchronised at precisely calculated phase shifts (0/120/240 degrees for water and 60/180/300 degrees for sulfuric acid), resulting in minimal pulsation.
This reduces mechanical vibrations and protects the integrity of downstream cleanroom components such as static mixers and precision piping.
Also, with flexible stroke length adjustment on the LDD3 process water pump, cleanroom operators can fine-tune acid dilution ratios without manual intervention, preserving environmental isolation and reducing the frequency of maintenance cycles.
Torsten Moller, LEWA's project lead, said: “This upgrade not only ensures future-proof performance in a chemically aggressive environment, but also aligns with cleanroom requirements for sealed systems, minimised pulsation, and non-intrusive monitoring. The result is reliable production with minimal risk of cross-contamination or unplanned downtime.”
By combining chemical resistance, continuous monitoring, and pulsation-free precision, LEWA’s new system underscores its value to cleanroom-centric operations where control, consistency, and cleanliness are paramount, according to the company.
Top image: LEWA combination pump