Lewis®, a historic brand integrated within Weir, is one of the most recognised names in the world for equipment in high-corrosion and high-temperature service. Its specialisation in sulphuric acid, sulphur chemistry and other severe processes has enabled it to develop a highly technical offering, supported by proprietary metallurgy, process knowledge and a clear orientation towards safety and durability.
Lewis axial flow pumps are designed to move large volumes at low differential head in chemical processes where corrosion and operational continuity are critical factors. This concept plays a key role in phosphoric acid, evaporation, crystallisation, recirculation and other circuits where flow dominates over pressure. The selection of hydraulics, materials, sealing and pump configuration is key to adapting the equipment to the fluid, temperature, pressure and service demands. Proper adaptation of the pump to the operating point, fluid and sealing conditions of the service is particularly relevant for sustaining performance and service life.
The differential value of Lewis lies in bringing axial flow hydraulics to highly aggressive environments, backed by advanced materials and a design philosophy oriented towards safety, stability and long service life. In terms of product, it is a well-positioned solution when hydraulic efficiency and chemical resistance must coexist without compromise.
Its natural market is in phosphoric acid plants, brines and abrasive applications where Lewis’s developed metallurgies can provide added value to the customer.
Lewis’s extreme specialisation is particularly valuable when the customer needs a specific technical response rather than a generic product adaptation.