The user of LEWMET alloy flow control specialties enjoys many benefits which are the direct result of Lewis' long specialisation in the design and manufacture of equipment for the fertiliser acids industry:

Specialised Metallurgy.

• Lewis is unique among specialised pump manufacturers in its ability to develop appropriate materials - the LEWMET alloys - which provide our customers with unequalled performance in the harsh operating environment of the modern sulphuric acid producing plant.

High Tolerance for Process Upsets.

• LEWMET alloys are designed to perform in a wider range - typically 93% H2SO4 through oleum - than are most commercially available alloys. Additionally, process excursions outside of "normal" conditions - in either concentration or temperature - are usually accommodated without adverse effect on the operating life of the LEWMET alloy.

Hardenability and Toughness.

• LEWMET alloys typically have as-cast hardness levels significantly higher than other austenitic alloys that may be used in H2SO4 circulating systems. In addition, some grades of LEWMET alloys are hardenable to 45 Rc. with no loss of its inherent corrosion resistance, making LEWMET alloys the best available solution for most difficult abrasive applications in strong acid environments.

Wide Range of Applications.

• Lewis' LEWMET specialities are also available for other inorganic acid applications, including high-temperature energy recovery systems and phosphoric acid services.