AUMA

AUMA Riester GmbH & Co. KG, founded in 1964 and headquartered in Muhlheim an der Ruhr, Germany, is Europe's largest electric valve actuator manufacturer and a global leader alongside Rotork. The company built its reputation on the modular SA multi-turn actuator range, paired with GS gear gearboxes, and the SQ part-turn range for quarter-turn valves — designs characterized by robust motors, torque-dependent switching, and the AUMATIC intelligent control unit that adds diagnostics, bus communication and logging. AUMA's actuator-gearbox combination for gate, globe and sluice valves is an industry standard in water infrastructure, power stations and pipelines, and its part-turn units drive ball and butterfly valves across every process industry. The company also manufactures its own gear operators, so manual and electric drive solutions come from one engineering source, with matching flange interfaces and corrosion protection. AUMA maintains factories in Germany, Hungary, China, India, Brazil and the USA, giving it local production and service on most continents, and its CORROSIVE PROTECTION coating system has set benchmarks for actuator durability in coastal and hydrogen-sulfide environments. Documentation, sizing software and spare-part logistics are consistently rated best-in-class.