Geothermal energy production exploits steam, brine and hot water reservoirs heated by dry rock or magma below the Earth’s surface. Considered a sustainable resource, geothermal power is popular in countries like the United States, the Philippines and Indonesia where plants produce hundreds of megawatts of capacity. Regions within Latin America, South America, Africa and the Middle East are in the planning and development stage for additional generation for the future. As of 2024, the global generating capacity stands at 16.4 GW.

The two most common plant types are flash steam and binary cycle Flash steam uses naturally occurring steam to power a turbine while binary cycle uses the hydrothermal reserve to heat a working medium (such as Isopentane or Isobutane).

Generating geothermal electricity requires high reliability and precise control in challenging environmental conditions. REXA Linear and Rotary Actuators are field proven for geothermal energy production applications such as steam turbine governor and emergency trips, production well/injection well flow control and isolation, pump protection and heat transfer fluid loops. Maximized uptime is the key economic driver for these plants.