Rotork Skilmatic electro-hydraulic actuators have been specified to provide emergency shutdown duties (ESD) on remotely sited valve installations at a chemical plant in Brazil. Dow Chemical operates the chlorine-soda plant in the state of Bahia, using brine as a raw material to produce chlorine and soda through an electrolytic separation process. The plant is served by several brine wells that are spread apart in remote locations and require failsafe valve operation. Each well comprises three automated valves. One is for water injection to dissolve the rock salt, one is for oil injection to make the well top impermeable and prevent its collapse and the third is to control well production. In the event of an accident or power loss all the valves must failsafe to the closed position, isolating the well whilst maintaining pressurisation. Rotork’s representative in Brazil, Fluxo Servicios de Petroleo, was able to offer the Skilmatic solution, providing electrical operation combined with the precision of hydraulic performance for the ESD failsafe duty. Actuators selected for the application are Skilmatic SI-1 and SI-2 units, which also incorporate Rotork’s IQ control intelligence and non-intrusive commissioning and data communication technologies.