Rotork valve actuators have been used in underground gas storage facilities in the Baltic country of Latvia. The unique geological conditions in the country are suitable for the underground storage of natural gas, for both the country’s domestic use and for gas en-route from Russia to other Baltic countries. These facilities are being developed to secure the supply of natural gas to Baltic countries by the upgrading of existing facilities. Capacity of the storage site at Incukalns is 4.4BCM (billion cubic metres) after reconstruction. This project has involved the installation of 330 IQ and IQT ATEX certified explosion-proof intelligent electric valve actuators, in contracts awarded to Rotork’s Latvian agency Rino TK. The majority of the actuators operate ball valves controlling the receiving of the gas and its injection into the storage wells. Additional IQM modulating actuators are installed on ball valves in the site’s metering plant. All actuators are connected to PLCs and controlled by a centralised SCADA system designed and manufactured by Olimps. The larger, gas receiving ball valves, in sizes up to 1000mm, are operated by IQ actuators in combination with IW quarter-turn gearboxes manufactured by Rotork Gears. Smaller ball valves are operated by IQT direct drive quarter-turn actuators.