The time spent operating manual valves on Statoil’s new Huldra platform in the Norwegian Sea has been significantly reduced since the introduction of Smith Flow Control’s Easi-Drive portable valve actuator. Since a hybrid version (custom-built for the platform) was installed, operating time has been reduced from 45 minutes for some of the larger valves to only 12 minutes (in the worst case scenario). Easi-Drive is designed for use with manual valves located in hard to reach or hazardous areas or where the valve’s operating characteristics (such as high torque or a large number of handwheel turns) make it difficult to operate. The hybrid version is designed for valves sized between 6–22 inches. These valves have unseating torques of 266 – 1503N/m and handwheel revolutions of 112 and 467 respectively. Drive is provided through a one-inch standard square drive, which links directly to a drive socket on the valve operator. A unique “reaction device” holds the torque driver securely in place and prevents any torque “kick-backs” which, on inferior budget systems, can cause serious injury. In addition, operators are no longer at risk from strain injuries, reducing the time they are off sick.
