Re-designed to provide longer and more efficient service in the harshest of environments with the minimum of maintenance, the new generation of Rotork GO actuators has undergone an important upgrade, including streamlined manufacturing and product improvements. As a result GO actuators are now lighter, more compact and incorporate advanced changes to functional specifications.
The GO range uses the pipeline gas as the motive power source. The gas is delivered to oil tanks that convert the gas into hydraulic pressure and this pressurised hydraulic oil is used to drive industry-preferred Rotork scotch-yoke quarter-turn or linear valve actuators. A complete range of sizes is now available to suit virtually any valve size or class.
Using pressurised oil as the driving force provides powerful and smooth actuator control and isolates the cylinder from the pipeline gas. This prevents contaminants from entering the hydraulic cylinder, eliminating corrosion and seal deterioration and extending actuator life.
At the centre of the gas-over-oil system, the multi-function manifold block integrates gas control functions to facilitate a wide range of valve control options. Standard gas control systems are complemented with optional equipment designed by Rotork Fluid Systems for functions including Line Break, Low Pressure Close, High Differential Inhibit and Emergency Shutdown (ESD).
A dedicated pump is utilised in each operating direction to prevent leaking or contamination between the gas-over-oil tanks. The manifold has the facility for a high-flow hand pump, pressure relief and a locking handle for safe commissioning. High pressure and low pressure control logic designs are also available.