Electro-hydraulic valve

The Rotork Skilmatic self-contained electro-hydraulic valve actuator range combines the simplicity of electrical operation with the precision of hydraulic actuation and the reliability of mechanical failsafe motion for safety related applications including emergency shutdown (ESD) duty. The advanced control and monitoring system is based on the IQPro intelligent electric actuator technology. The resultant Skilmatic SI/EH Pro range combines existing Skilmatic features with new text displays, performance monitoring and data logging that includes valve signature profiles. The compact and robust actuators deliver a highly reliable means of valve management and positioning a valve to a safe condition. Safe valve positioning is selectable for failsafe to open, failsafe to close or lock in position on power failure or ESD signal. Data from the actuator can be transferred to a PC for storage and analysis by means of Rotork’s free Insight II software. Offering flexibility of customisation to suit the application, the actuators can be integrated into the majority of digital bus control systems, including Pakscan, Foundation Fieldbus, DeviceNet, Profibus and Modbus.
Designed to SIL3 standards for use on safety critical applications, the actuators are also capable of partial stroke testing, enabling isolating valves to be function tested without affecting the process, something of particular importance on emergency shutdown applications. Further enhancements include preventative maintenance features including local and remote fault detection. These features are recognised as providing increased security for safety related duties such as ROSoV (Remotely Operated Shutoff Valves), an area where the Skilmatic EH actuator is widely specified. All actuators are available with hazardous area certification encompassing ATEX, INMETRO, IEC, FM, CSA and GOST. The double-sealed electric enclosure is watertight and dustproof in ratings up to IP68. The Skilmatic SI/EH Pro range delivers rotary output torques from 65 to 600,000Nm and linear thrusts from 1.7 to 5,500kN, providing suitability for valves of virtually any size and design.