Rotork Skilmatic SI valve actuators

Rotork has introduced a compact quarter-turn design to its Skilmatic SI range of self-contained electro-hydraulic actuators. The latest actuator uses a rack-and-pinion drive for a torque output of up to 1000 Nm.

The SI range of actuators are said to combine the simplicity of electrical operation with the precision of hydraulic control and the reliability of mechanical spring-return fail-safe action. Typical applications for Skilmatic SI actuators include functional safety-related emergency shutdown (ESD) and remotely operated shutoff valve (ROSoV) duties.

With a wide choice of operating speeds, ESD options include single or dual inputs and partial stroke testing (PST) to meet a wide range of applications. All actuators are available with hazardous area certification and are suitable for use in SIL 2/3 systems.

The actuator data logger is capable of storing up to 3000 events. Users can export data logs to Insight 2 or Rotork’s cloud-based Intelligent Asset Management (iAM) system.

Offering the flexibility of customisation to suit the application, SI range actuators can be integrated into the majority of digital bus control systems, including Rotork’s Pakscan network, Foundation Fieldbus, DeviceNet, Profibus, Modbus and HART.

The SI range delivers quarter-turn torque output up to 200,000 Nm and linear thrust output up to 400 kN that are suitable for valves of virtually any size and design.