You are here

Rotork introduces the next generation Skilmatic to complete the SI-3 range of electro-hydraulic actuators

ROTORK introduces the next generation compact, reliable and robust quarter-turn designs to its Skilmatic SI-3 range of self-contained electro-hydraulic actuators. The new “small” SI-3 actuator replaces the SI-1 and 2.1 and uses a rack and pinion drive for a torque outputs of up to 1,000 Nm (737 lbf.ft), a scotch yoke version is used for the larger range up to 500.000Nm.

The SI range of actuators 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) inputs and SIL 2/3 applications.

The actuators are offered with a wide range of operating speeds, ESD inputs, partial stroke testing, analogue and digital bus communication capabilities to comply with all control configurations. Independent limit switches and position feedback are provided. Selectable status and alarm indication with volt free relay outputs are also offered as standard. Watch the product video here.


Key benefits of the Skilmatic SI range:

  • Electrical powered, 1-phase, 3-phase or 24 VDC
  • Fail-safe on powerloss to close, open or lock in last position or on ESD only
  • Quarter-turn torque up to 500,000 Nm (4,425,000 lbf.ft)
  • Linear thrust output up to 5500 kN (1,236,000 lbf)
  • Adjustable operating speeds with stepping facility and optional internal flow control valves
  • Configurable Partial Stroke Testing (PST)
  • Single or dual ESD/PSD input with solenoid configuration options
  • Positioning control option 4-20 mA input and output, resolution <0.25%
  • Network options Pakscan™, Profibus®, Modbus®, HART® and Foundation Fieldbus®
  • Data logger, recording up to 3,000 events
  • Configurable status and alarm outputs
  • Watertight up to IP66/68 (control module), IP66/67 (complete assembly)
  • Explosionproof Exdb IIB & IIC T4 –ATEX, IEC and EAC
  • Certified to IEC 61508-2:2010 for SIS with a Systematic Capability SC-3
  • Suitable for use in SIL 2 and SIL 3 system

See the Skilmatic literature page for further details.

Source: Read their news item here.



Available at PRODIM Industrial Valves & Automation!

This new generation of actuators has been awaited by PRODIM for years! We are also very excited to satisfy a number of customers who have also been asking for this for quite some time.

Interested? Be sure to contact us! We are happy to serve you in Belgium and the Netherlands.


PRODIM Industrial Valves & Automation is your specialist in industrial valves and automation located in Belgium.

Find out more about our ROTORK range here.

Contact us for more info.