Electro-hydraulic valve actuator SI4

part-turnsingle-phasethree-phase

Product overview
SI4 part-turn actuators offer the flexibility to be customised to suit applications up to 200,000 Nm (147,500 lbf.ft). The Skilmatic SI range are self-contained electro-hydraulic actuators combining the simplicity of electrical operation with the precision of hydraulic control and the reliability of mechanical spring-return fail-safe action.

Features

• SI4 part-turn torque output up to 200,000 Nm (147,500 lbf.ft)
• Electrical powered, 1-phase, 3-phase or 24 VDC
• Fail-safe to close, open or lock-in-last position
• Spring-return configuration
• Adjustable operating speeds with stepping facility and optional internal flow control valves
• Optional accumulators provide multiple back-up strokes on loss of power supply and increase hydraulic stroke speed on spring-return actuators
• 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 include 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 CSA
• Certified to IEC 61508-2:2010 for SIS with a Systematic Capability SC-3
• TÜV Functional Safety SIL certified to IEC 61508-2:2010
• Suitable for use in SIL 2 and SIL 3 systems

Technical specifications

• Maximum torque: up to 200,000 Nm (147,500 lbf.ft)
• Power options: single-phase, three-phase or 24 VDC
• Fail-safe modes: spring-return to close, open or lock-in-last position
• Control: hydraulic precision with electrical operation; optional 4-20 mA positioning control (<0.25% resolution)
• Speed: adjustable operating speeds with stepping facility and optional internal flow control
• Back-up: optional accumulators for multiple backup strokes on power loss
• Partial Stroke Testing (PST): configurable
• Safety inputs: single or dual ESD/PSD with solenoid options
• Networks: Pakscan™, Profibus®, Modbus®, HART®, Foundation Fieldbus®
• Data logging: stores up to 3,000 events
• Environmental protection: control module IP66/68; complete assembly IP66/67
• Hazardous area approvals: Exdb IIB & IIC T4 (ATEX/IEC/CSA) and other regional certificates
• Functional safety: certified to IEC 61508-2:2010 (Systematic Capability SC-3); TÜV SIL certification; suitable for SIL 2 and SIL 3 applications