Electro-hydraulic valve actuator SI4

linearsingle-phasethree-phase

Product overview
The SI4 linear actuator is an electro-hydraulic, self-contained actuator providing customizable solutions for valve and industrial motion applications up to 400 kN (90,000 lbf). The SI range combines electrical operation with hydraulic control and mechanical spring-return fail-safe action to deliver precise positioning, configurable safety and high environmental protection.

Features

• Linear thrust up to 400 kN (90,000 lbf)
• Electrical power options: single-phase, three-phase or 24 VDC
• Fail-safe modes: close, open or lock-in-last position via mechanical spring-return
• Spring-return configuration for certified safe shutdown
• Adjustable operating speeds with stepping facility; optional internal flow control valves
• Optional accumulators for multiple backup strokes on power loss and improved hydraulic stroke speed
• Configurable Partial Stroke Testing (PST)
• Single or dual ESD/PSD inputs with multiple solenoid configuration options
• Positioning control option: 4-20 mA input/output, resolution <0.25%
• Network and protocol support: Pakscan™, Profibus®, Modbus®, HART® and Foundation Fieldbus®
• Data logger capable of recording up to 3,000 events
• Configurable status and alarm outputs
• Ingress protection: control module watertight to IP66/68; complete assembly IP66/67
• Explosionproof: Exdb IIB & IIC T4 – certified to ATEX, IEC and CSA
• Functional safety: certified to IEC 61508-2:2010 for SIS (Systematic Capability SC-3) and TÜV SIL (suitable for SIL 2 and SIL 3)

Technical specifications

• Maximum linear thrust: up to 400 kN (90,000 lbf)
• Power supply: single-phase, three-phase or 24 VDC options
• Fail-safe modes: close, open or lock-in-last via mechanical spring-return
• Speed control: adjustable speeds with stepping facility; optional internal flow control valves
• Backup: optional accumulators for multiple backup strokes on loss of power
• Testing: configurable Partial Stroke Testing (PST)
• Safety inputs: single or dual ESD/PSD with solenoid configurations
• Positioning: 4-20 mA input/output option with resolution <0.25%
• Communications: Pakscan™, Profibus®, Modbus®, HART®, Foundation Fieldbus®
• Data logging: records up to 3,000 events
• Outputs: configurable status and alarm outputs
• Ingress protection: control module IP66/68; complete assembly IP66/67
• Certifications: Exdb IIB & IIC T4 (ATEX/IEC/CSA); IEC 61508-2:2010 SIS SC-3; TÜV SIL certified (suitable for SIL 2 and SIL 3)