Chinese Ball Valve Butterfly Valve and Auma SQ Series Part-turn Actuators with AM Actuators Control Unit

The AUMA SQ/SQR 05.2 – 14.2 part-turn actuators with AUMA MATIC AM 01.1 / AMExC 01.1 controls in SFC version are purpose-built for safety instrumented systems (SIS) per IEC 61508 / IEC 61511. These quarter-turn actuators provide certified “Safe end position feedback" using mechanical limit switches, achieving SIL 2/3 capability in low-demand mode. The compact design integrates actuator, worm gear, and controls into a single weatherproof unit, ensuring reliable 90° valve positioning with comprehensive diagnostics for proof testing and PVST.

• Certified Functional Safety: Safe end position signaling via direct-wired mechanical switches; exida-validated PFDavg and SFF values.
• Proof Test Ready: Dedicated checklist for verifying safe end position signal, collective fault output, and dynamic response.
• Partial Valve Stroke Test (PVST): Programmable diagnostics for frequent, non-disruptive verification of actuator and valve health.
• Self-Locking Mechanism: Prevents unintended valve movement from standstill; suitable for all standard output speeds.
• Robust Safety Architecture: HFT = 0, type A device classification, wide ambient range with optional double sealing.
• Local & Remote Diagnostics: Mechanical position indicator, collective fault contact, and reaction monitoring support.

Designed for safety-critical quarter-turn valves in emergency shutdown (ESD), fire & gas, and high-integrity pressure protection systems (HIPPS) in refineries, chemical plants, and power stations. The SFC version ensures compliance with functional safety standards while maintaining standard open-close operation.

• What is the “Safe end position feedback" function? Direct-wired limit switches signal when the actuator reaches the commanded end position; only this path is safety-related.
• How often should PVST be performed? At least 10* more frequently than the full proof test to maintain diagnostic coverage.
• Can I extend the proof test interval? Yes, with appropriate scaling rules and regular lubrication checks (max. 10 years).
• Is manual operation allowed in safety mode? Yes, but motor operation has priority; document any manual intervention.
• What if a fault is detected during maintenance? Immediately report to AUMA; re-validate the safety function after repair.

Phone/WeChat/WhatsApp: +8613916209596

Email: svetama@gbsxj.com

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