Auma Sar

The AUMA SAR series represents a robust, modular suite of multi-turn electric actuators, purpose-built for modulating (Class C) service - ideal for applications where valve position must be controlled continuously rather than just opened or closed. With torque outputs from 15 Nm up to 4000 Nm, and flexible control-unit options, SAR actuators serve industries including water, power generation, oil & gas, and general process engineering.
Whether you need precise flow regulation, stable control under varying conditions, or integration into modern automation systems, SAR delivers performance, flexibility, and reliability.

Wide Torque & Modulating Range
Torque range spans 15 Nm to 4000 Nm, covering small to very large valve applications.
Designed for modulating duty (S4-25%) by default. For more demanding uses, special versions are available for S4-50% and S5-25% duty cycles.
Flexible Control Interface & Options
AUMA SAR actuators can be paired with various control units:
Basic ON/OFF or open–close control
Microcontroller-based modulating controls with data logging, diagnostic feedback, and fieldbus interface (e.g. PROFIBUS, Modbus, FOUNDATION-Fieldbus)
Supports accessories like intermediate position switches, position transmitters, torque and limit sensors, mechanical indicators for customized actuator feedback and integration.
Rugged Construction & Field-Proven Durability
Enclosure meets high-sealing protection requirements (e.g. IP68, corrosion-resistant coatings), enabling reliable service in harsh and outdoor environments.
Wide ambient temperature range (commonly –30 °C to +70 °C) ensures stability across varying climates.
Option for manual override via handwheel - useful for maintenance or emergency operations.

Continuous flow regulation: chemical dosing, water treatment, steam control, gas regulation

Applications needing accurate throttling, partial opening/closing, and fine control of flow rate or pressure

Industrial environments requiring robust actuators with high corrosion resistance and sealing

Systems needing integration into automation platforms (DCS/PLC) with remote control, feedback, or data logging

The AUMA SAR series offers a powerful, flexible, and robust solution for valve automation when modulating duty, precise control, and integration flexibility are required. With its broad torque range, modular control options, environmental robustness, and compatibility with modern automation systems, SAR is a top-tier actuator for demanding industrial applications.

Our experienced engineering team provides full support for installation, operation, and maintenance of control valve positioners. We offer calibration, configuration, and repair services using professional equipment to ensure optimal performance. For technical guidance or service requests, contact our team for fast and reliable assistance.

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