AUMA SA Series Industrial Multi-Turn Electric Actuator with IP68 for Control Valves

Product Overview

The AUMA SA Series valve assembly is delivered as a factory-matched package. A multi-turn electric actuator is mounted on a gate or globe valve and tested as a complete unit before shipment. This saves time during on-site installation and removes any risk of component mismatch. The actuator produces torque from 10 Nm to 32,000 Nm through a 3-phase AC, 1-phase AC, or DC motor. Limit and torque switches provide precise end-position feedback, and a handwheel allows manual operation when power is unavailable.

SA-type actuators for open-close duty are rated Class A and B or short-time duty S2 – 15 min. An optional S2 – 30 min version handles longer running periods. The actuator can be paired with various controls, from basic OPEN-CLOSE units to micro-controlled versions with operating data logging or fieldbus interface. The IP68 enclosure per EN 60529 provides high-quality corrosion protection (KS) and operates within -30°C to +70°C. Output drive types conform to DIN and ISO standards.

Technical Specifications

Application Industry

The system serves water and wastewater treatment, power generation, oil and gas, petrochemical, chemical processing, district heating, and industrial plants. It handles open-close duty on gate valves, globe valves, and other multi-turn valve applications. The IP68 enclosure makes it suitable for harsh outdoor or submerged conditions.

Common Problems

• No reaction to operation commands: Check the reaction time setting first. Then look for mechanical blockage or power supply problems.

• Torque fault in OPEN or CLOSE direction: Inspect the valve for obstruction and verify torque switch settings. Excessive valve friction can also cause this fault.

• Mechanical position indicator cannot be set: The reduction gearing may not match the actuator's turns/stroke. Fit a suitable reduction gearing.

• Actuator runs to end stop although limit switches work properly: Review limit switch settings and end position configuration.

• Motor winding temperature too high: Check whether the actuator sizing matches the application. Confirm the duty cycle is correct.

Replacement Models

The AUMA SA Series is a current-generation multi-turn electric actuator platform. The SAR Series is a modulating actuator variant rated for Class C or duty type S4 – 25%. The SAEx Series is available for explosion-proof applications (torque range 10 Nm to 16,000 Nm). The SA-UW Series is designed for continuous underwater use (torque range 10 Nm to 4,000 Nm). For cross-vendor alternatives, verify valve mounting, torque requirements, and control interface compatibility before ordering.