AUMA SA Series Multi-Turn Electric Actuator with Control for Valve Automation

Product Overview

The AUMA SA Series Multi-Turn Electric Actuator Package is a complete valve automation system that combines the SA multi-turn actuator with integral actuator controls (AM or AC series) in a single pre-assembled, factory-tested unit. It is supplied as a coordinated package to shorten commissioning time and eliminate the need to separately match actuator, control unit, feedback components, and electrical interfaces. The package centers on a rugged worm gear drive with torque output from 10 Nm to 32,000 Nm and output speeds from 4 rpm to 180 rpm, driven by 3-phase AC, 1-phase AC, or DC motors depending on configuration. Limit and torque sensing are integrated, and local operation is possible through a handwheel for manual override. The actuator can be combined with controls ranging from simple OPEN-CLOSE units to micro-controlled versions with fieldbus interface and operating data logging.

The housing is rated IP67 as standard with IP68 available as an option, providing protection against dust, water ingress, and temporary immersion. The operating ambient temperature range is -30°C to +70°C, making the package suitable for outdoor, washdown, and demanding industrial environments. Corrosion protection meets KS class requirements for high-resistance applications. Available control options include AM series for basic open-close applications and AC series for advanced diagnostics, fieldbus communication (Profibus, Modbus, Foundation Fieldbus), and asset management integration. Certifications may include ATEX, IECEx, FM, and CSA for hazardous area use, with SIL 2 and SIL 3 capability available for selected configurations. The SA Series is widely deployed in water treatment, power generation, oil and gas, chemical processing, and marine applications where reliable valve automation and long service life are essential.

Technical Specifications

Application Industry

1. Water and wastewater treatment

2. Power generation (thermal, hydro, nuclear)

3. Oil and gas production and transmission

4. Chemical and petrochemical processing

5. Pulp and paper

6. Mining and minerals

7. Marine and shipbuilding

8. Food and beverage processing

These industries require reliable valve automation for open-close and positioning duties on gate valves, globe valves, butterfly valves, and sluice gates. The SA Series handles high-cycle operation, remote installations, and hazardous area environments when correctly configured with appropriate controls and certifications. Proper mounting, air quality (for pneumatic accessories if used), and electrical protection are important for long-term reliability.

Common Problems

1. Actuator does not respond to command — check control unit power, selector switch position (LOCAL/REMOTE), and fieldbus communication status.

2. Torque fault indication during operation — verify valve seating, stem alignment, and torque limit settings; reset via RESET button or fieldbus command.

3. Thermal fault trip — motor protection has activated; allow cooling period, check duty cycle and ambient temperature, verify motor sizing.

4. Limit switch not tripping — inspect limit sensing mechanism, verify travel settings, and check for mechanical obstruction.

5. Handwheel does not engage — verify manual override mechanism, check for declutch lever position, and inspect internal gearing.

6. Position feedback incorrect — recalibrate position transmitter, check 4–20 mA loop wiring, and verify encoder function.

7. Display shows configuration error — review parameter settings, check control unit configuration against valve data, and reset.

8. Fieldbus communication failure — verify bus wiring, termination, device address, and protocol configuration.

9. Enclosure ingress or moisture — inspect seals, cable glands, and plug/socket connector; replace O-rings as needed.

10. Valve drift or hunting during modulating duty — check control tuning, verify actuator is SAR series for modulating duty, and inspect valve torque requirements.

Replacement Models

AUMA SAR Series (modulating duty), AUMA SQ Series (part-turn), AUMA SAEx Series (explosion-proof), AUMA SA-UW Series (underwater), Rotork IQ3 Series, Rotork IQT Series, SIPOS 7 Series, Limitorque MX Series, EIM TEC Series, Bernard S series, Auma SA 07.2, SA 07.6, SA 10.2, SA 14.2, SA 14.6, SA 16.2, SA 25.1, SA 30.1, SA 35.1, SA 40.1, SA 48.1.
Selection note: confirm torque requirement, output speed, valve attachment standard (ISO 5210/DIN 3210), control unit type, communication protocol, and hazardous area certification before replacement.