AUMA SA 10.2 Multi-Turn Electric Actuator

Overview

AUMA SA 10.2 is a multi-turn electric actuator from AUMA’s NORM range, purpose-built for open-close and inching duty on gate, globe, and other rising-stem valves across the industrial process, water, and power sectors. As one frame size within the SA 07.2–SA 16.2 family, the SA 10.2 delivers an output torque range of roughly 40 to 120 Nm with twelve selectable output speeds, giving specifying engineers a single reliable actuator platform that scales from small isolation valves to medium-duty gate valves without changing manufacturer or control philosophy.

In Oman and the GCC, Seven Star LLC proudly supplies the AUMA SA 10.2 multi-turn actuator to industrial, water treatment, oil and gas, and power generation customers across Oman and the wider GCC. Every actuator supplied through Seven Star LLC is AUMA product with manufacturer documentation, correct wiring documentation, and access to local technical support – helping facility engineers and procurement teams in Muscat, Sohar, and Salalah specify the right AUMA SA 10.2.

Operating Principle

The AUMA SA 10.2 converts rotary output from an integral 3-phase AC asynchronous motor into precisely controlled multi-turn output at the valve stem, driving the valve open or closed through a reduction gear train sized for the actuator’s rated torque range. Because it is a multi-turn design rather than a part-turn actuator, the SA 10.2 is matched to rising-stem valves – gate and globe valves in particular – where the valve closure element travels linearly along a threaded stem as the actuator output shaft rotates, rather than pivoting through a quarter turn as with a ball or butterfly valve.

Internal limit switches stop the motor at the fully open and fully closed positions, while torque switches protect the valve seat and actuator gear train by cutting motor power if resistance exceeds the configured torque setpoint – critical protection on a gate valve where over-torquing at the seated position can damage the wedge or seat rather than simply stalling harmlessly. At output speeds up to roughly 180 rpm at 50 Hz on the fastest selectable ratio, the SA 10.2 is self-locking up to that same threshold, meaning the worm gear train holds the valve securely in position without back-driving from line pressure even with power removed, and a declutchable handwheel provides manual override for commissioning, maintenance, or a power outage.

Engineering Design of the AUMA SA 10.2

The actuator housing is rated IP68, giving reliable protection against dust ingress and temporary submersion, a specification that matters directly in Gulf coastal and offshore installations where humidity, salt-laden air, and periodic washdown are routine rather than exceptional operating conditions. Valve attachment follows the EN ISO 5210 standard with an F10 flange, a rising or non-rising stem bore, and a 200 mm diameter declutchable handwheel for local manual operation, so the SA 10.2 bolts directly onto standard multi-turn valve stem interfaces without custom adapter machining.

The complete unit weighs approximately 22–25 kg depending on the selected speed configuration, keeping it manageable for field installation and replacement without specialized lifting equipment on most valve sizes it serves. Integral limit and torque switching, combined with the standard AUMA terminal compartment, allows straightforward wiring into a motor control center or a local control station, and the same mechanical platform accepts AUMA’s modular control unit options for basic open-close duty through to full Profibus/Modbus fieldbus integration where the project calls for remote monitoring and control.

Key Features

The AUMA SA 10.2 pairs a compact, field-proven mechanical platform with the protection and control options that keep valve automation projects on schedule.

• Output torque range of approximately 40 to 120 Nm covers small-to-medium gate, globe, and rising-stem valves in a single actuator frame size.
• Twelve selectable output speed ratios, from 4 rpm up to 180 rpm at 50 Hz, allow the same actuator body to be matched precisely to valve stroking time requirements.
• IP68 ingress protection rating supports outdoor, coastal, and periodically submerged installation without additional enclosures.
• Integral limit and torque switching protects the valve seat and actuator gear train against over-travel and over-torque conditions.
• Self-locking operation up to the actuator’s rated speed threshold holds valve position securely without back-driving when power is removed.
• A 200 mm declutchable handwheel provides reliable manual override for commissioning, maintenance, and power-outage operation.
• EN ISO 5210 F10 valve attachment interface allows direct mounting to standard multi-turn valve stems without custom adapters.
• Compatible with AUMA’s modular control unit range, from basic local control stations to fieldbus-integrated remote automation.

Industrial Applications

Water and wastewater treatment plants, district cooling networks, and process utility systems across the Gulf specify actuators like the AUMA SA 10.2 on isolation gate valves, bypass lines, and chemical dosing valves where reliable open-close duty with dependable torque protection matters more than continuous modulating control. Oil and gas gathering stations and refinery utility systems also use the SA 10.2 frame size on smaller manual-turned valves being automated for remote operation, where its self-locking gear train and IP68 rating suit both indoor process areas and outdoor tank farms.

In Oman and the GCC, Seven Star LLC supplies the AUMA SA 10.2 actuator to EPC contractors, municipal utilities, and industrial end users throughout Oman and the wider GCC, including projects across the Sohar and Salalah economic zones where technical support with selection supports valve automation projects. Hospitality developments, hospital complexes, and commercial HVAC plants in Muscat also specify the SA 10.2 on building-services isolation valves where a compact, reliable multi-turn actuator with local manual override is preferred over larger frame sizes.

Technical Specifications

The table below summarizes the core specifications of the AUMA SA 10.2 multi-turn actuator as published in AUMA’s technical documentation.

Request a Quote for AUMA SA 10.2

Seven Star LLC invites facility engineers, procurement teams, and EPC contractors across Oman and the GCC to submit a formal RFQ for the AUMA SA 10.2 multi-turn electric actuator. Lead time and availability are confirmed at quotation for new-build valve automation and retrofit projects alike, and the full AUMA SA 10.2 technical datasheet is available on request for engineering review and specification packages. Our instrumentation division can also advise on torque sizing, control unit selection, and fieldbus integration options. In Oman and the GCC, Seven Star LLC supports every actuator supplied with dedicated regional technical support.

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