AUMA SAREx 10.2 Explosion-Proof Modulating Actuator

Overview

AUMA SAREx 10.2 brings 60 to 120 Nm tripping torque (S4-25 %) and up to 60 / 30 Nm modulating torque (S4-25 % / S4-50 %) to the single F10 flange of EN ISO 5210, as third frame of the modulating Ex range.

The SAREx 10.2 is supplied across Oman and the GCC by Seven Star LLC, a trusted AUMA supplier, with quotation, delivery planning and commissioning support. Plants in Duqm and Salalah are served from Muscat. Compare it with the Ex modulating range (SAREx), the SAEx series overview and the AUMA MATIC AM/AC integral actuator controls.

Operating Principle of the AUMA SAREx 10.2

In the SAREx 10.2, modulating torque is 60 Nm (S4-25 %) and 30 Nm (S4-50 %) up to 45 rpm, and 50 / 25 Nm at 63 to 90 rpm. The reduction gear and a mechanical counter system keep position, and an AMExC or ACExC control sends the pulses. Self-locking is documented for the whole series.

Engineering Design of the SAREx 10.2

The SAREx 10.2 has a 50 ms minimum pulse and reversal pulses of up to 260 ms at the slowest speed, so slower speeds are the usual choice for gentle positioning. Its 26 to 28 kg mass and 200 mm handwheel suit medium control valves. Check that valve friction stays below the 60 Nm modulating torque (50 Nm above 45 rpm) over the whole stroke.

The wiring route is an AUMA Ex plug/socket connector (KT) with spring-clamp control terminals; the housing is IP68 and the heater option is 12.5 W.

Key Features of the AUMA SAREx 10.2

What the AUMA SAREx 10.2 offers at a glance:

• Trip torque from 60 to 120 Nm for S4-25 % duty, up to 90 Nm for S4-50 %.
• Continuous positioning torque of 60 / 30 Nm at S4-25 % / S4-50 %.
• Output speeds of 4–90 rpm at 50 Hz, with starts graded by speed band.
• Approximate weight of 26 kg (4–22 rpm), 28 kg (32–90 rpm) and 200 mm handwheel.
• Pulse timing 50 ms (same direction); on reversal 260 ms at 4 rpm down to 60 ms at 90 rpm. Motors of 0.06–0.70 kW at 400 V.

Selecting the AUMA SAREx 10.2 for Your Valve

The SAREx 10.2 provides 60 to 120 Nm tripping torque and a 60 Nm modulating torque at S4-25% for speeds up to 45 rpm. Its F10 flange and 40 mm stem capacity suit medium-size control valves in hazardous areas. The permissible starts per hour are 1,000 up to 45 rpm and 800 from 63 to 90 rpm, which supports closed-loop control with frequent small corrections.

The SAREx 10.2 doubles the SAREx 07.6 trip ceiling from 60 to 120 Nm on an F10 flange with a 200 mm handwheel. Valves above 120 Nm move to the SAREx 14.2 on F14, rated to 250 Nm.

AUMA SAREx 10.2 Modulating Torque and Starts by Speed

These are the modulating limits of the AUMA SAREx 10.2 by output speed, valid at nominal voltage and +40 °C. Tripping torque is adjustable up to 120 Nm (S4-25 %) or 90 Nm (S4-50 %). Illustrative calculation, not AUMA data: a control valve with 10 turns per stroke needs 75 s at 8 rpm, 13 s at 45 rpm and 7 s at 90 rpm for a full stroke.

Loop-tuning note: the SAREx 10.2 allows 1,000 starts per hour up to 45 rpm and 800 from 63 rpm, with a 50 ms minimum pulse and reversal pulses between 260 ms (4 rpm) and 60 ms (90 rpm). Because modulating torque also steps down from 60 Nm to 50 Nm at 63 rpm, speeds up to 45 rpm are the usual choice when valve friction is above 50 Nm.

Worked Sizing Example for the SAREx 10.2 (Illustrative Calculation)

A level control valve in a produced-water separator has a friction torque of 45 Nm. The SAREx 10.2 provides 60 Nm at S4-25 % up to 45 rpm, which suffices, while the 50 Nm limit at 63 to 90 rpm leaves little margin. A speed of 16 to 22 rpm, with 1,000 starts per hour and a reversal pulse of 100 to 90 ms, is typically a good compromise between response and positioning accuracy. This is an illustrative calculation, not AUMA data.

Motor and Electrical Data of the AUMA SAREx 10.2

4 speed points from AUMA’s separate electrical data sheet (S4-25 %, 400 V / 50 Hz), 0.06 to 0.70 kW; approximate values that are not part of the technical datasheet attached here.

Explosion Protection and Installation Notes for the AUMA SAREx 10.2

Standard ATEX markings of the SAREx 10.2 per AUMA: II 2G Ex db eb IIC T4 or T3 Gb, II 2G Ex h IIC T4 or T3 Gb and II 2D Ex tb IIIC T130 °C or T190 °C Db. Certificate: DEKRA 11ATEX0008 X. Confirm temperature class and zone on the nameplate.

Manual operation by the 200 mm handwheel does not rotate during electrical operation, and options include a lockable handwheel and a power tool with a square 30 mm or 50 mm drive.

Industrial Applications

The AUMA SAREx 10.2 is typically applied to medium-size control valves in refineries, gas plants and fuel terminals where modulating duty is needed in Zone 1 or Zone 2. Typical tasks include flow control in loading lines, level control in separators and pressure regulation in fuel-gas headers.

Seven Star LLC supplies the SAREx 10.2 across Oman, Sohar, Duqm and Salalah, with ATEX documentation and project-specific advice on speed selection and control-loop tuning.

Technical Specifications

The table summarises the AUMA SAREx 10.2; AUMA’s official data sheet is the binding reference.

Neighbouring sizes and counterparts: AUMA SAREx 07.6 explosion-proof modulating actuator, AUMA SAREx 14.2 explosion-proof modulating actuator, AUMA SAEx 10.2 explosion-proof actuator and AUMA SAR 10.2 modulating actuator.

Request a Quote for AUMA SAREx 10.2

Please send valve data and loop requirements to Seven Star LLC for an offer on the AUMA SAREx 10.2. The AUMA datasheet is on this page for download.