AUMA SAREx 16.2 Explosion-Proof Modulating Actuator

Overview

AUMA SAREx 16.2 is the sixth SAREx frame and the largest in gas group IIC: 500 to 1,000 Nm tripping torque (S4-25 %), up to 400 / 200 Nm modulating torque and an F16 flange.

Seven Star LLC, a trusted supplier of AUMA products, quotes the SAREx 16.2 for large control valves in hazardous areas across Oman and the GCC. Our Muscat team supplies documentation for ATEX files and loop-tuning advice. Related pages: SAREx series overview, SAEx explosion-proof actuators and AUMA SQEx explosion-proof part-turn actuator.

Operating Principle of the AUMA SAREx 16.2

With 500 to 1,000 Nm tripping torque, the SAREx 16.2 moves in pulses of at least 100 ms from an AMExC or ACExC positioner. Modulating torque is graded by speed band, from 400 / 200 Nm at 4 to 5.6 rpm down to 200 / 100 Nm at 63 to 90 rpm, and starts fall from 600 to 150 per hour.

Engineering Design of the SAREx 16.2

The SAREx 16.2 steps its modulating torque down from 400 Nm to 200 Nm as speed rises, and its starts per hour from 600 to 150. With a 100 ms minimum pulse and 72 to 88 kg weight, it is typically paired with slower speeds for precise positioning of large control valves. Plan lifting equipment and handwheel clearance (500 mm) before installation.

Cabling uses the AUMA Ex plug/socket connector (KT) with spring-clamp control terminals; the housing is IP68 and the optional heater is 12.5 W.

Key Features of the AUMA SAREx 16.2

What the AUMA SAREx 16.2 offers at a glance:

• Trip torque from 500 to 1,000 Nm for S4-25 % duty, up to 710 Nm for S4-50 %.
• Modulating torque up to 400 / 200 Nm (S4-25 % / S4-50 %).
• Speed range 4–90 rpm (50 Hz); permitted starts depend on the band.
• Approximate weight of 72 kg (4–22 rpm), 83 kg (32–45 rpm), 88 kg (63–90 rpm) and 500 mm handwheel.
• Motor power of 0.40–5.00 kW at 400 V; pulse timing 100 ms (same direction); on reversal 300 ms at 4 rpm down to 110 ms at 90 rpm.

Selecting the AUMA SAREx 16.2 for Your Valve

The SAREx 16.2 is the largest modulating Ex actuator on the 07.2 to 16.2 platform, with 500 to 1,000 Nm of tripping torque, an F16 flange and a 77 mm stem capacity. Modulating torque is graded in five steps from 400 Nm (4 to 5.6 rpm) to 200 Nm (63 to 90 rpm), and the permitted starts range from 600 to 150 per hour. The minimum pulse duration of 100 ms is double that of the smallest frames.

The SAREx 16.2 is the last group IIC frame in the SAREx range, with F16, a 77 mm stem and a 500 mm handwheel at 72 to 88 kg. The next size, the SAREx 25.1, brings group IIB, IP67 and only 8 to 11 rpm as standard.

AUMA SAREx 16.2 Modulating Torque and Starts by Speed

These are the modulating limits of the AUMA SAREx 16.2 by output speed, valid at nominal voltage and +40 °C. Tripping torque is adjustable up to 1,000 Nm (S4-25 %) or 710 Nm (S4-50 %). Illustrative calculation, not AUMA data: a control valve with 16 turns per stroke needs 171 s at 5.6 rpm, 21 s at 45 rpm and 11 s at 90 rpm for a full stroke.

Loop-tuning note: the SAREx 16.2 needs a 100 ms minimum pulse, and its reversal pulse ranges from 300 ms at 4 rpm to 110 ms at 90 rpm. Combined with 600 to 150 starts per hour, this suits slower control loops. Matching the controller’s update interval to the pulse data avoids hunting, and 16 to 22 rpm (150 to 140 ms on reversal, 300 starts per hour) is a typical middle ground.

Worked Sizing Example for the SAREx 16.2 (Illustrative Calculation)

A large pressure-control valve in a transmission station needs 320 Nm of modulating torque. The SAREx 16.2 supplies 400 Nm at 4 to 5.6 rpm, 350 Nm at 8 to 11 rpm and 300 Nm at 16 to 22 rpm. Only the first two bands therefore cover the valve, which limits the starts to 600 per hour and the output speed to 11 rpm or below. A fast loop would need a different actuator selection. This is an illustrative calculation, not AUMA data.

Motor and Electrical Data of the AUMA SAREx 16.2

4 speed points from AUMA’s separate electrical data sheet (S4-25 %, 400 V / 50 Hz), 0.40 to 5.00 kW; approximate values that are not part of the technical datasheet attached here.

Explosion Protection and Installation Notes for the AUMA SAREx 16.2

Standard ATEX markings of the SAREx 16.2 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.

Reversal pulses run from 300 ms at 4 rpm to 110 ms at 90 rpm. Intermittent duty S5-25 % needs insulation class H, and class F tropicalized is standard.

Industrial Applications

The AUMA SAREx 16.2 is intended for large control valves with up to 400 Nm modulating torque in hazardous areas, such as large pressure-control valves in gas-transmission stations, flow-control valves on export lines and big throttling valves in refineries.

Seven Star LLC delivers the SAREx 16.2 together with AMExC or ACExC Ex-rated controls, helping EPC contractors in Oman and the GCC to source a complete modulating actuator package from one trusted AUMA supplier.

Technical Specifications

Key figures for the AUMA SAREx 16.2, taken from AUMA’s technical data sheet.

Neighbouring sizes and counterparts: AUMA SAREx 14.6 explosion-proof modulating actuator, AUMA SAREx 25.1 explosion-proof modulating actuator, AUMA SAEx 16.2 explosion-proof actuator and AUMA SAR 16.2 modulating actuator.

Request a Quote for AUMA SAREx 16.2

Contact Seven Star LLC to buy the AUMA SAREx 16.2: send torque, loop and valve data and we return a firm offer. The AUMA datasheet is available on this page.