AUMA SAEx 07.6 Explosion-Proof Multi-Turn Actuator

Overview

AUMA SAEx 07.6 is the second frame of the Ex multi-turn range, built for open-close valves that need 20 to 60 Nm (S2-15 min). It mounts on F07 / F10 and keeps the 160 mm handwheel of the smaller frame.

Seven Star LLC supplies the SAEx 07.6 as a trusted supplier of AUMA products for the Sultanate of Oman and the GCC, with factory documentation and warranty. Our Muscat team follows each order from enquiry to delivery for sites in Sohar and Salalah. Compare it with the SAEx explosion-proof actuators, the SAREx series overview and the AUMA SQEx explosion-proof part-turn actuator.

Operating Principle of the AUMA SAEx 07.6

The SAEx 07.6 turns its output drive with a 3-phase AC motor through a reduction gear stage. Counter gears set the end positions, and the torque switches stop the motor when a seized valve pushes the load beyond the set trip value, which can be up to 60 Nm. Operation needs an AMExC or ACExC control, and holding torque is provided by self-locking up to 90 rpm.

Engineering Design of the AUMA SAEx 07.6

With 60 Nm available, the SAEx 07.6 leaves headroom for valves whose torque rises with time through deposits, packing friction or temperature. Its 22 to 24 kg mass is still within reach of two people, and the 160 mm handwheel allows operators to confirm free movement by hand during commissioning before the motor is energised. Because the 07.6 and 07.2 share the F07/F10 flange options, a valve prepared for the 07.2 can usually take the 07.6 without changing the valve-side interface.

Terminations follow the same pattern as the 07.2: an Ex plug/socket connector (KT), spring-clamp control terminals and an IP68 enclosure, with a 12.5 W heater available as an option.

Key Features of the AUMA SAEx 07.6

Data points that matter most when specifying the SAEx 07.6:

• A torque window of 20–60 Nm (S2-15 min); the S2-30 min ceiling is 40 Nm.
• Speed-dependent run torque between 21 Nm and 15 Nm at S2-15 min.
• Speed range 4–180 rpm (50 Hz) and a limit of 60 starts per hour.
• Handwheel diameter 160 mm, approximate weight 22 kg (4–22 rpm), 24 kg (32–180 rpm).
• Motor ratings of 0.03–0.50 kW (400 V) with 0.4–1.9 A nominal current.

Selecting the AUMA SAEx 07.6 for Your Valve

The SAEx 07.6 is the choice when a valve needs between 30 and 60 Nm and the installation already uses the F07/F10 flange pattern of the smallest frame. It doubles the torque of the SAEx 07.2 without adding a flange size, keeps the 160 mm handwheel and weighs just 22 to 24 kg. Specifiers frequently pick it as a margin size: if the valve manufacturer quotes 35 to 45 Nm seating torque, the 07.2 would be too small, while the next frame up (10.2) would be oversized and offer only the F10 flange.

The SAEx 07.6 doubles the torque ceiling of the 07.2 from 30 to 60 Nm at nearly the same mass, 22 to 24 kg against 22 to 23 kg. Above 60 Nm the SAEx 10.2 offers 120 Nm on the F10 flange with a larger 200 mm handwheel.

AUMA SAEx 07.6 Torque and Speed Data

These are the torque limits of the AUMA SAEx 07.6 by output speed, valid at nominal voltage and +40 °C. Illustrative calculation, not AUMA data: a valve needing 24 turns per stroke takes 257 s at 5.6 rpm, 45 s at 32 rpm and 12 s at 125 rpm.

Worked Sizing Example for the SAEx 07.6 (Illustrative Calculation)

Imagine a fuel-gas isolation valve whose manufacturer specifies 48 Nm seating torque and 30 Nm running torque. The SAEx 07.6 provides 60 Nm tripping torque, which covers the seating torque, but its run torque is only 21 Nm at S2-15 min up to 45 rpm. With 30 Nm of running torque this valve exceeds that limit, so the SAEx 10.2 (42 Nm run torque at up to 63 rpm) should be checked instead. Where the running torque stays below 21 Nm, the 07.6 saves the cost, weight and handwheel size of the next frame. This is an illustrative calculation, not AUMA data.

Motor and Electrical Data of the AUMA SAEx 07.6

5 speed points from AUMA’s separate electrical data sheet (S2-15 min, 400 V / 50 Hz), 0.03 to 0.50 kW; approximate values that are not part of the technical datasheet attached here.

Explosion Protection and Installation Notes for the AUMA SAEx 07.6

Standard ATEX markings of the SAEx 07.6 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.

Where PTC thermistors are specified, the actuator controls must contain a matching tripping device; the DEKRA 11ATEX0008 X certificate carries the X suffix, so its special conditions of use belong in the project file.

Industrial Applications

The AUMA SAEx 07.6 fits slightly larger hazardous-area valves than the 07.2, typically small gate valves, globe valves and ball valves driven through a part-turn gearbox on gas-processing skids, fuel-loading arms and tank-farm drain lines. Its 60 Nm tripping torque gives headroom for valves that gain stiffness after years of service in dusty, hot Omani conditions.

Water-injection manifolds, produced-water treatment skids and chemical dosing packages in classified zones are further typical uses. Seven Star LLC can quote the SAEx 07.6 together with matching Ex-rated controls and cable glands for projects in Salalah and the Sohar industrial zone.

Technical Specifications

The table summarises the AUMA SAEx 07.6; AUMA’s official data sheet is the binding reference.

Request a Quote for AUMA SAEx 07.6

Ask Seven Star LLC for pricing on the AUMA SAEx 07.6: valve make, torque and the preferred AMExC or ACExC control are enough to start. You can open the AUMA datasheet from the download link on this page.