AUMA SAEx 14.2 Explosion-Proof Multi-Turn Actuator

Overview

AUMA SAEx 14.2 is the first SAEx frame on the F14 flange. Fourth in the series, it delivers 100–250 Nm (S2-15 min) and carries a 315 mm handwheel for open-close duty in hazardous areas.

Buyers in Oman and the GCC can source the SAEx 14.2 from Seven Star LLC, a trusted AUMA supplier, with a quotation that names torque, speed and controls. Sites in Sohar, Duqm and Salalah are served from Muscat. Also worth a look: Ex multi-turn range (SAEx), SAREx range and AUMA GS part-turn gearboxes.

Operating Principle of the AUMA SAEx 14.2

A 3-phase asynchronous motor drives the SAEx 14.2 through a reduction gear to the output drive. Limit switches stop the stroke, and adjustable torque switches protect valve and gearing in both directions. Self-locking applies up to 90 rpm at 50 Hz (108 rpm at 60 Hz) but not to the 125 and 180 rpm versions.

Engineering Design of the AUMA SAEx 14.2

Lifting is the main installation issue for the SAEx 14.2: at 48 to 52 kg it should be hoisted rather than carried, and the valve yoke and support must be checked for the extra weight. The 315 mm handwheel provides the leverage for manual operation, and commissioning should include setting the limit switches over the true stroke and the torque switches below the 250 Nm ceiling.

Cabling is by Ex plug/socket connector (KT), with control terminals in spring-clamp technology; the housing is IP68 and a 12.5 W motor heater can be added.

Key Features of the AUMA SAEx 14.2

Data points that matter most when specifying the SAEx 14.2:

• Adjustable trip torque from 100 to 250 Nm for 15-minute duty, 180 Nm for 30-minute duty.
• Run torque staged from 100 Nm to 80 Nm (S2-15 min) as output speed rises.
• 60 starts per hour at output speeds of 4–180 rpm (50 Hz).
• Approximate weight of 48 kg (4–11 rpm), 52 kg (16–180 rpm) and 315 mm handwheel.
• 0.12–1.80 kW motors at 400 V draw 0.5–5.3 A nominal current.

Selecting the AUMA SAEx 14.2 for Your Valve

The SAEx 14.2 is the first size with an F14 flange and a 58 mm stem capacity, and it is rated for up to 250 Nm tripping torque. Its 315 mm handwheel is a noticeable step up from the 200 mm wheel of the 10.2, which improves manual emergency operation of heavier gate and globe valves. The weight roughly doubles compared with the 10.2 (48 to 52 kg against 26 to 28 kg), so check support brackets and the load capacity of the valve yoke. Run torque is constant at 100 Nm (S2-15 min) up to 125 rpm.

The SAEx 14.2 is the first frame on the F14 flange, with a 58 mm stem capacity and 100 to 250 Nm, more than twice the 120 Nm ceiling of the SAEx 10.2. Valves above 250 Nm go to the SAEx 14.6, which keeps the flange but rises to 500 Nm.

AUMA SAEx 14.2 Torque and Speed Data

The following limits apply to the SAEx 14.2 at rated voltage and an ambient temperature of +40 °C. Illustrative calculation, not AUMA data: a valve needing 36 turns per stroke takes 540 s at 4 rpm, 98 s at 22 rpm and 12 s at 180 rpm.

Worked Sizing Example for the SAEx 14.2 (Illustrative Calculation)

A medium gate valve on a gas-compression station inlet is specified at 190 Nm seating torque. The SAEx 14.2 covers this at 250 Nm with a 60 Nm reserve, and run torque of 100 Nm up to 125 rpm will usually exceed what the stem needs in mid-travel. If the same valve is specified for fast shutdown at 180 rpm, the tripping torque of 200 Nm leaves only 10 Nm margin, so a lower speed or the 14.6 should be considered. This is an illustrative calculation, not AUMA data.

Motor and Electrical Data of the AUMA SAEx 14.2

5 speed points from AUMA’s separate electrical data sheet (S2-15 min, 400 V / 50 Hz), 0.12 to 1.80 kW; approximate values that are not part of the technical datasheet attached here.

Explosion Protection and Installation Notes for the AUMA SAEx 14.2

Standard ATEX markings of the SAEx 14.2 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.

AMExC or ACExC controls can still be added to an AUMA NORM actuator after delivery. With the X-marked certificate DEKRA 11ATEX0008 X, always read the special conditions of use before connecting.

Industrial Applications

The AUMA SAEx 14.2 suits heavier gate valves, large globe valves and medium-bore pipeline block valves in classified areas. Its 250 Nm range and 315 mm handwheel are typical for valves in crude gathering manifolds, gas-compression stations, and refinery process units where valve torque has outgrown the 10.2.

In Oman, such actuators appear on gas-processing trains, produced-water lines and LNG-related utilities. As trusted AUMA supplier, Seven Star LLC supplies the SAEx 14.2 with Ex certificates, torque curves and wiring diagrams ready for plant document packages.

Technical Specifications

Key figures for the AUMA SAEx 14.2, taken from AUMA’s technical data sheet.

Neighbouring sizes and counterparts: AUMA SAEx 10.2 explosion-proof actuator and AUMA SA 14.2 multi-turn actuator.

Request a Quote for AUMA SAEx 14.2

Send your RFQ for the AUMA SAEx 14.2 to Seven Star LLC, including valve data and control preference. The AUMA datasheet can be downloaded here, and every unit is supplied with local support.