AUMA SAEx 35.1 Explosion-Proof Multi-Turn Actuator

Overview

AUMA SAEx 35.1 takes the Ex multi-turn range to 2,500–8,000 Nm (S2-15 min) as ninth frame, mounted on F35 with a 400 mm handwheel.

Seven Star LLC, as trusted AUMA supplier, provides the SAEx 35.1 across Oman and the GCC together with the documentation needed for an ATEX project file. Muscat engineers advise on lifting and installation for sites near Sohar and Salalah. See also: SAEx range, SAREx modulating Ex actuators and AUMA TIGRON TR-M explosion-proof multi-turn actuator.

Operating Principle of the AUMA SAEx 35.1

The SAEx 35.1 turns its output drive with a 3-phase squirrel-cage motor through a large reduction gear; end positions come from counter gears and torque switches guard both directions up to 8,000 Nm. Self-locking applies only up to 22 rpm at 50 Hz, so faster versions need the valve to hold position. AMExC or ACExC controls drive it.

Engineering Design of the AUMA SAEx 35.1

The SAEx 35.1 weighs 415 to 430 kg, so installation needs certified lifting equipment and a structurally verified valve support. Reduction ratios between 184 : 1 and 33 : 1 mean that manual operation by the 400 mm handwheel is slow, so many users add a power tool for emergency operation. Confirm the F35 flange, the 155 mm stem bore and the speed-dependent torque limit before ordering.

Wiring goes by direct terminal connection with motor terminals in a separate compartment. The standard enclosure is IP67 with IP68 optional, and the heater option is 12.5 to 25 W.

Key Features of the AUMA SAEx 35.1

What the SAEx 35.1 offers at a glance:

• A torque window of 2,500–8,000 Nm (S2-15 min); the S2-30 min ceiling is 5,700 Nm.
• Speed-dependent run torque between 2,800 Nm and 1,500 Nm at S2-15 min.
• 30 starts per hour at output speeds of 4–90 rpm (50 Hz).
• Approximate weight of 415 kg (4–22 rpm), 430 kg (32–90 rpm) and 400 mm handwheel.
• Motor ratings of 4.0–30 kW (400 V) with 20–65 A nominal current.

Selecting the AUMA SAEx 35.1 for Your Valve

The SAEx 35.1 is a heavy-duty frame for 2,500 to 8,000 Nm tripping torque with an F35 flange and a 155 mm stem capacity. Its speed range stops at 90 rpm, and above 45 rpm the maximum torque is stepped down to 6,400 Nm at 63 rpm and 5,500 Nm at 90 rpm. The reduction ratios are very high (184 : 1 down to 33 : 1), which is why the handwheel is a 400 mm unit even though the actuator weighs 415 to 430 kg. Maximum starts are limited to 30 per hour, so this frame is an on-off isolation actuator, not a frequently cycled one.

Frame 35.1 handles 2,500 to 8,000 Nm on F35 with a 155 mm stem, but only 30 starts per hour. Valves that need up to 16,000 Nm are the territory of the SAEx 40.1 on F40, a 175 mm stem and 20 starts per hour.

AUMA SAEx 35.1 Torque and Speed Data

The following limits apply to the SAEx 35.1 at rated voltage and an ambient temperature of +40 °C. Illustrative calculation, not AUMA data: a valve needing 90 turns per stroke takes 1,350 s at 4 rpm, 245 s at 22 rpm and 60 s at 90 rpm.

Worked Sizing Example for the SAEx 35.1 (Illustrative Calculation)

For a main-line isolation valve with 6,100 Nm seating torque and 1,800 Nm running torque, the SAEx 35.1 offers 8,000 Nm for speeds up to 45 rpm and 2,000 Nm of run torque at 32 to 63 rpm. At 90 rpm the tripping torque is 5,500 Nm and the run torque 1,500 Nm, which would not cover this valve. The example shows why the 90 rpm variant is reserved for valves with much lower torque demand. This is an illustrative calculation, not AUMA data.

Motor and Electrical Data of the AUMA SAEx 35.1

5 speed points from AUMA’s separate electrical data sheet (S2-15 min, 400 V / 50 Hz), 4.0 to 30 kW; approximate values that are not part of the technical datasheet attached here.

Explosion Protection and Installation Notes for the AUMA SAEx 35.1

Standard ATEX markings of the SAEx 35.1 per AUMA: II 2G Ex db eb IIB T4 or T3 Gb, II 2G Ex h IIB T4 or T3 Gb and II 2D Ex tb IIIC T130 °C or T190 °C Db. Certificate: TÜV 14 ATEX 7542 X. Confirm temperature class and zone on the nameplate.

At 415 to 430 kg, installation needs certified lifting equipment. The handwheel allows setting and emergency operation, and a power tool with square 30 mm or 50 mm drive is an option.

Industrial Applications

The AUMA SAEx 35.1 is used on very large isolation valves in major oil, gas and petrochemical installations. Typical positions include pipeline entry and exit valves, large storage-tank outlet valves and big cooling-water or feed-line valves in classified areas where up to 8,000 Nm is required.

Because of the 30-starts-per-hour limit and the 415 to 430 kg weight, this frame is normally specified for infrequently operated block valves. Seven Star LLC supports Omani EPC contractors with quotations, delivery planning and technical documentation for the SAEx 35.1.

Technical Specifications

The table summarises the AUMA SAEx 35.1; AUMA’s official data sheet is the binding reference.

Neighbouring sizes and counterparts: AUMA SAEx 30.1 explosion-proof actuator, AUMA SAEx 40.1 explosion-proof actuator and AUMA SA 35.1 multi-turn actuator.

Request a Quote for AUMA SAEx 35.1

For a quotation on the AUMA SAEx 35.1, send Seven Star LLC your valve torque, flange and stem details. The datasheet can be downloaded on this page, with warranty and regional support for each unit.