Rack and pinion pneumatic actuator in aluminium, 0–90°, 1276 Nm at 6 bar

Double acting and spring return, 0–90°, 1276 Nm at 6 bar, ISO 5211 F14 drilling. ATEX for zones 1/2/21/22.

ATEX

UKEX

DNV

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Rack and pinion rotary pneumatic actuator with a hard-anodised extruded aluminium body, for automating ball, butterfly and other quarter-turn valves. At 6 bar it delivers 1276 Nm double acting; in the spring return version with the standard spring set it gives 728 Nm air torque at start of stroke and 507 Nm spring torque at end of return.

The twin rack design balances internal forces and keeps torque constant throughout the stroke; the cam and adjustment screw chamber is separate from the piston chamber, reducing potential leak points. Travel is adjustable by ±5° in both opening and closing.

Features

Double acting (DA) and spring return (SR) operation
ISO 5211 drilling F14, 36 mm drive square
NAMUR top shaft and solenoid valve interface
Maximum pressure 8 bar, standard temperature −20…+85 °C
Lubricated for life, 100% functional and leak tested

Special versions

On request: high temperature up to +150 °C, low temperature down to −40 °C, nickel-plated or PTFE coated finish for corrosive environments, C5 special painting and 303 stainless steel pinion.

Use in hazardous areas

Non-electrical actuator compliant with ATEX Directive 2014/34/EU, marked II 2G Ex h IIC T6…T3 Gb and II 2D Ex h IIIC T85°C…T200°C Db: suitable for zones 1, 2, 21 and 22. It also holds DNV marine type approval.

Zone 1

Explosive gas atmosphere likely to occur in normal operation

Zone 2

Explosive gas atmosphere unlikely to occur and, if it does, only for a short period

Zone 21

Explosive dust atmosphere likely to occur in normal operation

Zone 22

Explosive dust atmosphere unlikely to occur and, if it does, only for a short period

# General Type: rack and pinion pneumatic actuator Operation: double acting (DA) and spring return (SR) Rotation: 0–90° with ±5° adjustment in opening and closing Body: extruded aluminium UNI 6060, hard anodised 45–50 µm End caps: die-cast aluminium, polyester powder coated Pinion: nickel-plated steel, anti-blowout design Seals: NBR (FKM for high temperature, silicone for low temperature) # Operating data Supply: compressed air Maximum pressure: 8 bar Standard working temperature: −20…+85 °C High temperature version: −20…+150 °C Low temperature version: −40…+85 °C # Torque Double acting torque at 6 bar: 1276 Nm Double acting torque at 4 bar 851 Nm, 5 bar 1063 Nm, 7 bar 1489 Nm, 8 bar 1701 Nm Spring return, standard spring set 06: air torque at 6 bar 728 Nm (start) / 458 Nm (end) Spring return, spring torque: 773 Nm (start of return) / 507 Nm (end of return) # Interfaces ISO 5211 drilling: F14 Drive square: 36 mm Top shaft and solenoid valve interface: NAMUR Air connections: G 1/4 # Performance Operating time at 6 bar (no valve): 3.08 s anticlockwise / 2.41 s clockwise Air volume per stroke: 5.7 l anticlockwise / 10.55 l clockwise Weight, double acting: 37 kg Weight, spring return: 55 kg # Certifications ATEX gas: II 2G Ex h IIC T6…T3 Gb ATEX dust: II 2D Ex h IIIC T85°C…T200°C Db Other: CE, UKEX, DNV marine type approval # Options on request Finishes: nickel-plated, PTFE coated, C5 special painting, 303 stainless steel pinion

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