What is a rack and pinion pneumatic actuator?

A rack and pinion actuator uses a circular gear (pinion) engaged with toothed bars (racks) on both sides of a piston. Air pressure on one side of the piston drives the racks linearly, which rotate the pinion to produce 90-degree output rotation. Double acting means air pressure controls both extension and retraction. This design is the global standard for pneumatic valve automation due to its efficiency, compactness, and precise 90-degree rotation for ball and butterfly valve operation.

What maintenance is required for rack and pinion actuators?

Rack and pinion actuators require minimal maintenance: inspect and replace air filter elements (quarterly); check for air leakage at cylinder body seals and pinion bearings (annually); verify pinion rotation is smooth and within +/- 5 degrees of 90-degree travel; clean and grease the pinion teeth if disassembled; and replace NBR seals if cracking or hardening is observed. With clean air supply and proper sizing, these actuators typically operate 20+ years without major maintenance.

What ATEX certifications are available for rack and pinion actuators?

ATEX certified actuators carry II 2G Ex h IIC T5/T6 Gb marking, approved for Zone 1 (likely explosive atmosphere) and Zone 2 (abnormal explosive atmosphere). The 'h' code (non-electrical equipment with enhanced safety) covers mechanical sparking, static electricity, and hot surface ignition hazards. For dust atmospheres (Zone 21/22), II 2D Ex h IIIC T80 deg C Db certification is available. ATEX certification is mandatory for oil & gas, petrochemical, and chemical processing projects in Europe and increasingly specified globally.

Rack Pinion Actuator Double Acting - Supreme Valves India

4.8/5 (82 reviews) ISO 5211 India Made

Pneumatic Components

Rack & Pinion Double Acting Pneumatic Actuator

Name: Rack Pinion Actuator Double Acting
Brand: Supreme Valves India
SKU: pneumatic-rack-pinion-actuator-double-acting
Availability: InStock
Rating: 4.8 (82 reviews)

Rack and pinion double acting pneumatic actuator. ISO 5211 mounting. Torque 9 Nm to 4000 Nm. ATEX certified. For ball valves, butterfly valves, and dampers.

Key Specifications

Category: Pneumatic Components

Brand: Supreme Valves India

Origin: Ahmedabad, Gujarat

Certification: ISO 9001:2015

In-stock: Standard sizes ship within 3-5 working days from Ahmedabad. Export packaging available.

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Materials of Construction (MOC)

Component	Material Specification
Body & Bonnet	Ductile Iron (ASTM A536 / EN-GJS-400-15)
Stem / Spindle	SS 410 / SS 420
Seat / Trim	EPDM / NBR / Bronze

Technical Specifications

Parameter	Specification / Standard
Manufacturing / Design Standard	EN 1171 / AWWA C509 / BS 5163
Testing Standard	API 598 / EN 12266-1
Pressure Rating	PN16 / PN25