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

Rack and pinion double acting pneumatic actuator. ISO 5211 mounting. Torque 9 Nm to 4000 Nm. ATEX compliant. 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

Frequently Asked Questions

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 compliant 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.