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ZRA Series

ZRA Series

The ZRA Series by Zeetork is a 100% stainless steel rack-and-pinion pneumatic actuator engineered for durability and precision. It converts energy from pressurized air into rotary motion to automate quarter-turn valves like ball and butterfly types. It is suitable for both on-off and modulating applications.

  • Performance & Parameters:
  • Operating Pressure: 2 to 8 bar (Max 10 bar)
  • Temperature Range:
  • Standard (NBR): -20°C to +80°C
  • Low Temp (L NBR): -35°C to +80°C
  • High Temp (Viton): -15°C to +150°C
  • Materials:
  • Body/End Caps: SS304 or SS316 (investment casting)
  • Pinion, Pistons, and Screws: SS304/316
  • Bearings and Washers: POM
  • Seals: NBR / L NBR / Viton
  • Spring: Coated spring steel
  • Air Consumption:
  • Varies from 0.08L to 66.97L depending on size and actuation type
  • Mounting & Adjustment:
  • ISO 5211 base for valve mounting
  • NAMUR interface for accessories
  • External adjustable travel stops (±5°)
  • Compatible with solenoid valves, positioners, and limit switches
  • Key Benefits:
  • Increases operational safety and minimizes manual valve handling
  • High reliability with >1 million cycle tested design
  • Fast, precise, and maintenance-free actuation
  • Wide torque and pressure handling for diverse valve sizes
  • Modular spring design supports easy torque adjustment

Actuator Mechanism​

  • Double acting :

Air to port A forces the pistons outwards, causing the pinion to turncounterclockwise while the air is being exhausted from port B. Air toport B forces the pistons inwards, causing the pinion to turn clockwisewhile the air is being exhausted from port A.​

Pneumatic Actuator
  • Single acting :

Air to port A forces the pistons outwards, causing the springs tocompress, the pinion turns counterclockwise while air is beingexhausted from port B. Loss of air pressure on port A, the storedenergy in the springs forces the pistons inwards. The pinion turnsclockwise while air is being exhausted from port A.​

Pneumatic Actuator
Rotary actuators Series ZR Description Material Double acting Torque (Nm) Single acting Torque (Nm)
  A Stainless Steel (SS) rack and pinion actuator offers several advantages depending on the application 100% Stainless steel 6 to 13000 5 to 6584

Disclaimer

All data are for general information, subject to change without prior notice. Kindly contact us to reconfirm specific data where required.

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Frequently Asked Questions

The ZRA Series by Zeetork is a rack-and-pinion pneumatic actuator made entirely of stainless steel. It converts pressurized air energy into rotary motion, automating quarter-turn valves like ball and butterfly types. Designed for high durability and precision, it suits both on-off and modulating applications, offering reliable performance in various industrial environments. Its robust design is tested for over 1 million cycles, ensuring long-term operation without frequent maintenance.

The ZRA Series operates at pressures from 2 to 8 bar (up to 10 bar max). Temperature ranges depend on seal materials: Standard (NBR) handles -20°C to +80°C, Low Temp (L NBR) supports -35°C to +80°C, and High Temp (Viton) works from -15°C to +150°C. This wide range ensures adaptability in different climates and industries, providing consistent performance in harsh environments while supporting precise valve automation.

The ZRA Series actuator features high-quality materials for enhanced durability. The body and end caps are made of SS304 or SS316 stainless steel via investment casting. Internal components like pinions, pistons, and screws are also stainless steel (SS304/316), while bearings and washers use POM for wear resistance. Seals are available in NBR, L NBR, or Viton, ensuring compatibility with various temperature and chemical conditions, making the actuator suitable for demanding industrial applications.

The ZRA Series actuator improves operational safety by automating valve movement, reducing manual handling risks. Its precise pneumatic control allows reliable quarter-turn operation, and external adjustable travel stops ensure exact positioning (±5°). It supports solenoid valves, positioners, and limit switches, offering full integration flexibility. The modular spring design simplifies torque adjustment, while its >1 million cycle tested reliability ensures consistent performance, minimizing maintenance needs and increasing overall plant safety.

The ZRA Series pneumatic actuator’s air consumption varies from 0.08L to 66.97L per actuation, depending on actuator size and type. It mounts easily using an ISO 5211 base, providing standardized valve attachment. A NAMUR interface enables easy accessory installation, including positioners and limit switches. External adjustable travel stops allow fine control of operation angles (±5°). This combination of efficient air use and flexible mounting ensures optimal integration in automated valve control systems.

Pneumatic Actuator

Data Sheet - ZRA
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Contact Us

  • Singapore : +65 68505141
  • India : +91 422 6794275
  • sales@zeetork.com
  • Singapore : Zeetork Automation & Control Pte Ltd,
    22 Sin Ming Lane, #06-76, Midview City, Singapore-573969
  • India : Zeetork Automation & Control Private Limited, S.F.NO 617/2H2, Vadakku Thottam, Malumichampatti P.O, L&T Road, Coimbatore-641021

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