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ZRD Series

ZRD Series

The ZRD Series by Zeetork is a high-performance rack and pinion pneumatic actuator line engineered for long-life, high precision valve automation. The ZRD Series is trusted globally across industries due to its durable design, superior materials, and field-proven performance.
  • Operating Principle:
  • Double Acting (DA): Air to Port A drives pistons outward; air to Port B retracts pistons
  • Single Acting (SA): Air compresses springs during actuation; loss of pressure triggers fail-safe
    return
  • Performance Overview:
  • Air Pressure: 2–8 bar (recommended 5 bar)
  • Temperature Range:
  • Standard: –20°C to +80°C (NBR)
  • High Temp: up to +150°C (Viton)
  • Low Temp: down to –60°C (LNBR + Silica)
  • Media:
  • Dry/lubricated air or non-corrosive gas (<30μm particles)
  • Torque Range:
  • Double Acting : 4.8 Nm to 13,024 Nm (at 2–8 bar)
  • Single Acting : Wide spring configurations from 5 to 16 springs; outputs from 3.8 Nm to 9,231 Nm
  • Cycle Time (at 5 bar, no load):
  • Double Acting: 0.1 to 31 sec (size-dependent)
  • Single Acting: up to 54 sec (depending on spring count)
  • Air Consumption (cc per cycle):
  • ZRD2: 60/70 → ZRD36: 52,600/56,000 (open/close)
  • Benefits:
  • Fail-safe operation with spring return
  • Modular spring tuning for customized torque
  • Maintenance-free PTFE-guided piston operation
  • High corrosion resistance with optional coatings
  • Easy integration with solenoid valves and accessories

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)
  D High-performance rack and pinion pneumatic actuator line engineered for long-life, high-precision valve automation​​ Extruded aluminum alloy ​ 4 to 13000​​ ​4 to 9523​

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 ZRD Series by Zeetork is a high-performance rack-and-pinion pneumatic actuator designed for precision quarter-turn valve automation. Known for durability and field-proven performance, it operates in both Double Acting (DA) and Single Acting (SA) modes. DA models use air pressure to drive pistons, while SA models provide fail-safe spring return. Suitable for harsh environments, the actuator handles air pressures of 2–8 bar and operates in wide temperature ranges, making it ideal for industrial applications.

ZRD Series actuators work under 2–8 bar air pressure and can operate in extreme conditions: –20°C to +80°C (Standard), up to +150°C (High Temp), and down to –60°C (Low Temp). They support dry/lubricated air or non-corrosive gases. Torque outputs range from 3.8 Nm to over 13,000 Nm, depending on the model and configuration. Cycle times vary by size and spring setup, while air consumption is optimized for efficiency. They are reliable, precise, and maintenance-free.

The ZRD Series offers reliable, fail-safe operation via spring return, modular spring configurations for customized torque, and maintenance-free PTFE-guided pistons. Its corrosion-resistant construction makes it suitable for tough environments, with optional coatings available. The actuator supports easy integration with solenoid valves and control accessories, ensuring seamless compatibility in automation systems. Proven worldwide in industries, it provides precise control of quarter-turn valves under demanding conditions, ideal for long-term industrial use.

The ZRD Series offers fail-safe operation through its Single Acting (SA) models. In normal operation, air pressure compresses springs, and pistons actuate the valve. Upon pressure loss, the stored spring force automatically returns the actuator to its safe position, preventing system failure. This mechanism ensures reliability and safety in critical processes. Additionally, modular spring configurations allow fine-tuning of output torque to match application-specific needs, providing flexibility and safety in automation systems.

ZRD Series actuators provide precise and reliable valve automation with long service life. Key benefits include fail-safe spring return, modular spring configurations for torque customization, and maintenance-free PTFE-guided pistons. Operating in wide temperature ranges and with high corrosion resistance, they perform well in challenging industrial environments. With torque outputs up to 13,024 Nm and optimized air consumption, they are efficient. Easy integration with solenoid valves and accessories further simplifies industrial automation implementation.

Pneumatic Actuator

Data Sheet - ZRD
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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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