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Double-Acting Pneumatic Piston Actuators (PDA)

Master Flo’s PDA double-acting pneumatic piston actuator is a testament to its reliability in handling the toughest service applications, particularly those found on offshore platforms. Our actuator boasts a strong performance history, making it a dependable choice for flow control.

Enhanced Corrosion Resistance

In response to the harsh environmental conditions in the industry, the PDA actuator is thoughtfully designed with environmental sealing. This feature significantly reduces the detrimental effects of corrosion, ensuring the longevity and durability of your equipment. Furthermore, the actuator’s innovative design eliminates exposed linkages, further bolstering its resistance to corrosion.

Precise Control with Rigid Operation

Operating on a minimum of 80 psi pneumatic supply, the double-acting piston actuator provides a robust control system, making it ideal for high-pressure choke valves. Its internal spring mechanism ensures fail-closed operation in the event of a loss of pneumatic or electrical signal. For added versatility, PDAs are available with single, double, and triple-spring configurations.

Choose Master Flo’s PDA double-acting pneumatic piston actuator for dependable performance and resilience in challenging environments.


  • Carbon or low alloy steel

Operating Temperature

  • Standard: -20 F to 150 F (-28 to 66 C)


  • Open yoke
  • Manual override (handwheel)
  • Right-angle mount

Fail Action

  • Spring fail close
  • Fail lock

Control Signal (positioner dependent)

  • 4-20 mA
  • HART
  • Fieldbus

Feedback Signal

  • 4-20 mA
  • HART
  • Fieldbus

Hazardous Area Certification (positioner dependent)

  • CSA/FM/UL: Explosion Proof or Intrinsically Safe
  • ATEX/IEC: Intrinsically Safe or Flameproof

Piston Area (square inches)

  • PDA 50: 46
  • PDA 100: 91
  • PDA 200: 185
  • PDA 300: 300

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