Quarter Turn

RPD/RPS

Double-acting and spring return pneumatic quarter-turn actuators for on-off and modulating control of valves in heavy duty service. Models available for output torques to 3,700 Nm.

Features & Benefits:

  • Totally enclosed, weatherproof housing in high strength nodular cast iron, suitable for use in hostile environments.
  • Constant output torque throughout the 90° stroke.
  • Adjustable bronze sliding block ensures low transverse forces.
  • Minimal friction nitrided rack.
  • Precise angular stroke adjustment between 80° and 100°.
  • Electroless nickel plated polished cylinder and square output shaft for corrosion resistance and minimal friction.
  • Low hysteresis and high sensitivity floatingtype piston seals prevent sticking problems.
  • RPS spring module is fully encapsulated, ensuring personnel safety and simplifying assembly.
  • RPS mountable as spring to close or spring to open without modification.
  • Lever or jackscrew manual override.
  • Extensive range of accessories available.
  • Special coatings for offshore or corrosive environments.

General application
RPD and RPS actuators are designed to provide maximum torque output with minimum supply pressure for any quarter turn application such as ball, plug, butterfly valves or dampers.

Approvals
Safety Integrity Level: (IEC 61508-1÷7:2010): SIL 3
Area Classification: (ATEX): II 2GD 135°C (T4)
Enclosure Standards: (IEC 60529): IP67M
(ANSI/NEMA 250): NEMA 4, 4X, 6
Pressure Equipment Directive: PED 97/23/EC
Machinery Directive: 2006/42/EC

Technical data
Supply pressure: 12 barg maximum
Supply medium: Air, nitrogen or sweet gas
Output torques: Up to 3,700 Nm
Ambient temperature
Standard range: -30°C to +100°C / -20°F to +210°F
Extended range: -60°C to +180°C / -70°F to +350°F

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Technical Data Sheets

RPD/RPS Pneumatic Actuator (Metric) (English)

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Certificates, Approvals & Qualifications

RPD RPS RPHD RPHS ATEX Ex II GD 135°C T4 (English)

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Certificates, Approvals & Qualifications

RPD RPS IP67M NEMA 4 4X 6 (English)

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Certificates, Approvals & Qualifications

RPS IEC 61508 SIL 3 (English)

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Certificates, Approvals & Qualifications

RPD IEC 61508 SIL 3 (English)

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Certificates, Approvals & Qualifications

EAC DoC Certificate All Pneumatic and Hydraulic Actuators (English)

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Certificates, Approvals & Qualifications

PED Module H H1 2019 07 (English)

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Certificates, Approvals & Qualifications

EN 60529 IP66, IP66M (English)

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