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BR 31a - 2010

Pneumatic rotary actuator

USAGE

  • Throttling service
  • On/off service
  • Pressure swing adsorption (PSA)

ACTUATOR MOTION
Rotary

RATED ANGLE
90°

SUPPLY
Pneumatic

VERSION
Standard

FAIL-SAFE ACTION
Reversible

Special features

  • Single-acting and double-acting piston actuator
  • Suitable for strict requirements in chemical plants
  • Opening angle 90°
  • Signal pressures up to 10 bar
  • Torques from 5 to 11674 Nm
  • Temperatures from –40 to +80 °C
  • End positions adjustable within wide range (+5°/–15°)
  • Diagonal or parallel square drive position
  • Position indicator adjustable in steps of 45°
  • Encapsulated spring assemblies
  • Power transmission without clearance thanks to involute gearing
  • Direction of rotation reversible without requiring additional parts
  • Surface treatment tested by Kesternich sulfur dioxide corrosion test and salt spray test
  • Centering ring milled into the housing
  • Standardized attachment of valve accessories according to VDI/VDE 3845 or NAMUR
  • Simple attachment according to DIN EN ISO 5211
  • Blow-out-proof travel stop screws
  • Fast stroking speeds as standard

Accessories

Options

  • Continuous operation at temperatures from –15 to +150 °C
  • Silicone seals for operation at temperatures from –55 to +80 °C
  • Opening angles 120° and 180°
  • Dosing actuator with adjustable mid-position
  • Three-position actuator
  • Hydraulic adjustment of the rotation speed
  • Stainless steel rotary actuator
  • Travel stops extensible between 0° and 90° by using internal or external travel limitation
  • Special version with slotted screws and glued-in centering ring

Information

  • WA 313

    Flyer: Reliably Safe
    Series 31a Actuators
    [EN][DE]
  • T 8300

    Informations Sheet:
    Actuators
    Pneumatic, electric and electrohydraulic actuators for control valves and butterfly valves
    [EN][DE][PL][ES]
  • T 31a

    BR 31a · PFEIFFER Rotary Actuator Edition 2010
    Single and double acting piston actuator
    [EN][DE]

Support

  • EB 31a

    Rack-and-pinion Actuator BR 31a
    Type SRP and DAP
    [EN][DE]
  • SH 31a

    BR 31a Quarter-Turn Actuator
    Type SRP and DAP
    [EN][DE]

Certificates

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