Keystone Electric Actuators Double acting OLGA actuator for 90° operation for On-Off and Modulating heavy duty service

Features & Benefits:

• Totally enclosed, weatherproof housing in fabricated carbon steel for maximum strength
• Canted scotch yoke actuators are the proper solution to motorise the most common type of quarter-turn valves, due to their dedicated torque trend; they are suited to the larger valve sizes where high break away torques are required or for valves with high working pressure
• Symmetric scotch yoke actuators available for special applications
• External travel stops for precise angular stroke adjustment between 82° and 98°
• Hard chromium plated and polished guide bar and piston rod for corrosion resistance and minimal friction
• Bushings made of bronze or sintered bronze, charged with teflon, to provide minimal friction and extended service life
• Electroless nickel plated and polished cylinder for corrosion resistance and minimal friction
• Piston and piston rod seals made by a teflon ring precharged by an O-ring provide low hysteresis and high sensitivity, preventing sticking problems
• Jackscrew or hand pump manual override available
• An extensive range of accessories are available:
  - limit switch boxes – explosionproof, intrinsically safe and/or weatherproof
  - limit switches can be provided in different types according to customer requirements
  - position transmitters – explosionproof, intrinsically safe and/or weatherproof
  - oil filters
  - solenoid valves – explosionproof, intrinsically safe and/or weatherproof
  - control units for modulating service:

- electrohydraulic “step-by-step” – electrohydraulic proportional valves complete with electronic control panel – electrohydraulic servovalves
- spool-type or poppet-type (no leakage) control valves
- dump valves, flow regulators, relief valves
- electric pressure switches
- bladder-type or piston-type accumulators ISPESL and TÜV stamped. Accumulators in accordance with different codes on request
- electrohydraulic power packs, with explosionproof and/or weatherproof protection, assembled on the actuator or separate from the actuator
- terminals enclosures, pushbutton panels – explosionproof or intrinsically safe and/or weatherproof

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