YS - Scotch Yoke Serie

The Scotch Yoke actuators series YS (Yoke Symmetric) end YC (Yoke Canted) have been designed to act rotary valves up to 1.700.000 Nm. Thanks to the torque curve of this mechanism, this series is particularly suited to move ball or butterfly valves, both ON/OFF and modulation ones.

The actuators have been designed by using finite elements calculation methods, the bodies have very high stiffness values to reduce misalignment and friction thus increasing efficiency and the actuator’s working life itself.

A wide range of variants will meet the different requirements of each plant and environmental use. Thanks to AFC expertise and flexibility, other solutions and certifications may be arranged and designed according to the customer specific needs.

MODULAR DESIGN
• Hydraulic or Pneumatic
• Single or Double acting
• Symmetric or Canted

CYLINDERS
• AIR Low pressure (up to 12bar)
• GAS Mid pressure (30/100bar)
• OIL High pressure (120/345bar)

MANUAL OVERRIDE
• Hydraulic hand pump
• Direct handwheel
• Gearbox + handwheel

Technical Features

  • To act rotary valves up to 1.800.000 Nm
  • Canted or Symmetric design to best adapt to the valve torque
  • Modulation and ON/OFF design to operate in all conditions
  • Multiple spring design, increased reliability and std. configurations
  • Guide bar to absorb lateral load and guarantee extended life
  • Easily visible local position indicator with Namur interface
  • Std. temperatures (-30° +100°); low (-60°) and high (+200°) on request
  • Suitable for high frequency and high-speed operation (< 0.2s)
  • In line external travel stop 90°±4° to eliminate asymmetrical loads
  • Compliant to PED 2014/68/UE and ATEX 2014/34/UE
  • Totally enclosed IP 66 construction; IP 67 and IP 68 on request
Hydraulic double acting with double cylinder

Up to 10.000 nm

Pneumatic single acting with manual gear

Up to 850.000 nm

Hydraulic single acting

Up to 1.700.000 nm