F-Series Flat Yoke™ Actuators

Our F-Series Flat Yoke™ Actuators are direct replacements for traditional scotch yoke actuators. Like our Q Series actuators, the design incorporates numerous considerations that simplify user installation, improve performance, and extend actuator life. Cylinders are weight-and-dimensionally balanced, eliminating a host of problems including the need for disassembly to change action from fail open to fail closed: fail action is changed simply by installing the actuator upside down. Failure-prone seals are designed out, replaced with readily available industry-standard O-rings. And bidirectional travel stops actually stop the piston motion, eliminating the considerable side loading that Yoke-located stops create.

Main Features

  • Available in Ductile Iron (FD Series) or
    316 Stainless Steel (FS Series) Construction
  • 2,000 to 2,000,000 pound-inches
  • Turn top side downward to reverse action
  • No side loading of shaft bushings,
    or of piston or piston rod
  • Center of gravity on shaft axis
  • COG does not change with shaft rotation
  • Bi-Directional Travel Stop stop the pistons,
    not the yoke
  • Double or single acting
  • Optional cylinder materials
  • NQA1, Safety-Related
Torque CalculatorLiterature Technical PapersDimensional Drawings