Q-Series Rack & Gear™ Actuators

Our Q-Series Rack & Gear™ Actuators are direct replacements for traditional R&P actuators. The design incorporates numerous considerations that simplify user installation, improve performance, and extend actuator life. Cylinders are offset to eliminate internal cantilever loads. Low friction rollers support the racks; twin rails on the racks assure proper gear engagement. Shafts are pressure balanced to remove the pistoning effect common to R&P actuators. 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 pinion-located stops create.

Main Features

  • Available in Ductile Iron (QD Series) or               316 Stainless Steel (QS Series)
  • 100 to 15,000 pound – inches
  • Change action from ‘fail open’ to ‘fail closed’ by turning top side down
  • Patented low friction design for longest life
  • Top side standard with NAMUR accessory       drive geometry
  • Optional cylinder materials available
  • Fewer seals to wear
  • Captured springs
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