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Single-Acting, Load Return


Application
  • Intermittent use
  • Applies force in one direction; advance

Considerations
  • Lower cost compared to Spring Return and Double-Acting cylinders
  • More difficult to retract the plunger compared to both Spring Return and Double-Acting cylinders, especially in high capacity cylinders

Single-Acting, Spring Return


Application
  • Intermittent use
  • Applies force in one direction; advance

Considerations
  • Lower cost compared to Double-Acting cylinders
  • The spring will retract the plunger. This may take some time for high capacity and long stroke cylinders
  • Easier to retract the plunger compared to Load Return cylinders

Double-Acting, Hydraulic Return


Application
  • Higher cycle applications
  • Quick retraction required
  • Applies force in two directions; advance and retract

Considerations
  • More versatile
  • Easier to retract the plunger than Load Return and Spring Return cylinders
  • Able to control the retraction of the plunger
  • A pump with a 4-way valve is required
  1. Saddle
  2. Plunger
  3. Base
  4. Coupler
  5. Base Holes
  6. Collar Thread
  7. Wear Band
  8. Seal
  9. Spring
  10. Stop Ring
  11. Lifting Eye
  12. Lock-nut

Single-Acting, Load Return, Lock-nut

HCL Series

Single-Acting, Spring Return

RC Series

Double-Acting, Hydraulic Return

HCR Series

Lifting / Lowering (Jacking)


Return Types
Single-Acting and Double-Acting

Considerations
  • Direction of force – advance, retract, or both
  • Height constraints – weight, handle, lifting eyes
  • Capacity – tonnage (remember the 80% rule)

Holding


Return Types
Single-Acting and Double-Acting

Considerations
  • Holding mechanism – mechanical or hydraulic holding
  • Height constraints – collapsed height
  • Capacity – additional force required to release mechanical Lock-nuts (remember the 80% rule)

Pulling / Pushing


Return Types
Single-Acting and Double-Acting

Considerations
  • Piston type – solid or hollow piston
  • Direction of force – advance, retract, or both
  • Capacity – tonnage (remember the 80% rule)

Production / Pressing


Return Types
Double-Acting

Considerations
  • Mounting capabilities – collar threads, plunger threads, base mounting holes
  • Cycle – high or low cycles
  • Stroke – short, medium, long stroke
  • Capacity – tonnage (remember the 80% rule)