SHARPE VALVES Sonic Torque Pneumatic Actuator Series 4×4™
Why Smaller is Better
The Sharpe Pneumatic Actuator Series 4 x 4 packs more than double the torque of conventional rack and pinion actuators. Due to its four pistons that generate torque around a centrally located pinion. With more pistons in the actuator, it allows their diameter to be smaller while generating higher torque. At the same time, it means the size of the actuator can be more compact.
Why Smaller is Faster
With four small cylinders each located on one of four sides of the unit and at a given air pressure, the 4 x 4 produces the same torque output as double piston models using smaller diameter pistons and a narrower pinion. Thanks to the narrower pinion, the pistons travel shorter distances so that they can move faster from one position to the next.
Why Smaller Reduces Air Consumption
The cube shape coupled with pistons traveling shorter distances minimizes size requirements while maximizing torque output. At the same time, shorter piston travel and compact size greatly reduces pressure requirements compared to other designs and results in reduced energy expenditures
Why Smaller Means Less Stress
It’s a matter of balance. Unlike other designs that produce an off-axis thrust, the 4 x 4 design positions each piston around the cube so they develop thrust along their own axis. As a result, stressful piston side loading is minimized putting less stress on seals resulting in less wear.
Why Smaller is a Better Solution
Because of the four-cylinder design, the 4 x 4 has many more spring combination possibilities than double piston actuators. This means better solutions under any air pressure requirement. Each chamber can use up to three different spring sizes which nest between the covers and pistons and align by centering rings. Also, springs are wound in opposite directions to avoid tangles during operation.
Why Smaller is Stronger
For superior corrosion resistance, the body and covers are anodized internally and externally. Plus, they have an external epoxy base layer and a second polyurethane paint to further reduce corrosion in demanding applications. Extended spray wash downs do not create corrosion problems for the actuator.