| Anybody who has ridden a bike with spring coil shock | | | | hydraulic cylinders. Double Acting Cylinders (DAC) |
| absorbers on hard undulating surfaces would know | | | | employ the force of air to move in two ways, in an |
| how different and efficient the damping is on a | | | | extend stroke and a retract stroke. Double Acting |
| pneumatic and hydraulic shock. The present day shock | | | | Cylinders have two ports, one for outstroke and one |
| is a very state of the art shock and vibration damping | | | | for in-stroke. |
| equipment that works on either compressed air power | | | | As the industry requirements may vary, pneumatic and |
| or fluids to dissipate the energy and the vibrations | | | | hydraulic cylinder come in a variety of bores and |
| generated from tyre contact with road surface. The | | | | strokes configurations. These may vary between |
| shock impulse is dissipated through the Pneumatic and | | | | being smaller than an inch all the way up to several |
| hydraulic cylinders with a sliding piston setup inside. The | | | | feet. The power of compressed air or air may range |
| cylinder is filled with a fluid or air, as the requirement | | | | from a few pounds per square inch to hundreds of |
| might be. Shock absorbers find use not only in the | | | | pounds creating enough power and force of a few |
| motor and automobile suspensions but in aircraft | | | | thousands of pounds. The pistons rods are usually |
| landing gear, in drilling equipment, in earth moving | | | | made of toughened alloy steel. Cylinder pipes are |
| equipment, in oil rigs and many other huge industrial | | | | seamless drawn and are precisely honed to the |
| machineries. The same principle behind shock | | | | smoothest finish to prevent corrosion and provide long |
| absorbers is employed in rail transport which limits the | | | | life for piston-seals. |
| yawing of bogies from side to side in a fast moving | | | | Valves present inside the pneumatic and cylinder help |
| train. | | | | regulate the flow of compressed air or fluids and |
| Pneumatic and hydraulic damping systems contain | | | | maintain the pressure inside the pressure inside the |
| pneumatic cylinders or hydraulic cylinders which | | | | pneumatic or hydraulic cylinder. Some pneumatic |
| employ a steel piston, a piston rod, a cylinder barrel | | | | cylinders reach 1000 mm in diameter, and are used in |
| setup to help deliver the damping effect. As | | | | place of cylinders for special circumstances where |
| compressed air or fluid moves into a pneumatic or | | | | leaking hydraulic oil could impose an extreme hazard. |
| hydraulic cylinders, it pushes the piston up or down | | | | Pneumatic and hydraulic cylinders also find application |
| through the length of the cylinder. The reflex action of | | | | in automated shutters in train and tram doors, and |
| the piston is either activated by either the compressed | | | | automated exits that are monitored and activated by |
| air or by a spring mechanism, which brings back the | | | | sensors. The low friction nature of arrangement in |
| spring to its original position. These are also called | | | | Pneumatic and hydraulic cylinders enable a smooth, |
| Single Action Cylinders. Cylinders come in a variety of | | | | slow-speed operation and at a low pressure which is |
| types and may either be pneumatic cylinders, electro | | | | a safety consideration in human traffic areas. |
| pneumatic cylinder, hydraulic cylinders or electro | | | | |