Air cylinder producers usually generate two essential kinds of air cylinders: single acting and binary acting. The single acting cylinders are capable to perform an operating activity in one single direction. A single acting air cylinder further has air pressure on the one side of a piston flange, delivering force and motion, and a coil delivering the return power after force release. Single acting cylinders need just about half the amount of air used by a binary acting cylinder for any single working cycle. A binary acting pneumatic cylinder carries the powered of motion in common two directions, with pressure on both the sides. When a cylinder is pressed out in one single direction, compressed air moves it back in an additional direction. Air lines consecutively into two ends of the cylinder provide the compressed air.

Pneumatic systems generate large linear pressure group and comprise of an input, a course and the output. In this, the input acts as a compressed air from the compressor or from the hand pump. The course is a control device, which directs the air to the bar end or bottom of the container and the output is an expanding or withdrawing piston rod. Pneumatic schemes are used to move, pull, and lift and for other open/close doors in material management and processing. They could also hold, take away and place materials or pieces for the purpose of manufacturing.

Each time one of these factors inhibits the rod or tooling travel ¨C even by a little bit - there will be a momentary hesitation in that rod travel as the air pressure inside the cylinder builds to the level necessary to overcome that inhibition. This changes cylinder rod speed and timing inconsistently and continuously.

The use of pneumatic flow controls will do much to reduce the impact of the speed and stroke time variations but they cannot ensure that your cylinder stroke and timing will be consistent all the time, as the air that they are throttling will compress as it¡¯s being restricted, resulting in changing stroke speed and time. These changes will be less than if no flow controls were used, but if you need really consistent cylinder operation, then you need to consider alternates.

Consider a hydraulic system.

A hydraulic cylinder uses oil which is theoretically incompressible. With hydraulic flow controls lowering the cylinder speed and time-of-stroke below the available hydraulic force from the power-pack, you can be virtually certain of consistent stroking every time.

There are many circumstances, not the least of which is cost, that make an all-hydraulic system unacceptable. If that is the case, then the next option to deliver stroke-to-stroke consistent speed and timing is to use an air over oil system.