Hydraulic cylinders are being used in mechanical applications where reciprocating forces and movements are needed.
Pneumatic cylinders are widely used in mechanical applications that require low forces with high reciprocating sliding speeds.
Guide elements do have very important role for sealing elements to function properly in hydraulic and pneumatic systems.
There appears a lot of problems because of incorrect assemblage of hydraulic and pneumatic sealing elements.
Most polymeric items including vulcanized rubber and other elastomers tend to change their properties during storage and may become unserviceable.