Piston Seals are used in hydraulic & Pneumatic cylinders and, as the name suggests, are designed to seal between the piston and the cylinder ensuring that pressurised fluid does not leak across the cylinder head as the system pressure pushes the piston down the cylinder bore.
The choice of piston seal is decided by the way in which the given cylinder works. For a single-acting, capable of sealing dynamic pressure from one side, it is best to choose the type of seal designed to provide optimum sealing qualities for single-acting functions.
The best sealing capacity of a double-acting cylinder, capable of sealing dynamic pressure from either side, is achieved by choosing a double-acting seal.
Piston seals, both single and double-acting, can be designed for, and used with, integrated or separate back-up rings and guide rings.Technical Information