Rod and Piston Seals

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Rod and buffer seals maintain sealing contact in sliding motion between the cylinder head and the piston rod. A rod sealing system can consist of a rod seal and a buffer seal or a rod seal only.  Rod sealing systems for heavy duty applications typically consist of a combination of both seal types.  The buffer seal is arranged between the rod seal and the piston in the cylinder head. Rod seals determine the tolerance for the rod diameter. 

Rod seals provide a thin lubrication film on the piston rod that lubricates themselves and the wiper seals. The lubrication film must be thin enough so that it returns to the cylinder during the return stroke.

Piston seals maintain sealing contact between the piston and the cylinder bore.  Piston seals are typically classified into single-acting (pressure acting on one side only) and double-acting (pressure acting on both sides) seals.

Rocket Seals is a leading seal and O-Ring specialist, supplying sealing products for all industrial applications.  For over 60 years, we have served the growing and changing needs of industry, partnering with leading manufacturers to update and expand our inventory to provide products that meet your latest needs.

Contact Rocket Seals today to see how we can solve your sealing challenges.

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