AF-519 is a single and double-acting piston seal that is specifically designed for applications involving short-stroke or micro movements in high-frequency linear movements. It is symmetric and can be fitted into housing grooves that conform to ISO 7425-1 standards. AF-519 is wider than AF-511/512, which allows for a tighter fit in the housing groove, limiting its axial movement and preventing damage under micro movement high-frequency movement. Additionally, the design eliminates the risk of wear between the O-ring and the seal. To ensure that the O-ring under the seal is immediately activated by system pressure, despite the tighter fit and fast alternation of pressure direction, AF-519 above ø20mm has notches on both sides.

With angled contact faces, the oil film on the surface is transported into the groove in the middle of the contact area, creating an oil reservoir for lubrication instead of being scraped away. This design also allows wear particles to be captured in the groove, preventing them from embedding into the surface where the highest contact force occurs.

Recommended seal material is AF-7615 due to its self-lubricating properties.

Special Features:
The face of the seal is lubricated during linear micro movements.

Low friction.

No stick slip effect.

Single and double acting.