Unlike a standard Y seal where both sides of the seal have the same dimensions, the asymmetrical unloaded Y seal is designed to have both a static and a dynamic side. The static side features a tall lip in order to increase the stability of the seal. On the dynamic side, the prominent feature is a reduced height seal lip, with good film breaking capabilities.

　　The asymmetrical Y seal is a single direction piston seal, meaning it can only seal if the pressure is coming from one direction. Since the sealing method is single directional, two loaded Y seals must be installed for dual direction hydraulic piston applications.

　　Applications: Medium Duty Applications such as Mobile Hydraulic; Agricultural; General Industrial