Aston KDA Type

The piston seal type Aston Seals KDA is mainly used with high pressure and the backup ring offsets large gaps or structural deflections without extrusion.

The asymmetric lips are designed to differentiate the behaviour of the lips on the static and dynamic surfaces: the static lip is flexible, more sensitive to pressure fluctuations and it guarantees a wide contact area; the dynamic lip is shorter and stronger to concentrate load against the dynamic surface.

They can also be used in back-to-back arrangement for double acting piston.

• Very high resistance against extrusion (backup ring)
• Insensitive to structural deflections
• Extended service life
• Simple groove design
• Excellent wear-resistance
• Good temperature resistance
• Easy installation without expensive auxiliaries