Pneumatic seal K57 40x8x11,8

Ring K57-40x8x11,8 is a pneumatic piston seal with end-of-stroke cushioning, made of nitrile rubber (NBR). The K57 profile combines a dynamic seal and a cushioning valve for pneumatic cylinders in one element. The sealing lip has an optimised geometry for smooth, low-friction operation, and the face of the ring has specially shaped flow channels. When the piston reaches its end position, the element enters the cushioning seat, closes the main outlet and forms an air cushion. On the return stroke the profile works as a check valve, so the cylinder starts quickly. Technical data and dimensions: Inner diameter (d): 8,0 mm Outer diameter (D): 40,0 mm Height / thickness (H / h): 11,8 mm In inches: 0.315" × 1.575" × 0.465" Material: NBR (nitrile rubber) Profile type: K57 Application: pneumatic cylinders with cushioning Medium: compressed air (lubricated or dry)