Rod Seals

443 (dynamic, ventilated glide ring, single acting)

AF-443 has a rectangular glide ring section and is provided with a stepped sealing edge on the pressure side. On the opposite side, the profile travels under a flat wedge/angle. This special form of sealing profile helps to achieve a recovery effect. This means that the persistent oil film present on the cylinder wall during motion is conveyed back to the surge chamber. The addition of a chamfer on the O-ring contact surface reduces the strain on the O-ring.

Same groove design as AF-441/AF-446
Two-part composition, consisting of a dynamic glide ring and an O-ring.



  • Ventilation port ensures that pressure is not built up between seals, which increases the life of secondary seal
  • Very good static and dynamic sealing effect
  • Excellent resistance to extrusion
  • Same groove design as AF-441/447
  • More stable and better performance then AF-441
  • No stick-slip effect



  • Operation pressure: Up to 40MPa (400 bar)
  • Velocity: Reciprocating up to 15 m/s
  • Temperature: -40°C to 200°C