Reliable Quality

Piston seal / DWT

Product introduction:


The DWT Seal is a high-pressure heavy-duty piston seal with excellent leakage control and superior extrusion and

wear resistance.

The DWT seal is a combination of a PTFE based slipper seal energised by an elastomer profile ring and completed

with two Back-up rings (Nylon/POM). It is manufactured with a predefined interference fit, which together with the

squeeze of the elastomer part ensures a good sealing effect even at low system pressure. At higher pressures the

elastomer part is energised by the system pressure and consequently activates the slipper seal in the radial direction.

The Back-up rings prevent the slipper seal from extrusion and ensure a long service life even under harsh conditions

  • - Simple groove design
  • - No stick-slip effect when starting for smooth operation
  • - Minimum static and dynamic coefficient of friction
  • - Minimum static and dynamic coefficient of friction
  • - Due to larger extrusion gap, safe use even with soiled media
  • - Long service life
Operation condition:

Pressure:          Up to 40 MPa

                        Peak pressure up to 60Mpa

Velocity:          Up to 1.5 m/s

Temperature:  -45°C to +135°C