Plastic casings are molded and precision machined from high performance polymers as PTFE, filled PTFE composites, and other thermoplastics. They are in contact with the surface to seal and define the leak rate. They are designed to be a subtle engineer balance of surface conformation to control the leak path and strength to minimize the extrusion through the sealing gap. In dynamic application, their tribology performances is defining the life of the seal.
|Round ribbon spring|
During the seal installation, the spring is placed under compression, forcing the casing lips against the surface to seal creating a leak tight seal. The spring provides permanent resilience to the seal jacket and compensates for material wear and hardware misalignment or eccentricity. Assisted with the system pressure, the spring loading system provides effective sealing in both low and high pressure operating environment.
|Temperature range:||-250 to +250 °C|
|Pressure:||UHV to 100 MPa|
|Max Speed:||1 m/s|
|Clamping load:||5 N/mm|
The given value is the clamping force required to spring load the seal at its standard interference by compression, excluding external media contribution.
|Diameter:||10 to 3000 mm||6 to 3000 mm|
|Cross Section:||1.4 to 12.7 mm|
|Min. Tolerances:||+/- 20 μm|
The given value is the minimum tolerance reachable on diameter and cross section based on seal design < 10 mm in outer diameter. Other value are available on demand for any larger seals dimension.