Figure 1: Kammprofile gasket without covering layer
Kammprofile (so called Camprofile) gaskets are a solid metal ring having a concentric serrated tooth form profile on each side (see Figure 1). A covering layer of graphite, Sigraflex APX2 graphite, PTFE or Flexitallic Thermiculite is applied which becomes compressed into the serrated surface when the gasket is loaded. These gaskets have a good level of sealing tightness combined with the potential benefit of low seating stress and are frequently used to replace Spiral Wound Gasket (SWG) on certain applications, or Metal Jacketed joints on heat exchangers.
A number of metal core profiles are available (see Figure 2). Kammprofile gasket is nowadays preferred in many applications where there are wide temperature and pressure fluctuations.