Klinger PTFE envelope gaskets are available in 3 different style as below.
Slit Type – 0-500 mm
U-Type – 0-500 mm
Welded Type – 500 to 3000 mm
The slit type is the most economic to produce but can suffer from splitting at the V under load and through erosion.
The U type is machined to suit the thickness of the filler. Although more expensive than the V type it does not split under load and therefore a longer service life can be expected.
The Welded type configuration is used to manufacture PTFE envelopes where it is not possible to machine the gaskets in one piece.