The
grooved stainless steel core [1.4571, pitch 1,0 mm] is covered on
both sides with soft material layers made from PTFE [unsintered]
and provided with a loose centering ring [non-integral, half-shells,
spot-welded], which prevents vibration breaks in the sealing area.
Grooved gaskets require low minimum sealing surface pressure, but can
also resist very high loads.
Grooved gaskets impress by a high
pressure application limit, low leakage rate and are therefore suitable
for extreme operation conditions.