A sealing device used as a "buffer" to reduce the
impact of pressure spikes on the primary seal and consisting of an
elastomeric energizer and a PTFE blend step shaped ring.
A sealing device used as a "buffer" to reduce the
impact of pressure spikes on the primary seal and consisting of a
lip type seal designed to relieve pressure and an integral rigid
back-up ring.
A sealing device used as a "buffer" to reduce the
impact of pressure spikes on the primary seal and consisting of
rigid plastic and elastomeric components in a "self relieving"
design
