The R Type ring gasket can be ordered to two different profiles,
oval or octagonal in cross-sections. Both types have identical
pitch diameter as the flange groove they correspond to. These
gaskets are used in pressures up to *0,**0 PSI. The octagonal type
has a higher sealing coeffient than the oval, therefore being the
better gasket of the two. The oval type is the only gasket that
will fit a bottom radiused groove. Flanges with flat bottom
v-grooves will accept either style. Gaskets that have been torqued
initiating a metal-to-metal seal should be discarded and not
reused.
The RX Type ring gasket is a pressure-activated gasket. Its shape
is designed to use the fluid pressure to increase the sealability.
The outside sealing surface of the gasket makes the initial contact
with the flange seating the gasket. As the internal pressure of the
piping or equipment is increased, the contact pressure between
gasket and flange also increases. High seating pressures are
created increasing the sealability. This design characteristic
makes this gasket style more resistant to vibrations, pressure
surges and shocks that occur during oil well drilling. Style RX is
interchangeable with oval and octagonal ring gaskets, using the
same flange, if the flange groove is flat bottom.
