The BX Ring Gasket differs from the standard RX, Oval or Octagonal shape since it is square in cross section and tapers in each corner. BX is used at pressures up to 20,000 PSI. The BX Gaskets will have pressure relief hole at mid portion of C. The sealing surfaces on the Ring Joint Gasket and Flange Grooves must be smoothly finished to 32 micro inches and to be free of objectionable ridges, tool or chatter marks.
