Type F "Raised Face" gaskets will fit only on the raised face surface of the flanges. The outside diameter of an F style gasket is slightly less than the inside diameter of the bolt circle. F type gaskets can be used on both raised face and full face flanges. It is recommended that the flanges be wrapped with Flange Band Protectors available from Drake Specialties or a similar device to prevent foreign material from collecting and creating a bridge, thus shorting out the cathodic insulatoin. Type F gaskets are available in phenolic, neoprene-faced phenolic, and high temperature materials.
Our Type E "Full Face" Gasket style kit contains a full-face gasket that has the same outside diameter as the flanges. This style of gasket will prevent foreign material from collecting and creating a bridge in the flange which would short out the cathodic insulation. Type E gaskets are available in phenolic, neoprene-faced phenolic and high temperature materials.
RTJ is specifically designed to fit into the ring type joint flange. They are manufactured of a medium weave; fabric reinforced phenolic material and is sized to ANSI specification available in basic oval or octagonal shape.
NEOPRENE FACED PHENOLIC –N Neoprene faced phenolic gaskets have long been used as standard insulating gasket in the gas and oil industries because the soft neoprene rubber provides good sealing qualities.in these gaskets neoprene sheets are factory bonded to both side of laminate phenolic sheet to give good sealing qualities and high electrical resistance. Plain-phenolic Plain phenolic gaskets are manufactured from laminated phenolic material, which provide insulation between the flange faces. They are less expensive than faced gaskets and can be used in temperatures up to 1200C.