PROTEK RANGER

Type E is a full-face isolation gasket, matching the flange outside diameter and incorporating accurately machined bolt holes. This configuration promotes positive gasket alignment during installation and helps prevent conductive debris from bridging across the flange faces. Type E gaskets are supplied in plain phenolic or Nitrile-coated phenolic, as well as various high-temperature formulations, with a typical nominal thickness of 1/8 in. 

Type F isolation gaskets are sized to seal only on the raised-face area of the flange. Because bolt holes are omitted, the gasket outside diameter is slightly smaller than the bolt-circle inside diameter, which automatically centers the gasket during assembly. Type F designs are available in the same material options as Type E and are also commonly furnished in a 1/8 in nominal thickness 

Type D isolation gaskets are engineered to locate directly within the ring groove of ring-type-joint flanges. They are produced from a medium-weave, fabric-reinforced phenolic laminate and dimensioned to ANSI standards, with options for both oval and octagonal configurations. High-pressure BX-style versions are also offered with working pressures up to 15,000 psi.