Metallized Carbon Corporation

RADIAL SEAL RINGS

Radial seal ring assemblies are used to seal the clearance between a rotating or reciprocating shaft and the stationary housing on many types of machines.

Carbon/graphite radial seal assemblies were developed to help solve serious wear, thermal degradation, chemical attack, and dimensional stability problems that occur when materials such as leather, plastic, composite, or elastomers are utilized in the stuffing box seals installed on industrial blowers, pumps, and other turbo machinery.

To accommodate some anticipated movement in a reciprocating or rotating shaft such as thermal expansion or runout, carbon/graphite radial seal rings are normally designed to float with OD clearance within a chamber in the stuffing box. This allows a close clearance seal to be maintained between the OD of the shaft and the ID of the carbon/graphite seal ring. Leakage around the OD of the carbon/graphite seal ring is minimized by using a close clearance between the width of the carbon/graphite seal ring and the width of the metallic seal housing cavity.