MetcarMetallized Carbon Corporation’s Metcar Grade M-58 seal ring material has received approval from the FDA for use in food contact applications. This will permit the use of Metcar Grade M-58 seal rings in dry-running, food mixer seals to provide lower seal friction and longer seal ring life. For pharmaceutical applications, there are several Metcar grades that have passed the tests required for U.S. Pharmacopeia Class VI approved seal rings. Dry running mechanical seals are used on large, vertical mixers to seal the clearance between the agitator shaft and the mixer housing at the location where the shaft enters the top of the mixer. Primary seal ring wear life has been a problem with these mechanical seals because they must run dry with high shaft run-out. Metcar grade M-58 is an electro graphite base seal ring material that contains a special additive to reduce friction and improve the dry running wear rate. Available fully machined to the customer’s drawing specifications, Metcar Grade M-58 primary seal rings can be used in temperatures between -30 F and 800 F. It is anticipated that Metcar Grade M-58 will also be useful in many other machine part applications where an FDA-approved, self-lubricating material, with low friction and long wear life is required.