Grade M-58 has received approval from the FDA so that it can be used in food contact applications. The product is designed for use in food mixer seals to provide lower seal friction and longer seal wear life. 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. This products is an electro graphite base 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° and 800° F.
Metallized Carbon Corporation, www.metcar.com