Carbon-graphite material approved for food equipment construction

The National Sanitation Foundation (NSF) has approved Metcar Grade M-133 for use in the construction of commercial food equipment.

Metcar Grade M-133 is a self-lubricating carbon-graphite material, produced by Metallized Carbon Corporation. It is suitable for use in machine applications where rubbing or sliding is required but oil and grease lubricants cannot be used. Typical applications include bearings, face seal rings, radial seal rings, piston rings, valve seats, vanes, rotors, end plates, cylinder liners, slides, runners and scrapers.

Having met the criteria for NSF Standard NSF 51-2012, Metcar Grade M-133 can now be used in the construction of commercial food equipment. Standard 51 establishes requirements intended to ensure that a material is not formulated such that it may impart deleterious substances to food in its intended use. Materials that are approved to NSF Standard 51 must conform to all the NSF 51 food equipment standards which are based on US government standards. Requirements include chemical migration, cleanability and corrosion resistance.