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GRAPHITE YARN PACKINGS ML 4444 GRAPHITE PACKING Construction: Multi-Lok Braid Features: The highest quality chemically resistant graphite yarns are twisted together and braided in a Multi-Lok fashion. This packing has as extremely low coefficient of friction. The light weight yarn provides more feet of length per pound than standard non-asbestos or PTFE packings. Graphite is a heat conductor and dissipates heat in the stuff- ing box, permitting higher shaft speeds and less leakage than other packings. Equipment: All rotating and reciprocating shafts, valves and agita- tors. Recommended For: Strong caustics, acids, chemicals and high pres- sure steam. ML 4444 Service Conditions: Temperatures to 1200�F/649�C in steam; 800�F/427�C in oxidizing atmospheres; pH range 0-14; not recom- mended for fuming nitric acid, oleum and fluorine. ML 4500 ULTRA-GRAPHITE PACKING Construction: Multi-Lok Braid Features: Manufactured from pure graphite yarns impregnated with a fine sub micron powder of inorganic graphite. A surface lubricant is applied to prevent wicking and to provide a bearing film between the shaft and the packing material. Equipment: Valves (end rings only with flexible graphite center rings), high speed shafts, agitator shafts, reciprocating rods and plunger rods where minimum leakage is required under severe service conditions. Recommended For: Strong acids and strong caustics throughout the full pH range. ML 4500 is virtually inert. Service Conditions: Not recommended for oleum, fuming nitric acid and fluorine; temperatures to 6000�F/3316�C in non-oxidizing agents, ML 4500 1200�F/649�C in steam; 800�F/427�C in oxidizers. CAN BE NUCLEAR CERTIFIED CARBON YARN PACKINGS ML 4460 CAR-GRAF PACKING Construction: Multi-Lok Braid Features: Car-Graf is a unique combination of amorphous carbon yarns treated throughout with fine particles of graphite. Treatment: Treated throughout with graphite. Equipment: General service on rotary and reciprocating shafts, high temperature valves as end rings. Recommended For: All chemical services in which carbon is suit- able. Service Conditions: Shaft speeds to 4000 FPM; temperatures to 650�F/345�C in oxidizing atmospheres; 1200�F/650�C in steam; pH range 0-14 except in strong oxidizers. ML 4460 9
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