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MECHANICAL SEAL 1 3/4"(1.750"). CSSN MODEL; MCA: AESSEAL •,, ROTARY SEAT IN TUNGSTEN CARBIDE •,, STATIONARY FACE IN CARBON •,, O'RINGS IN VITON MATERIAL •,, SPRINGS HIDDEN FROM THE PROCESS FLUID IN HASTELLOY C •,, FLANGE GASKET IN GRAPHITE TEFLON • ,,METALLIC PARTS IN STAINLESS STEEL. 316