... ,ss316,ss31803 316L with inner ring and outring graphite tape,PTFE tape spiral wound gaskets semi-metallic ... of V-shaped metallic stripe and soft non-metallic filler by means of piled, spiral wound and connected its ... 316(L)321;317L31803Monel,Ti,NiINCHast.C/BZr702 etc. Graphite, PTFE,AsbestosNon-asbMica,etcCS,304(L), 316(L),321 ... inner & outer rings Spiral Wound Gasket with graphite inner and out ring