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Cover Seals | Merkel Grafiflex® Cover SealMerkel Grafiflex® Cover SealMerkel Grafiflex ® Cover SealProduct descriptionMerkel Grafiflex cover seals aresupplied as pre-pressed <strong>ring</strong>s and areproven in self-sealing covers, e.g. inlarge valves and in high-pressure waterpre-heaters.Operating conditionsOperating pressure Temperature pH value1000 bar1)the majority of media and air–200 … +550 °C 1) 0 … 14–200 … +700 °C 2)–200 … +2500 °C 3)2)steamProduct advantagesMerkel Grafiflex stays elastic even withcontinually varying temperature andpressure up to 200 N/mm 2 surface pressure.It correctly bridges gap widths onlarge, self-sealing covers up 0,3 mm.Larger gaps are controlled byMerkel Grafiflex using sp<strong>ring</strong>s madeof material 1.4571 integrated into thecorners of the packing <strong>ring</strong>s by pressing.Application3)inert gasMediaHot water, feed water, steam, heat transfer oil, hydro-carbons and many other media.Exceptions: strongly oxidising media.6581 6501 6521 6522 6523D DB Bs sValves.s sØ D B S (centr.)350 20 0,8350 >20 1,2>350 20 0,8>350 25 1,2>350 >25 1,5Fig. 1138© Freudenberg <strong>Simrit</strong> GmbH & Co. KG | O-Rings and Static Seals Catalog <strong>2007</strong>
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