The Richter Sight Glasses Series : SGS, Cylindrical sight glas, 2-Way .Design : ISO or ISO and flanges drilled according to ASME/ ANSI .Housing material : Ductile cast iron EN-JS 1049 .Lining material : PFA .Nominal size : DN 15 - 100 / 1/ 2 " - 4 " .Nominal pressure : PN 6 .Flange : ISO 7005-2 Type B .Face to face ( mm) : 130 to 350

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