Exterior structure: lugged, plum, roundNominal diameter: DN50-DN1200Nominal pressure: GB, ANSI, JIS, DIN, BSMaterial: cast steel, stainless steel Disc:2Cr13, 201, 304, 316, 316LConnection: flange, waferSeat ring :EPDM?hard alloySealing filler: PTFEMedia: swage, power, paper pulp, ore pulp, sugarIn...