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QT450 DN150 PN10/16 ball type check valve Specifications 1.Production Size:1 1/2”-20” DN40-DN500mm 2.Pressure :PN10,PN16 3.Face to Face:DIN 3202 F6 4.Flange Standard: EN1092-2/BS4504 PN16,ASME B16.1 5...