Double Flange Dual Plate Swing Check ValveStructural FeatureShort structural length,only 1/4~1/8 of that of traditional flanged check valve;Low volume,light weight,only 1/4~1/20 of those of traditional flanged check valve;Quick valve disc closedown,low water hammer pressure;Applicable for and easily installed for vertical or horizontal pipelines;Smooth flow passageway and small fluid resistance;Flexible action and good sealing performance;Narrow valve travel and small closedown impact;Integrated structure,simple and compact,in beautiful shape;Long service life and good reliability.Main Parameter SpecificationDesign and manufacture:API594,API 6D,JB/TB8937;Face to face and end to end:API594,API6D,DIN3202,JB/T8937;Pressure-temperature rating:ASME B16.34,DIN2410,GB/T9124,HG20625,SH3406,JB/T74;Inspection and test: API598,JB/T9092;Pipe flange: JB/T74~90,JB/T9112-9124, HG20592~20635, SH3406, ASME B16.5, DIN2543~2548, GB/T13402, API605, ASME B16.47. Product RangeBody material: carbon steel, stainless steel, alloy steel,bronzeNominal diameter:1.5"~48"(DN40~DN1200)End Connection: RF,RTJ, BWPressure range: Class150~2500(PN16~PN420)Working temperature:-196℃~+560℃