GB/T586-1999船用法兰铸钢止回阀A型GB/T586-1999船用法兰铸钢止回阀性能规范TechnicalData公称压力NominalPressure(MPa)公称通径NominalDiameter(mm)适用介质ApplicableMedium1.065～125淡水、滑油、燃油和t≤300℃蒸汽Freshwater,Lubricantingoil,Fueloil,t≤300℃steam.1.620～1252.520～100GB/T586-1999船用法兰铸钢止回阀A型船用法兰铸钢止回阀主要零部件材质MaterialsofMainParts零件名称PartsName材料Material名称Name阀体、阀盖Body/Cover铸钢CastSteelZG230-450阀盘Disc优质碳素钢High-qualityCarbonSteel钢25阀盘密封圈DiscSealring焊不锈钢WeldStainlessSteelH2Cr13阀体密封圈BodySealringPN≤2.5焊不锈钢WeldStainlessSteelH1Cr18N19TiPN≥4.O焊不锈钢WeldStainlessSteelH2Cr13)