流量系数（Cv）:DN1520253240506580100125150200250300350400500Cv12.546.591625366410014025040057078010201500五、上明牌Y43高压减压阀外形尺寸（PN1.6-4.0）：公称通径DN外形尺寸LHHl1.6/2.5MPa4.0MPa15160180295902016018033098251802003301103220022033011040220240345125502502703451256528030035013080310330385160100350380385170125400450400200150450500415210200500550475240250650525290300800580335350850620375400900660405450900730455500950750465磁翻板液位计电动调节阀电动球阀)