... soft sealing structure valve core up to scratch 5 leak standard.The body fluid mechanics theory designed ... 544691101762754406301000160021562816Equal percentage6.31016254063100160250400690900144019602560Nominal Pressure(Mpa)1.6,2.5,4.0,6.4,10Travel (mm)16254060100130Diaphragm ... -percentage,Quick-openInherent rangeability50:1Leakage levelHard-sealing 5,4 level,Soft-sealing 6Flange sizeConform with JB/79. ...