... availability, resulting in lower long-term operating costs.Control valve features:1.Using the balancing valve core structure , little axial unbalanced force, large ... 50:1, the rated flow coefficient increases by 30%,5.Actuator adopt spring structure ,highly reduced by 30%,weight reduced ... levelHard-sealing IV level, Soft-sealing VIFlange sizeConform with JB/79.1(2)-94,HG20592-97,GB,ANSI,JIS,DIN etc. ...