... , resulting in lower long-term operating costs.Control valve features:1.Using the balancing valve core structure , little axial unbalanced force, ... 30%,5.Actuator adopt spring structure ,highly reduced by 30%,weight reduced by 30%.Bellows seal regulator valve, mobile stem formed ... 1Leakage levelHard-sealing IV level, Soft-sealing VIFlange sizeConform with JB/79.1(2)-94,HG20592-97,GB,ANSI,JIS ...