... many work situation up to scratch 6 leak standard ,soft sealing structure valve core up to ... ,highly reduced by 30%,weight reduced by 30%.Bellows seal regulator valve, mobile stem formed completely sealed , ... 1(2)-94,HG20592-97,GB,ANSI,JIS,DIN etc. standardBody materialWCB,304,316,WC6,WC9, ... .)Series typeNormal TEM, middle TEM, low TEM, bellows sealing type, jacket insulation type, shut-off control ...