... Valve 1.adopts pressure balanced structure 2.equipped with inlet balance sealing ring Electric Control ValveTrim,temperature range & allowable ... leakage of seat Flow characteristicsEqual percentage, LinearTrim material304, 316, 316L, Hastelloy B-2, ... 1981, JB/T79.1-94(PN1.6MPa), JB/T79.2-94(PN4.0, 6.4MPa)Body materialWCB, CF8, CF8MUpper ...