Electric Flow Control Valve 1.adopts pressure balanced structure 2.equipped with ... ring Electric Control ValveTrim,temperature range & allowable leakage of seat Flow characteristicsEqual percentage, LinearTrim material304, 316, 316L, Hastelloy B-2, Hastelloy ... the allowable range of each material.Gland typeCompact with boltPackingPTFE V-ring, PTFE-Asbestos, Graphite