... industry chemical, metallurgy, environment protection, light industry, teaching and scientific research areas.Specifications:1) Style: Through inverse ... Bolt Compression style9) Packing: V-pattern PTFE, soft graphite, stainless and mellows10) Core Style: Upper guide single seat ... sleeve ram core11) Flow characteristics: Equal percentage, linearity and quick opening12) Actuator A) PS series, 3810, ZAZ ...