該系列為高壓頂部導向型單座調節(jié)閥，與 501G 系列相比，由于采用不平衡型閥芯，需要較大的執(zhí)行機構輸出力。但是，與精小型設計的多彈簧薄膜式執(zhí)行機構或氣缸式執(zhí)行機構組合后，外形大為縮小。由于沒有采用流體壓力平衡型結構，該系列調節(jié)閥特別適用于料漿、聚合物、結晶體及高溫流體。
This series is High-Pressure top guided single seated globe valves. Compared with 501G series valves, It needs more output actuator for adopting unbalance plug. But, Assembling with Multi-spring pneumatic actuators or cylinder actuators its size decrease a lot. With unbalance plug type trims, These valves is especially suited for oar, polymer, slurry materials or high temperature fluids.
