500A 該系列為高壓頂部導向型單座角閥，與 501G 系列相比，由于采用不平衡型閥芯，需要較大的執行機構輸出力。但是，與精小型設計的多彈簧薄膜式執行機構組合后，外形大為縮小。由于沒有采用流體壓力平衡型結構，該系列調節閥特別適用于料漿、聚合物、結晶體及高溫流體。

500A series is High-Pressure top guided single seated angle valves. Compared with 501G series valves, It needs more output actuator for adopting unbalance plug. But, Assembling with Multi-spring pneumatic 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.

510A 高壓多段式閥芯型角閥適合于在極其苛刻的工況條件下對高溫、高壓或高壓差液體的精確控制。能防止液體產生空化氣蝕、減少高速流體對閥內件的沖刷、降低噪音；尤其適合于對含有雜質或固體顆粒流體的控制。由于具有使作用在閥芯上的流體壓力平衡的結構，因此只須用較小的操作力便可達到穩定調節，能夠承受較高的工作壓差。

510A High-pressure multi-step plug angle valves provide smooth and accurate capacity control of high pressure drop liquids without cavitation , erosion, vibration and high noise levels compare with single seated valves. It is particulary suited for appications invovling fluids with entrained particles. This series is characterized by pressure balanced type trim for very high pressure drops.