该系列适用于中试装置或试验室等微小流量的控制。

低于 501T 系列制造范围的阀芯尺寸为本系列的制造范围。标准阀芯分为针形和 V 型。

This series is suitable to service controlling very low flow as in pilot plant and/or laboratories , etc. 

Plug size under the manufacturing range of 501T is covered by this series. The standard plug include Needle-Type and V-Type.