301K 系列是一种直通球阀，其球体只需绕轴 1/4 圈，就能实现全开至全闭或全闭至全开动作。

该球阀具有极优的切断性能，当全开时，其流路和管路内径基本相同，流体压力损失极小，因此最适 合于各种液体、气体、料浆类等液体的切断控制。

This 301K series provides ball vavles with a special inner valve which can be fully opened or closed by simply causing the stem to make a 1/4 turn. 

The offtake from a ball valve, when totally opened, has the same bore as the pipeline and its fliud resistance is negligible. For this reason, this automatic valve is best suited to on-off service, controlling various types of liquid, gas and slurry.