产品简介 Product Introduction 本产品适用于液体,气体介质管路, 做为接通和断流之用。尤 其适用于双向流通管路,直通管道。流阻小, 启闭较省力,不易 产生水锤现象。易于安装。适用于受限空间。手轮顺时针为关, 反之为开,不允许借助任何杠杆。 The product can be used for throwing and shutting off flow in pipeline of liquids,gas medium,especially for such pipe l i n e as two-way flow and straight way flow,with the characteristics of small flow resistance,smaller operation torque,easy opening and cl