译文：
硬渣、污物或任何外部物质在管道内积累都可能妨碍旋塞阀的工作效率并严重损坏阀门的关键部件。必须用空气或蒸气对管道内部进行彻底清洗。 当对管道进行攻丝时，要测定管道螺纹的尺寸和长度，避免将管道塞满阀座和阀瓣。 彻底清洗螺纹末端，xx任何有害的钢或铁沉淀物。如果要时焊接更牢固，就要使用特氟隆带或管道粘接剂。在管道螺纹上只能少量使用管道粘接剂，但是在阀门螺纹上{jd1}不能使用管道粘接剂。不要让任何管道粘接剂流入阀体内，以避免损坏阀瓣和阀座。 安装前，切断通过旋塞阀的流体，以使旋塞阀工作正常。安装前要xx关闭旋塞阀门。将扳手套在靠近管道的六角螺栓头上避免可能产生的变形。安装旋塞阀后，要支撑住管道：下垂的管道会使旋塞阀产生变形而导致失败。

“ Plug Valve fittings ”是由提供的国际阀门新闻，译文仅供参考。另外，中国旋塞阀网还提供相关产品搜索：、、、、等。

原文：
Hard residue, dirt, or any external material accumulated in the pipeline may hinder the efficiency of the plug valves, and severe damage to key components of the valve. Air or steam must be thoroughly cleaned inside the pipeline. When tapping on the pipes when the pipe thread to determine the size and length, to avoid pipe filled with the valve seat and valve flap. Thread the end of a thorough cleaning to remove any harmful steel or iron sediments. If you want a more solid when the welding, it is necessary to use Teflon tape or pipe adhesive. Thread in the pipeline can only be a small amount of adhesive to use pipes, but absolutely can not use the valve threaded pipe adhesive. Do not let any pipe into the valve body adhesive in order to avoid damage to valve and valve seat. Before installing, cut off the fluid through the stopcock in order to plug valves working correctly. Plug valves to completely shut down before installing the door. Will be near the pipe wrench sets hex bolt heads to avoid the possible distortion. After the installation of plug valves, in order to support live pipeline: the pipeline would plug valves sag deformation which lead to failure.