According to connection method classification (1) threadedconnection valves: valve with internal thread or external thread, and pipe thread connection.
按连接方法分类(1)螺纹连接阀门:阀体带有内螺纹或外螺纹,与管道螺纹连接。
2
In order to facilitate the installation and removal of threadedconnection valves, piping system at the appropriate location can be used on pipe joints.