(1) Threaded valve: with internal or external thread, and the thread connecting pipes ..
(2) Flanged valves: a valve body with a flange connected to the pipe flange.
(3) welding connection valve: Body with welding groove connected to pipe welding.
(4) clamp connection valve: Body with jaws, pipe clamp connection.
(5) connected to the valve sleeve: the pipes are connected to the ferrule.
(6) of the clip connection valve: bolts directly to the valve and two pipes connected together in the form of wear clip.