What are the selection methods of shut-off valves?
What are the selection methods of shut-off valves?The shut-off valve refers to the valve whose closing part (disc) moves along the center line of the valve seat. According to this movement form of the valve disc, the change of the valve seat port is proportional to the valve disc stroke. The opening or closing stroke of the valve stem of the shut-off valve is relatively short, and it has a very reliable shut-off function.