Globe valve, also known as the cut-off valve,which is different from gate valve.Cast Iron Ball Valve is also common to see. Globe valve is a forced-sealed valve, so the valve is closed, the pressure must put pressure on the valve flap to force the sealing surface does not leak. When the medium from below the valve into the valve, the operating force needed to overcome the resistance that is the valve stem and packing friction and the thrust generated by the media pressure, off the valve force than the valve open, so the valve stem The diameter should be larger, otherwise it will happen valve stem bend.