The principle of the globe valve is to use the torsion of the valve stem to give the sealing surface a downward pressure, and rely on the pressure of the valve rod to make the valve disc sealing surface fit closely with the valve seat sealing surface to prevent the inflow of the medium or to adjust the flow rate of the medium. The opening and closing part of the globe valve is a cylindrical valve disc, the sealing surface is a plane or a cone, and the valve disc moves linearly along the center line of the fluid. The movement of the valve stem includes a lifting stem type (the valve stem rises and falls, and the handwheel does not rise and fall), and a lifting and rotating stem type (the handwheel rotates and rises and falls with the valve stem, and the nut is set on the valve body). The globe valve is a forced sealing valve, so when the valve is closed, pressure must be applied to the valve disc to force the sealing surface to prevent leakage.The globe valve, also called the shut-off valve, is the most widely used valve, mainly composed of a valve body, a valve disc, a valve bonnet, a valve stem, etc. The valve body and valve bonnet are pressure-bearing parts, and the valve disc and valve stem are internal parts. The globe valve is a valve in which the closing part (valve disc) moves along the center line of the valve seat. According to this movement of the valve disc, the change of the valve seat opening is directly proportional to the valve disc stroke.
