Globe valve refers to a valve in which the closing member (disc) moves along the centerline of the valve seat. According to this moving form of the valve disc, the change of the valve seat port is proportional to the valve disc stroke. Because the valve stem of this type of valve has a relatively short opening or closing stroke, and has a very reliable cut-off function, and because the change of the valve seat port is proportional to the stroke of the valve disc, it is very suitable for flow regulation. Therefore, this type of valve is very adaptable for shut-off or regulation as well as throttling. Advantages of globe valve: in the process of opening and closing, the friction between the disc and the sealing surface of the valve body is smaller than that of the gate valve, so it is wear-resistant; the opening height is generally only 1/4 of the valve seat channel, so it is smaller than the gate valve. Usually there is only one sealing surface on the valve body and valve disc, so the manufacturing process is better and it is easy to maintain; because the filler is generally a mixture of asbestos and graphite, the temperature resistance level is higher. General steam valves use globe valves. Disadvantages of globe valves: Due to the change in the flow direction of the medium through the valve, the minimum flow resistance of the globe valve is also higher than that of most other types of valves; due to the longer stroke, the opening speed is slower than that of the ball valve.
