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A globe valve, different from ball valve, is a type of valve used for regulating flow in a pipeline, consisting of a movable disk-type element and a stationary ring seat in a generally spherical body. Globe valves are named for their spherical body shape with the two halves of the ''body'' being separated by an internal baffle. This has an opening that forms a ''seat'' onto which a movable ''plug''〔(Process Instrumentation (Lecture 8): Control valves )〕 can be screwed in to close (or shut) the valve. The plug is also called a ''disc'' or ''disk''.〔http://www.answers.com/topic/globe-valve under heading "McGraw-Hill Professional – Architecture" diagram shows disc〕〔(Globe Valve Disks )〕 In globe valves, the plug is connected to a ''stem'' which is operated by screw action using a handwheel in manual valves. Typically, automated globe valves use smooth stems rather than threaded and are opened and closed by an actuator assembly. ==Information== Although globe valves in the past had the spherical bodies which gave them their name, many modern globe valves do not have much of a spherical shape. However, the term ''globe valve'' is still often used for valves that have such an internal mechanism. In plumbing, valves with such a mechanism are also often called stop valves since they don't have the global appearance, but the term ''stop valve'' may refer to valves which are used to stop flow even when they have other mechanisms or designs. Globe valves are used for applications requiring throttling and frequent operation. For example, globe valves or valves with a similar mechanism may be used as sampling valves, which are normally when liquid samples are being taken. Since the baffle restricts flow, they are not recommended where full, unobstructed flow is required. Globe valves are always reverse seated. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「globe valve」の詳細全文を読む スポンサード リンク
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