Globe Valves

Globe valves are named for their globular body shape. Globe valves consist of the following moving parts – the disk, the valve stem, and the hand wheel. The stem connects the hand wheel and the disk. It is threaded and fits into the threads in the valve bonnet.  The location of the valve disk in relation to the valve seat allows or restricts flow.  The direction of fluid flow through the valve changes several times, which increases the pressure drop across the valve. In most cases, globe valves are installed with the stem vertical and the higher-pressure fluid stream connected to the pipe side above the disk, which helps to maintain a tight seal when the valve is fully closed. All contact between seat and disc ends when flow begins. These are advantages for more efficient throttling of flow, with minimum wire drawing and seat erosion.

Shorter disk travel - with fewer turns required to operate globe valves saves considerable time and work, also wear on valve parts.

Globe valve inlet and outlet openings are arranged in several ways: 

Recommended Uses:
1.  Throttling service/flow regulation
2.  Frequent operation

Applications:  Liquids, vapors, gases, corrosive substances, slurries

Advantages:                         Disadvantages:
1.  Efficient throttling               1.   High pressure drop
2.  Accurate flow control         2.  More expensive than other valves
3.  Available in multiple ports

 

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