Merits, Demerits and Installation Tips of Globe Valve

Merits, demerits and installation tips of globe valve are introduced in details in this technical article.

Globe valve has the following merits:
1. Globe valve has simple structure, therefore it is easy to be manufactured and maintained.
2. The working stroke of globe valve is small and its opening and closing time is short.
3. The sealing performance of globe valve is very good. The frictional force between sealing surface is small and the service life of globe valve is long.

Globe valve has the following demerits:
1. The fluid resistance of globe valve is big, therefore, it requires larger force when it is opened and closed. 
2. Globe valve is not applicable to coking medium with larger particles and viscosity.
3. Globe valve has poor regulation performance.

According to the position of the valve stem thread, the category of globe valve has the following kinds: external thread type globe valve and internal thread type globe valve. According to the flow direction of medium, globe valve can be classified into the following kinds: straight-through globe valve, once-through globe valve and angle type globe valve. According to the sealing form, globe valve has packing seal globe valve and bellows seal globe valve.

The following aspects should be paid attention to when globe valve is installed and maintained.
1. Globe valve with hand wheel and operated by handle can be installed in any position.
2. The hand wheel and handle do not allow for lifting.
3. The flow direction of medium should be consistent with the direction of arrow showed in the valve body.