The globe valves are linear motion types of valves. They are mainly used in both throttling and on-off operations. In these valves, the fluid flow through the valves will follow an S-path. Because of this, the direction of the flow will change twice, and as a result, the high pressure will drop.
Because they offer several benefits, the globe valves are typically used in operations where pressure drop through the valves is not a significant factor.
Globe valves are not commonly used when the sizes are more than NPS 12 (DN300) as massive forces are released on the stem to open and close the valves under liquid pressures.
These valves need high pressures on the seat so they can remain sealed when the liquid releases pressure from the base part of the disc.
They are commonly used for both throttling and on-off operations, but special kinds of trims are needed for throttling operations wherein massive pressure drops are engaged.
The globe valves can be used in several arrangements, depending on the type of operation. These can be:
- Wye Pattern
- Tee Pattern
- Angle Pattern