Introduction of Globe Valve
Globe Valve Types and Parts: The Globe valve is another very important and useful type of valve. It is known as a globe valve due to its spherical shape but nowadays it has lost its spherical shape but still due to the same internal parts we call it a globe valve. The globe contains a seat and plug arrangement. It is used to start, stop, and also to regulate the flow of fluid. Due to its perpendicular flow path of fluid, it is very good at throttling also. It provides less leakage problem than the Gate valve. The globe valve gives a very high pressure drop due to the perpendicular flow pattern as you can see in the figure below.
Globe Valve Parts
Globe valve contains many different parts like bonnet, body, stem, seat, plug, etc. Let’s discuss all of them.
- The body is the primary pressure boundary of the valve. It keeps all the internal parts together inside it. It is connected with a bonnet.
- The bonnet is connected with the body through bolts or screwed. It is a secondary pressure boundary. The stem moves vertically inside the bonnet and opens and closes the valve. It contains packing to eliminate leaking.
- The plug is the element that throttles the flow of fluid. It is connected with the stem and opens and closes by stem movement. In the close condition, it fits on the seat and stops the flow of fluid.
- The stem is the connector between the actuator and plug. By rotating the actuator we can open and close the valve by plug movement.
- The seat is the part of the valve where the plug fits and stops the flow of fluid.
Applications of Globe Valve
It is used in many different industries and applications like
- the cooling water system
- Fuel oil system
- Feedwater system
- Chemical feeding system
- Turbinelube oil system
