Globe Valves: What Are They and How Do They Work?

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Globe Valves: What Are They and How Do They Work?

Globe valves belong to the family of industrial valves, and they are commonly used in high-pressure steam pipelines, as well as natural gas and petroleum pipelines. They are preferred in applications that require throttling control, such as in heat exchangers and cooling towers.

Here's what you need to know about globe valvesglobe valves:

1. What Are Globe Valves?

Globe valves are characterized by a globular-shaped body which encloses a moving metallic disc, positioned horizontally and perpendicular to the flow of the fluid. The disc, which is attached to a stem, is housed in a seat that significantly restricts the flow of fluid when closed. The stem is operated by a handwheel or actuator, which drives the disc up and down to control the flow of fluid through the valve.

2. How Do They Work?

As mentioned, the disc is housed in a seat, which forms part of the valve body. The seat is usually contoured in a V shape, ensuring the disc fits snugly into it. When the valve is in the "closed" position, the disc is pressed tightly against the seat, thus preventing the flow of fluid.

When the valve is partially opened, the disc is lifted slightly off the seat, allowing a small amount of fluid to pass through. As the stem moves up, the gap between the disc and seat increases, allowing more fluid through. Opening the valve further increases the gap between the two, consequently permitting a larger amount of fluid to flow.

3. What Are the Advantages of Using Globe Valves?

Some of the advantages of using globe valves include:

- Excellent throttling capabilities, which makes them suitable for use in applications that require precise control of fluid flow rates. .

- Low pressure drops, compared to other valve types.

- They are versatile and can accommodate a range of fluids, temperatures, and pressures.

- They are relatively easy to maintain and are known for their robustness.

4. What Are the Different Types of Globe Valves?

Globe valves come in different designs, which include:

- Straight globe valves, which have linear valve ports and are ideal for applications that require a high degree of flow control.

- Angle globe valves, which are suitable for applications that require changes in the flow direction or when space is limited.

- Y-pattern globe valves, which have a Y-shaped valve body and are preferred for applications that require more than just throttling control, but also good shutoff capabilities.

Final Thoughts.

Globe valves are essential in industrial operations, thanks to their versatility, preciseness, and relative ease of maintenance. Whether you're working in a steam pipeline, cooling tower, or handling petroleum products, globe valves provide accurate throttling control and excellent shutoff capabilities, making them an excellent choice for industrial use.

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