Bellows seal globe valves have the ability to create reliable leak-free seals in high-temperature and high-pressure environments.
As a result, they are crucial items in different industries like chemicals and gas for their smooth and safe operation.
Continue reading to learn more about bellows seal globe valves, including their main components and types.
A bellow seal globe valve safely controls and manages the flow of materials like fluids and gases inside a pipeline. It’s because it is an industrial item that uses multiple seals to protect its valve from leaking. An example of its seal is the one around the stem.
This makes them commonly used in industries like oil, gas, and chemical for their operation. These factories’ environments have a higher chance of dangerous leakage and fire due to the toxic materials it handles, which can cause safety concerns.
The bellows seal globe valve is built up of multiple components, including the stem, body, disc, bellows seal, packing and bonnet,. Each of their important functions in the bellow seal globe valve will be further explained below.
This bellows seal globe valve’s part is the main sealing component and the one that is attached to the stem.
The stem lifts the disc from the seat when the valve is open, allowing the material to go through the passage. But when the valve is closed, the disc is pressed against the seat to prevent the material from going through the pipes.
This is the component that is connected to the bellows seal globe valve’s disc actuator, which lets the material go through the pipe or prevents it.
When the handwheel turns, the stem moves the disc up or down, and this lets the valve either open or close.
The bellows seal globe valve body is the main structure that holds all the other components inside to control the materials passing through it.
It is designed to be used in high-temperature and high-pressure environments. One of the reasons is because it is made from durable materials that can often handle up to 2500 psi.
The bonnet protects the valve’s stem and packing from outside environmental factors like dust and moisture, as well as preventing leaking.
This is usually fastened or welded in the valve’s body to maintain its structural integrity and achieve a smooth operation.
This serves as the valve’s extra seal around the stem, which increases its structure’s safety and reliability.
When the bellow seal gets damaged, the packing becomes the additional barrier that blocks the materials inside the pipe from leaking.
Bellow seals are components that are shaped into a set of rounded folds and wrapped around the stem. This is also made from strong materials that can be designed to be flexible and effective seals, such as:
The bellow seal can expand and shrink according to the changes in pressure and temperature in the entire pipe structure. Therefore, it protects the valve stem while it moves and ensures safe operation.
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