Globe valves are critical elements in most industrial areas. They are employed in the plumbing, oil, chemical, and other sectors to control the flow of liquids and gasses. But, before you decide to use them for your specific requirement, understanding how globe valve function becomes important. This will help ensure that the valve is working at its best at all times.
This comprehensive guide will discuss the different types of industrial valves, globe valve uses, different types of globe valves, the benefits of globe valve, and maintenance and troubleshooting tips for globe valves.
Globe Valves – Introduction
Globe valves can be used to control and regulate the flow of liquids and gases in industrial applications. The valve has a seat and a stopper with the shape of a disc that can be used to start and stop the flow. It has a spherical hollow body. The valve can be automatically actuated by employing electric or hydraulic devices, but it is typically manipulated manually.
Globe valves offer comparatively better shutoff and flow control capabilities, making them an ideal choice for use in a variety of industrial processes. They are also used to regulate system pressure and prevent sudden pressure fluctuations. These valves are available in a range of sizes and material types and can be used in high-pressure applications.
Globe Valve Function
A glove valve is constructed as a stationary ring seat inside a hollow and spherical globe-shaped body, with a vertically or horizontally traveling disc. The valve seat sits in the middle with its placement parallel to the inlet pipe.
The disc is used to open and close the flow. When the operator turns the handle, the disc travels vertically to reach the valve seat and close the flow. When rotated in the opposite direction, the disc travels upwards and the flow is permitted.
Types of Industrial Valves
The purpose of an industrial valve is to control the flow of substances through a system. Butterfly valves, globe valves, gate valves, check valves, ball valves, diaphragm valves, and other forms of industrial valves are among the many types available. Each of these valves has a range of applications in a number of different sectors.
Here are some common types you can find in the market:
Gate Valves
Gate Valves are used to control the movement of gases and liquids in a system. They are usually manually operated, but can also be operated automatically. They are used to regulate a system’s pressure and prevent sudden changes in pressure.
Ball Valves
Ball valve is normally operated manually and is employed in low-pressure situations. They are used to regulate the flow of the material in the system.
Check Valves
Check valve is also used to regulate the flow of material. These valves can operate both manually and automatically. They are used to prevent the backflow of liquids and gasses and to maintain pressure in a system.
Butterfly Valves
The butterfly valve is another valve that can be used to regulate the flow of liquids and gases. They are usually manually operated, but can also be operated automatically. They are used to regulate the flow of the material in the system, and to regulate the pressure of the system.
Diaphragm Valves
Diaphragm valves are employed to regulate the flow of gases and liquids within a system. They are usually manually operated, but can also be operated automatically. They are used to regulate the flow of the material in the system, and to regulate the pressure of the system.
Globe Valves
Globe valves regulate the flow of gases and liquids inside a system. They can be used both manually or automatically. They are used to regulate the flow of the material in the system, and to regulate the pressure of the system.
Applications based on the function of globe valves
Globe valves are employed in a wide range of industrial settings. They are utilized in plumbing and heating systems, chemical facilities, the food and beverage sector, the oil and gas industry, and chemical plants.
These valves aid in regulating fluid and gas flow, and system pressure, and preventing abrupt pressure fluctuations.
Additionally, water and wastewater treatment facilities use globe valves. They are used to control the flow of water and wastewater in the system, and to regulate the pressure of the system. Globe valves can also be used in industrial operations like distillation processes.
Moreover, they can be used in extraction drain and condensation-based air-extraction systems. Suitable for use in heater drains, steam vents, etc. these valves have a broad range of applications.
Globe Valves: Different Types
Globe valves come in different types depending on the design. These are the standard type, the angle valve type, and the Y type. Each valve type has its own function and application.
Standard Pattern Globe Valves
Standard Pattern globe valves are among the widely used valves. The disc can move perpendicular to the flow direction since it is positioned horizontally with respect to the ground. Globe valves are able to achieve the highest flow resistance thanks to their tortuous flow path. In addition, regular pattern check valves have the highest pressure drop and lowest flow coefficient. This makes them eligible to be deployed in low-pressure systems and severe throttling conditions.
Angle-Type Globe Valves
Globe valves of this pattern are an improvement over globe valves of common patterns.
As the stem moves vertically through the valve body, the valve disc moves at a 90-degree angle to each other to open and close the valve. These valves have a lower coefficient of flow compared to oblique or Y-pattern globe valves. They are ideal for use in such applications because they can tolerate the slugging effect of pulsing flow.
You may be able to decrease the number of pipe elbows needed in a piping system by using an angle-type globe valve.
Y-Type Globe Valves
The Y-pattern type globe valve can be used to regulate the pressure of a system, regulate the flow of the material in the system, and prevent sudden changes in pressure. They help reduce flow resistance to a minimum. The valve stem is angled at 45 degrees, consequently, at a fully open position, the flow route is essentially straight. Using these globe valves has some advantages. They experience less erosion and can be turned open for extended periods of time. They can also be employed for throttling during peak and beginning periods. Finally, they are simple to clean and you may use a rod to remove debris.
Types of Globe Valves based on Bonnet Connection
In addition to the previously mentioned basic three valve types, globe valves can also be categorized according to how the body and bonnet are connected. These are:
- Screwed Bonnet
- Bolted Bonnet
- Pressure Seal Bonnet
- Welded Bonnet
Screwed Bonnet Types are simple in construction, while bolted bonnet types require a gasket to seal the joint. On the other hand, pressure-sealed bonnets are suitable for high-pressure and temperature applications. Finally, welded bonnet valves are low in weight and can be used with valves where dismantling is not required.
Different Disc Designs in Globe Valves
Globe valves come with three different disc designs. These are:
- Conventional Disc
- Composition Disc
- Plug-Type Disc
Conventional Disc
Also termed a Ball Disc, this is among the oldest type of seat and disc constructions. A metal disc with a ball form and a short taper is part of the construction, and it fits against a seat with a flat surface that is enclosed in the valve body. These disc-equipped valves are reasonably priced and suitable for low-pressure applications where strict throttling is not required. These valves can work for throttling applications but are primarily used to open and close the flow. But, it is generally not preferred due to high erosion.
Composition Disc
These discs have a non-metallic insert ring that helps seat the disc comfortably. This qualifies it for use in applications involving steam and hot water. These discs are resistive to the movement of solid particles without harming the valve and efficiently resist erosion. These disks can be replaced once damaged.
Although the composition discs are better than ball-type discs, they are still not appropriate for throttling. Composition discs come in a variety of sizes, making them appropriate for most applications. Furthermore, these discs are easy to repair and seal tightly.
Plug-Type Disc
The plug type is the one to choose if you’re searching to buy the best globe valve disc. The disc is in the form of a long tapered metal plug that seats into a cone, to produce a wide seating surface. Due to a greater surface area, the disc is less affected by the impact of foreign matter and wire drawing. Full flow conditions can be achieved easily when the valve is opened. When necessary, the seat and disc may be quickly and easily replaced because of the tapered construction.
Benefits of Globe Valves
Globe valves are an essential component of an industrial system. They are intended to regulate pressure, temperature, and the flow of gases and liquids. It is versatile and a popular choice for a variety of applications. Globe valves are also easy to maintain and repair. They are made up of fewer parts than other types of valves, making them less susceptible to wear and tear. Also, they have a long life span, making them a cost-effective choice for many industrial applications.
They are relatively inexpensive to purchase and install and require minimal maintenance. In addition, globe valves are robust and durable. As a result, they can withstand high temperatures and pressures.
Globe Valves- Disadvantages
More than one vertical turn can depressurize these valves and cause a loss of net head. Using large valves in high-pressure applications can be problematic due to noise and performance requirements. Additionally, they weigh more than other valves.
Maintenance and Troubleshooting of Globe Valves
For Globe valves to function properly and efficiently, periodic maintenance and troubleshooting is required. A regular inspection of the valve body is important to ensure there are no leaks or cracks. Additionally, When troubleshooting a globe valve, it is important to check the valve seat to ensure that it is free of debris or buildup. It is also important to check the seals and gaskets to make sure that they are not damaged or worn. The valve stem and disc should also be inspected to make sure they are not deformed or broken. Finally, it is important to check the valve actuator to ensure that it is functioning properly.
Conclusion
Globe valves are essential components used in various industrial processes. They are used to regulate the flow of liquids and gases in plumbing, petroleum, chemical, and other industries. It is important to understand the required isolation valve function to ensure that the valve is operating properly and efficiently.
Below is a description of the different types of industrial valves, their functions, the types of valves, and the benefits they offer. Once you become familiar with isolation valves, you can make an informed decision about which type of valve is best for your application. With the right valve, you can ensure that your industrial system is running efficiently and safely.
If you have any questions or need help with your globe valve needs, you can contact our team of experts at EG Valves. We can help you find the right valve for your application and provide you with the necessary support and maintenance.
