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Different Types Of Industrial Valves And Their Uses

steel pipelines and cables in a plant,Industrial zone.
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A valve is a device used to regulate the flow of fluids, gasses, and slurries within an enclosure. As well as being known as regulators, they have a wide range of applications. The size, shape, design, and function of valves can vary greatly. The control mechanism and the valve function can be used as methods of classification for valves.

Types of Industrial valves

  1. Ball Valve

A ball valve belongs to the family of quarter-turn valves. A ball valve is characterized by a hollow disc that stops or starts media flow through its hollow core.

Applications

These valves can be used to shut down fluids, gasses, and vapors that need bubble-tight seals. Although primarily used with low pressures, ball valves with metal seats can also be used with high pressures and high temperatures.

  1. Butterfly Valve

Another type of quarter-turn valve is the butterfly valve. Unlike other valves, the butterfly valve has flat to concave discs that attach to the stem.

Located in the middle of the valve and connected to the stem on one side, the disc restricts flow when the valve is closed. The stem provides additional support for the disc. A butterfly valve has the capability of throttling as the valve opens incrementally.

Applications

Butterfly valves are commonly used to isolate and interrupt media flows in water and gas applications. Butterfly valves are particularly useful when large diameter pipes are used. They are also ideal for working with slurries, cryogenics, and vacuum systems.

  1. Check Valve

Rather than being operated by an external force, a check valve opens and closes by internal pressure. The main function of a check valve, also known as a non-return valve, is to prevent backflow.

Applications

Applications requiring backflow prevention, like pumps and compressors, require the use of check valves. Check valves are often used in steam boiler feed pumps. Check valves are also commonly used in chemical and power plants. A check valve is also useful when more than one gas is present in a pipeline.

  1. Gate Valve

A gate valve belongs to the shut-off/on valve family. The unique feature of this valve is its linear disc movement. The gate or wedge-shaped disc provides an effective shutdown and locking. Isolation is the primary function of gate valves.

However, using it as a throttling valve is not recommended due to the possibility of damaging the disc. In a throttling application, gate valves used half-closed can damage the disc due to the surge of the media.

Applications

Regardless of the application, gate valves are excellent shut-off/on valves. In addition to wastewater applications, they are also suitable for neutral liquids. With a maximum pressure of 16 bar, gate valves can be used on gasses ranging from -200°C to 700°C. A knife gate valve is used for handling slurries and powders. A gate valve is also used in the sea dock for controlling the flow of water in the dock.

  1. Globe Valve

Globe valves have a plug-type disc that looks like a globe. They are part of the linear motion valve family. The globe valve has great throttling abilities as well as is a great way to turn the valve off and on.

In a similar fashion to the gate valve, the disc of the globe valve moves upward unhindered. If you do not need high-pressure drops, this is a good valve alternative.

Applications

When leakage is a major concern, globe valves perform well. The globe valve is used in vents and drains at high and low points. Moreover, globe valves are suitable when pressure drops do not matter.  They are used for regulating water flow in cooling systems. Globe valves are also used for chemical feed, feedwater, and extraction drain systems.

  1. Needle Valve

Its needle-shaped disc gives the needle valve its name. The needle valve works the same way as a globe valve. Smaller piping systems can be controlled more precisely with the needle valve. While still within the quarter-turn family, needle valves are better at low flow rates.

Applications

In instruments that require fuller control of fluid surges and more precise fluid flow, needle valves are used. The most common application for needle valves is calibration. Additionally, needle valves are used to regulate media flow in pipe systems at distribution points.

Conclusion

These are the most popular types of industrial valves that have diverse applications. Valves play a significant role in almost all industries especially in power generation, food processing, oil and gas, and petrochemical industries.
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