Globe Valves – Versatile and Efficient Solutions for Flow Control
Globe valves hold a significant place in the world of industrial valves boasting versatile capabilities and efficient solutions for flow control systems. They have become the go-to equipment in many industries due to their understandability and effectiveness. So, what exactly are globe valves and what makes them so special? To answer this question, we need a walkthrough of how they work, their benefits, and the industries that make use of them. Let’s delve in.
What are Globe Valves?
Globe valves are named for their spherical body shape comprising two halves separated by an internal baffle. This baffle has an opening that forms a seat onto which a movable plug can be screwed in to close (or shut) the valve. The plug is also referred to as a disc or disk¹. In normal operation, the valve is fully open or closed when the disc is rotated to descend or ascend on its matching thread².
How Does a Globe Valve Work?
To comprehend the functionality of the globe valve, it’s necessary to understand its components. The body (or bonnet) houses the valve parts, while the disc (or plug) sits on the seat which in turn determines the valve status (open or closed). The stem links the valve handwheel and the disc to allow control of the valve position. The packing inhibits leakage around the stem³.
In operation, rotating the valve handwheel in a clockwise direction lowers the disc onto the seat, closing the valve and blocking fluid flow. On contrary, anticlockwise rotation raises the disc, opening the valve to allow fluid flow.
Benefits of Globe Valves
One of the unique selling points of globe valves comes from the disc’s design which doesn’t restrict flow when the valve is open. This, in turn, offers better throttling than other valves, making globe valves the perfect fit for applications that require precise flow regulation.
Globe valves are also straightforward to repair. The design makes it possible to remove and replace internal parts without disconnecting the pipeline connections.
Industries That Use Globe Valves
Given that globe valves are highly effective in regulating flow, they are used in several industries.
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Oil and Gas: These industries utilize globe valves for their sealing abilities which minimize leakage – a crucial consideration in the handling of flammable substances.
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Desalination Plants: The harsh environments in these plants require robust equipment that can withstand extreme conditions. The resistive nature of globe valves makes them an ideal choice.
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Marine and Shipping: The globe valves find usage in controlling the flow of liquid coolant, fuels, and lubricants in different marine applications.
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Chemical Plants: In these plants, globe valves help control corrosive or toxic fluids.
In summary, the globe valve’s efficiency and ease of operation make it a highly coveted piece of equipment across numerous industries. As an industry player, taking enough time to understand how globe valves work and their benefits will go a long way to ensure that you make the most out of them.
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