The advantages and disadvantages of the globe valve ...

Advantages of the globe valve: Superior sealing capability

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The globe valve stands out due to its robust sealing properties, ease of operation, and extended lifespan. It is capable of halting or regulating the flow within a pipeline, with a unique design where the disc moves vertically to cut off the fluid completely, ensuring an excellent shut-off. This makes the globe valve particularly suitable where minimal flow is required.

Cons of the Globe Valve: High pressure drop

One of the main drawbacks is the significant pressure loss encountered when the valve is closed, which increases fluid resistance and results in a pressure drop across the pipeline, subsequently reducing the flow rate. The extent of valve opening directly impacts pressure loss, and the gate mechanism introduces more fluid turbulence, leading to higher vibrations and noise.

Downsides of the Globe Valve: Higher cost

Compared to gate valves, globe valves incur higher costs in both usage and maintenance. Nonetheless, for applications with minimal flow requirements, a globe valve can be advantageous. Thus, choosing between a gate valve and a globe valve depends on multiple factors specific to the application.

Advantages of Gate Valves: Resistance to clogging

The gate valve features a disc that moves axially within the pipe, making it suitable for more viscous fluids or high-velocity gases. Its design helps prevent clogging by particulate media and is effective even in high-solids environments such as sewage systems.

Drawbacks of Gate Valves: Moderate sealing efficiency

Gate valves achieve sealing through the compression of the disc against the seat, which may not be optimal in high-vibration settings. This sealing method can affect their lifespan, and for applications demanding high sealing efficiency, a gate valve is generally less recommended.

Gate Valve Benefits: Lower operational force

The lever mechanism of the gate valve reduces required operating force, facilitating quicker opening and closing functions. Consequently, gate valves are preferable for frequent adjustments in certain scenarios over globe valves.

In conclusion, both globe and gate valves have their respective advantages and limitations. Selection should be based on specific requirements and conditions, while proper maintenance will extend the valves' operational life.

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Release time：2022-11-29
View count：2037

The plug valve offers a series of unique benefits. Its top-mounted design simplifies structure, facilitates online maintenance, and minimizes body leakage, thus enhancing pipeline system strength.

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The valve body of plug valves exhibits strong resistance to corrosive substances commonly found in chemical processes. Its integral bushing shields the valve internals from wear and tear, making maintenance both cost-effective and straightforward. Plug valves also boast minimal processing requirements compared to ball valves.

Plug valves are highly customizable to meet specific user needs, and their surface-sealing coating offers zero leakage per API598 Soft seal seat test requirements.

Disadvantages: Increased torque requirements

The surface seal design of plug valves necessitates higher driving torque, escalating the costs for users who employ pneumatic actuators. Additionally, incorrect material selection or valve body design can lead to bushing expansion and drive torque variability.

Initial investments for plug valves are typically higher than ball valves; however, due to their long-term reliability and lower lifecycle costs, they are becoming widely accepted across industries.

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