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1. What Is a Valve Welding Electrode? A valve welding electrode refers to a category of welding consumables specifically used for hardfacing, repair welding, and overlay welding of valve components, including the valve body, sealing surfaces (such as valve seats and valve discs), as well as welding joints between valves and pipelines. It is not a single product, but rather a general ...
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The differences between butterfly check valves and swing check valves lie not only in their structural design but also in their typical applications. Although both valve types share the same functions—preventing backflow, enabling light-load pump starting, and reducing water hammer—their design characteristics and operational ranges differ. Both valve types feature a disc-shaped...
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Both V-port ball valves and O-port ball valves are important types of ball valves, with clear differences in design, applicable media, and control performance. Understanding these differences helps engineers make more appropriate selections for specific applications. Design and Characteristics of V-Port Ball Valves V-port ball valves feature a distinctive partial-sphere ball design w...
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The primary function of a check valve is to prevent backflow of the medium. However, in practical engineering, after installation and commissioning, issues such as flow obstruction, abnormal pressure drop, or even backflow may still occur. These problems are generally not caused by valve quality, but by incorrect installation orientation, system operating conditions, or improper valve selec...
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PTFE-Lined Butterfly Valves are commonly used in piping systems to achieve flow shut-off and regulation, and they are widely applied in industries such as petroleum, chemical, metallurgy, and hydropower. In existing butterfly valve technology, the valve’s sealing primarily relies on soft sealing materials, such as rubber or polytetrafluoroethylene (PTFE). These valves feature a seat s...
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As one of the most widely used shut-off valves in industrial pipeline systems, the gate valve is valued for its simple structure, low flow resistance, and broad applicability across oil and gas, chemical processing, power generation, water treatment, and other industries. However, like any type of valve, a gate valve has both strengths and inherent limitations. Understanding these advantages and d...
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Gate valves are among the most commonly used shut-off valves in industrial piping systems. With their simple structure, low flow resistance, and reliable sealing performance, they are widely applied in the energy, petrochemical, water treatment, and metallurgical industries. However, a gate valve is not a “universal solution.” Using the wrong medium, incorrect installation, or operatin...
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Globe valves are one of the most commonly used control valves in industrial piping systems, primarily designed to stop or regulate fluid flow. In industries such as chemical, petroleum, power generation, and pharmaceuticals, the reliability of a globe valve directly affects production safety and equipment lifespan. However, with the wide variety of globe valves available on the market, how can one...
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Globe valves operating under low-temperature conditions, such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, or liquid argon, face higher demands on materials, structure, and sealing performance. In low-temperature environments, metals can become brittle, sealing materials may contract, and the valve stem area can even experience freezing blockage. Therefore, standard globe valves...
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