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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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In industrial piping systems, high-temperature and high-pressure conditions have always placed stringent demands on valves. Traditionally, gate valves and ball valves have been the mainstay in such environments, offering reliable sealing performance and pressure-bearing capacity. With advances in valve materials and structural design, however, an increasing number of companies are now asking: &nbs...
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1. Long Bonnet Design 2. Selecting Low-Temperature-Resistant Metal Materials 3. Valve Stem Sealing Design Must Accommodate Thermal Contraction 4. Special Material Matching for Valve Seats and Discs 5. Structural Measures to Prevent External Frosting and Freezing 6. Stricter Requirements for Valve Stem Tensile Strength and Low-Temperature Toughness 7. Anti-Condensation and Freeze Protection Design ...
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In industries such as chemical processing, pharmaceuticals, electroplating, and metallurgy, valves are often exposed to highly corrosive media such as strong acids and alkalis. Conventional metal valve bodies can hardly withstand these conditions for long periods. To extend service life and ensure safe system operation, the PTFE Lined Globe Valve has become the preferred solution for many users. W...
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