Pressure-Sealed Gate Valves are a type of industrial valve used to control the flow of fluids (liquids or gases) in high-pressure and high-temperature applications. These valves are designed to provide a secure and reliable seal under extreme pressure conditions. Here are the key features and characteristics of pressure-sealed gate valves:
Pressure Sealing Mechanism: Pressure-sealed gate valves utilize a unique design that employs the system pressure to enhance the sealing force between the gate and the valve seats. As the pressure within the system increases, it forces the gate against the seats, creating a tighter and more effective seal.
Bonnet Design: The valve bonnet in pressure-sealed gate valves is typically designed to withstand high pressures. It is often bolted or threaded to the valve body, creating a robust seal that prevents leakage at the bonnet-to-body connection.
Rising Stem Design: Most pressure-sealed gate valves feature a rising stem design, where the stem moves upward as the valve is opened, providing a visual indication of the valve's position.
Solid Wedge Gate: The gate in pressure-sealed gate valves is usually a solid wedge design. This wedge shape helps to provide a tight seal against the valve seats, even under high pressures.
Applications: Pressure-sealed gate valves are commonly used in industries such as power generation (nuclear and fossil fuel plants), oil and gas refining, petrochemical processing, and other applications involving high-pressure steam, high-temperature fluids, or corrosive environments.
High Pressure and Temperature Ratings: These valves are designed to handle extremely high pressures and temperatures, often exceeding those of standard gate valves. They are built to withstand harsh operating conditions and maintain a reliable seal.
Maintenance Challenges: Pressure-sealed gate valves can be more complex to maintain and operate compared to standard gate valves due to their specialized design and higher performance requirements. Proper installation, operation, and regular maintenance are essential to ensure their optimal functioning.
Variations: While pressure-sealed gate valves are commonly used, variations in design and materials can exist between manufacturers. Users should carefully consider factors such as material compatibility, pressure and temperature ratings, and industry standards when selecting a pressure-sealed gate valve for a specific application.
|Pressure Sealed Gate Valves Specification|
|Design Standard||ASME B16.34 / API 600|
|Pressure/Temperature Chart||ASME B16.34|
|Face to face Dimension||ASME B16.10|
|Testing Standard||API 598|
|Material||Carbon Steel, Stainless Steel & Other Materials|
|Flange Details||ASME B16.5 UP TO 24″|
|Butt-Weld End Details||ASME B16.25|
|Size Range||2″ – 24″ (DN50 – DN600)|
|ASME Class||150 – 1500|
|Bore Type||Full Bore and Reduced Bore|
|Ends||Flange ends, Butt-weld End|
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|Pressure Sealed Gate Valves Latest Price||$ 65.50 - $ 54|
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Oil & Gas Industry
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