A Flanged Swing Check Valve is a type of check valve designed to allow fluid flow in one direction while preventing backflow in the opposite direction. It features a flanged end connection, which allows for easy installation and secure attachment to piping systems using bolts. The valve operates using a swinging disc or flap that opens with forward flow and closes automatically when the flow stops or reverses, ensuring reliable backflow prevention.
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Key Features:
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Material: Typically made from materials such as cast iron, carbon steel, stainless steel (e.g., CF8M), or other alloys, depending on the application and fluid compatibility.
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Swing Disc Design: Features a hinged disc that swings open with forward flow and closes by gravity or backpressure when the flow stops or reverses.
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Flanged Ends: Equipped with flanged ends for easy installation and secure connection to flanged piping systems.
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Pressure Rating: Available in various pressure ratings (e.g., 150#, 300#, 600#) as per ANSI, ASME, or API standards.
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Temperature Range: Suitable for a wide range of temperatures, depending on the material and seat design.
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Sealing: Uses metal-to-metal seating or soft seats (e.g., rubber or PTFE) for tight sealing and durability.
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Automatic Operation: The disc operates automatically based on flow direction, requiring no external power or manual intervention.
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Full Port or Reduced Port: Available in full port (full bore) or reduced port designs, depending on flow requirements.
Advantages:
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Backflow Prevention: Effectively prevents reverse flow, protecting equipment and pipelines.
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Low Pressure Drop: The swing disc design minimizes pressure drop when the valve is fully open.
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Easy Installation: Flanged ends allow for quick and secure installation in piping systems.
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Automatic Operation: No external power or manual intervention is required for operation.
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Durability: Robust construction ensures long service life, even in demanding environments.
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Versatility: Available in various materials, sizes, and pressure ratings to suit different applications.
Considerations:
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Orientation: Must be installed in the correct orientation (horizontal or vertical) to ensure proper operation.
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Disc Movement: The swinging disc may cause water hammer in high-pressure systems, requiring additional measures (e.g., dampers or slow-closing mechanisms).
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Size and Weight: Larger sizes can be heavy and may require additional support during installation.
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Maintenance: The hinge mechanism and disc may require periodic inspection and maintenance to ensure proper functioning.
