Views: 0 Author: J-VALVES Publish Time: 2025-06-04 Origin: Site
Understanding Swing Check Valves
Swing check valves, also known as tilting-disc check valves, consist of a hinged disc that swings open to allow fluid flow in the forward direction and closes to prevent backflow. The disc is mounted on a hinge or trunnion, allowing it to pivot and seal against the valve seat.
Key Features
• Hinged Disc: The disc swings open with fluid flow and closes to prevent backflow.
• Low Pressure Drop: Swing check valves typically have a lower pressure drop compared to lift check valves due to their design.
• Compact Design: These valves are often more compact and suitable for installations with limited space.
• Pumping Systems: Used in systems where the fluid flow is primarily in one direction, such as in water supply systems.
• Process Pipelines: Suitable for applications where space is a constraint and low pressure drop is desired.
Understanding Lift Check Valves
Lift check valves, also known as piston check valves, consist of a disc or piston that lifts off the seat to allow fluid flow and drops back to prevent backflow. The disc is guided by a stem, ensuring precise movement and reliable sealing.
• Guided Disc: The disc is guided by a stem, ensuring precise movement and reliable sealing.
• Higher Pressure Drop: Lift check valves typically have a higher pressure drop compared to swing check valves due to their design.
• Vertical Installation: These valves are often installed vertically to ensure proper operation.
• Vertical Pipelines: Suitable for vertical installations where the fluid flows upward.
• High-Pressure Systems: Often used in systems requiring high-pressure sealing and precise control.
• Swing Check Valves: The disc swings open and closes on a hinge, allowing for smooth and low-pressure-drop operation.
• Lift Check Valves: The disc lifts vertically off the seat, guided by a stem, resulting in higher pressure drop but more precise control.
• Swing Check Valves: Generally have a lower pressure drop due to the smooth flow path when the disc is fully open.
• Lift Check Valves: Typically have a higher pressure drop due to the restricted flow path when the disc is partially lifted.
• Swing Check Valves: Can be installed in various orientations, including horizontal and vertical, making them versatile for different applications.
• Lift Check Valves: Typically installed vertically to ensure proper operation and reliable sealing.
