Reliable Backflow Prevention for Industrial Applications

Details of BS 5153 PN16 Cast Iron Swing Check Valve

• Size: DN50-DN600 (2’’-24’’)
• Medium: Water
• Standard: EN12334/BS5153/MSS SP-71/AWWA C508
• Pressure: CLASS 125-300/PN10-25/200-300 PSI
• Material: Cast Iron (CI), Ductile Iron (DI)
• Type: Swing

What is the Swing Check Valve and How Does it Work?

The swing check valve is a type of one-way valve used to allow fluid (liquid or gas) to flow in one direction while preventing backflow. It operates using a hinged disc that swings open when fluid flows in the desired direction and closes when the flow stops or reverses, ensuring the medium only travels one way. The valve is self-acting, meaning it requires no external control to operate.

When fluid pressure pushes through the pipeline in the intended direction, the disc swings upwards (or sideways) to open the valve, allowing the medium to pass. As the fluid flow decreases or reverses, gravity and reverse pressure push the disc back onto the seat, closing the valve and preventing backflow. This simple mechanism makes swing check valves highly reliable in many industries.

Why Do You Need a Swing Check Valve?

Swing check valves are used in various applications, handling mediums such as steam, water, nitric acid, oil, and solid oxidizing agents. They are common in industries like chemical processing, petroleum, fertilizers, pharmaceuticals, and power generation. Swing check valves are ideal for preventing reverse flow in pipelines, maintaining system integrity, and preventing damage to equipment like pumps.

Key advantages of BS 5153 PN16 Cast Iron Swing Check Valve

• Durable Design: The disc or bonnet design makes the valve easy to maintain, while the hinge around the shaft ensures its long-term durability.
• Low Turbulence & Pressure Drop: Swing-type check valves produce minimal turbulence and pressure drop, improving system efficiency.
• Self-Closing Mechanism: When the fluid pressure becomes zero, the valve shuts down completely to prevent backflow and eliminate destructive water hammer in the pipeline.
• Flexible Installation: Swing check valves are primarily installed horizontally, but can also be vertically mounted if needed.