Size Range: DN50-DN600 (2’’-24’’)

Suitable Medium: Water

Standards: EN12334, BS5153, MSS SP-71, AWWA C508

Pressure Ratings: CLASS 125-300, PN10-25, 200-300 PSI

Material: Cast Iron (CI), Ductile Iron (DI)

Valve Type: Swing

What is a Swing Check Valve and How Does it Work

A swing check valve is a one-way valve that allows fluid (liquid or gas) to flow in one direction while preventing backflow. It operates through a hinged disc that swings open when fluid flows forward and automatically closes when flow stops or reverses. This ensures that the medium only travels in one direction. The valve's self-acting design requires no external controls for operation, making it reliable and efficient for various applications.

Opening Mechanism: When fluid flows through the pipeline in the intended direction, the pressure lifts the disc upwards (or sideways in some designs), allowing the medium to pass.

Closing Mechanism: As flow decreases or reverses, gravity and reverse pressure push the disc back onto its seat, closing the valve and preventing backflow. This ensures that the system stays protected from reverse flow or contamination.

Why Do You Need a Swing Check Valve

Swing check valves play a crucial role in maintaining the integrity of piping systems by preventing backflow, which can cause system damage, contamination, or inefficient operation. These valves are commonly used in industries such as chemical processing, petroleum, water treatment, and power generation, where managing the direction of flow is vital for equipment protection and process stability.

Key Advantages

Durable Construction: The robust disc and bonnet design ensure long-lasting performance, while the hinge mechanism adds to the valve’s durability.

Minimal Pressure Drop: Swing check valves are designed to minimize turbulence and pressure loss, ensuring smooth operation and enhanced system efficiency.

Self-Closing Feature: When fluid pressure drops to zero or reverses, the valve automatically shuts, preventing backflow and eliminating the risk of water hammer.

Flexible Installation: Although typically installed horizontally, swing check valves can also be mounted vertically when necessary, offering versatility in installation.