What Is a Swing Check Valve

A swing check valve uses a hinged disc that swings open when fluid flows forward and closes when flow reverses. It relies solely on gravity and the force of backflow to operate the disc.

Advantages:

• Simple construction with fewer moving parts

• Low pressure drop across the valve

• Suitable for large-diameter pipes

• Ideal for horizontal pipelines

Disadvantages:

• Slower closing time, which may lead to water hammer

• Not ideal for vertical or pulsating flow systems

• Requires more installation space due to the swinging action

Common Applications:

• Water and wastewater treatment plants

• Oil and gas pipelines

• Fire protection systems

• General-purpose industrial fluid systems

What Is a Spring Check Valve

A spring check valve incorporates a spring-loaded disc or piston that rapidly returns to the closed position when the forward flow ceases. It offers quick shut-off and a compact design.

Advantages:

• Fast-closing action helps prevent water hammer

• Can be installed in both vertical and horizontal positions

• Compact and space-saving

• Available in multiple configurations (inline, angle, Y-pattern)

Disadvantages:

• Slightly higher pressure drop due to the spring resistance

• More complex internal components, which may require more maintenance

• Not always ideal for large diameters or low-pressure systems

Common Applications:

• HVAC systems

• Compressed air systems

• Chemical processing lines

• Food and beverage pipelines

• Small pumps and booster systems

Side-by-Side Comparison

Choosing the Right Valve

• Use Swing Check Valves when dealing with clean, low-viscosity fluids, large pipe diameters, and systems where flow is relatively steady.

• Use Spring Check Valves when you need rapid closure, vertical mounting, or you're dealing with pulsating flows or pressurized systems.