Check Valves

Check Valves from Atlantic Valves

Check valves are essential components in fluid control systems, preventing backflow and ensuring a unidirectional flow of liquids or gases. Also known as non-return valves or one-way valves, they protect pipelines, pumps, and other critical equipment from pressure surges and contamination. At Atlantic Valves, we offer a premium selection of stainless steel swing check valves and vertical spring-loaded check valves to meet the needs of various industries.

Types of Check Valves

Swing Check Valves

Swing check valves, also known as tilting-disc check valves, use a freely swinging disc on a hinge to regulate flow. As media flows forward, the disc swings open, allowing unrestricted movement. When pressure drops or reverses, the disc swings shut, preventing backflow and sealing the passage. These valves are ideal for applications that require minimal flow restriction. They can be installed horizontally or vertically (if fluid flows from bottom to top). Their design makes them suitable for water, gas, fuel, and other fluid systems that require efficient, low-resistance flow control.

Vertical Spring-Loaded Check Valves

Vertical check valves, also known as spring check valves or spring-loaded check valves, use an internal spring to maintain closure until sufficient pressure is applied to open the valve. Unlike swing check valves, which rely on gravity and backflow pressure to close, these valves automatically shut when the flow pressure drops below the cracking pressure.

Spring-loaded check valves provide stronger backflow prevention and can be installed in any orientation, making them a versatile choice for pressurized systems and applications where rapid shutoff is needed.

Common Applications for Check Valves

• • Water Treatment: Prevents contamination and maintains consistent flow in filtration and distribution systems.

  • HVAC Systems: Ensures proper fluid direction in heating and cooling systems.

  • Industrial & Manufacturing: Protects pumps and process pipelines from backpressure damage.

  • Oil & Gas: Controls fluid movement in pipelines and fuel transfer applications.

Frequently Asked Questions (FAQ)

What does a check valve do?

Check valves prevent backflow in fluid systems by allowing media to flow in only one direction. They help maintain pressure integrity, prevent contamination, and protect sensitive equipment from reverse flow damage.

How does a check valve work?

Check valves operate based on pressure differences. When the inlet pressure is greater than the outlet pressure, the valve opens. When the pressure drops or reverses, the valve closes, stopping backflow. Swing check valves rely on gravity and flow direction, while spring-loaded valves use a spring to force closure.

Can you install a check valve with a solenoid valve?

Yes! It is highly recommended to install a check valve downstream from a solenoid valve. Solenoid valves with diaphragm mechanisms can malfunction if exposed to backflow or back pressure. A check valve helps extend the lifespan and efficiency of solenoid valves.

How do you install a check valve?

Check valves should be installed in the direction of flow, indicated by an arrow on the valve body. Swing check valves must be installed in a horizontal position or vertically with upward flow. Vertical check valves can be installed in any orientation.

Can check valves stop water hammer?

Check valves can help reduce or prevent water hammer, though swing check valves may contribute to it if the disc closes too slowly or too quickly. Spring-loaded check valves are the preferred choice for preventing water hammer, as they close gradually with decreasing pressure before the flow reverses.

Find the Right Check Valve for Your Needs

Atlantic Valves provides high-quality check valves built for durability, efficiency, and reliability. Whether you need a stainless steel swing check valve for low-resistance flow or a spring-loaded check valve for superior backflow prevention, we have the right solution for your system.
Explore our range of check valves today and contact our team for expert assistance in selecting the perfect valve for your application.