Valves 101: Spring Check Valves versus Swing ...

Valves 101: Spring Check Valves versus Swing Check Valves

In various industries, swing check valves are the most commonly used type of check valve. They are often a cost-effective and reliable choice in many applications. However, it's essential to differentiate between swing check valves and spring check valves to ensure the best application for your needs. In this article, we'll explore the fundamental differences between these two types of inline check valves and discuss the unique advantages offered by spring check valves.

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1. The difference between swing check valves and spring check valves. The mechanism of operation distinguishes swing check valves from spring check valves. A swing check valve has a flapper that swings away from its seat to allow forward flow and returns to its seat when the flow stops. In contrast, a spring-loaded check valve utilizes a spring mechanism to aid in closing the valve, providing a more rapid response during flow reversal.

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2. Installation orientation limitations. Swing check valves are only suited for horizontal flow applications, significantly limiting where they can be installed. Although they typically offer a larger flow capacity (assuming a fully open condition), their installation constraints may not fit existing piping configurations. Spring-loaded check valves provide greater flexibility, as they can be installed in any orientation with appropriate spring selections, making them ideal for skid systems or tight spaces with unique piping directions.

3. Impact on water hammer effects. Water hammer can become a significant issue in piping systems, and swing check valves may exacerbate this phenomenon. For example, if a water line has a swing check valve and a downstream control valve that closes abruptly, the flow reversal can create a pressure wave that forces the swing check's flapper to slam shut, producing noise and accumulating wear on the valve and surrounding components. Conversely, a spring check valve helps mitigate or even eliminate water hammer effects. The spring mechanism allows the valve to close before the pressure wave reaches it, resulting in a quieter operation and reduced potential for damage.

We hope this article clarifies the distinctions between swing check valves and spring check valves while highlighting the benefits of utilizing spring check valves in your systems. Each valve manufactured by Check-All Valve is a spring-loaded piston/poppet style check valve, and we're here to assist with any inquiries you may have. Don't hesitate to share your questions in the comments or connect with us on social media for further discussions. Stay tuned for our upcoming articles!

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