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Types of Non Return Valve and Their Uses

Non Return Valve

Non return valves, also known as check valves, play a significant role in ensuring efficient flow control and protection of piping systems from floods or potential backflow. These valves prevent the reverse flow of fluids or gases, ensuring that the liquids only pass through in one direction. This blog will help you understand the different types of non return valves and their uses, enabling you to choose the right type of check valve for your piping application.

Swing Check Valve:

The swing check valve is one of the most common types of non-return valves. The valve consists of a swinging disc that opens during the forward flow of liquids or gases and closes during backflow. Swing valves are commonly used in water, petroleum, food processing, and chemical industries.

Wafer Check Valve:

The wafer check valve is a multi-directional valve ideal for tight spaces. It is designed to work in multiple applications, including food, gas, and water systems. These valves are much smaller than other check valves and are installed between flanges to save space, making them ideal for industrial piping projects.

Tilting Disc Check Valve:

Tilting disc check valves are spring-loaded and work on gravity and pressure difference principles. These valves are designed with a disk or cone and tilted at an angle. When the flow is forward, it pushes the disk or cone upwards, allowing the liquid to pass. The disc returns to its original position in backflow, stopping the flow.

Duo Check Valve:

The duo check valve is unique because it has two plates, providing double protection against backflow. These plates move independently of one another, ensuring that the valve remains operational even if one plate fails. It is ideal for leak prevention and can handle high pressure and temperature.

Diaphragm Check Valve:

Diaphragm check valves are suitable for low to medium-pressure systems. They work by compressing the rubber diaphragm, which opens the valve and allows fluid to pass through. The diaphragm is a valve seat during backflow, stopping the fluid or gas from returning. This valve is often used in the water treatment and semiconductor sectors.


In conclusion, selecting the right non-return valve is essential for maintaining the efficiency and safety of your piping system. Choosing the wrong valve can harm your operation, causing leaks, reduced flow, and system failure. It is, therefore, vital to understand the different types of check valves and their specific uses. Hopefully, this blog post has provided you with valuable information on the various types of non return valves and their intended applications.

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