Regarding managing fluid flow in piping systems, engineers have been using valves for centuries. Out of different types of valves, sanitary check valves are known for their ability to prevent backflow, blockage, and cross-contamination. However, like any other equipment, they come with advantages and disadvantages. In this blog post, we will discuss the pros and cons of sanitary check valves and help you determine whether they are the right fit for your needs.

Advantages of Sanitary Check Valve

Prevent backflow: The most significant advantage of a sanitary check valve is that it prevents backflow, i.e. the flow of fluids in the opposite direction. Backflow can cause serious problems in a pipeline system, such as contamination, corrosion, and equipment damage. Check valves can prevent backflow by utilizing various mechanisms such as spring-loaded, swing, and disc.

Reduce blockage: Sanitary check valves also reduce the risk of blockage by maintaining the flow of fluid and avoiding stagnation. Blockage can increase the pressure within a pipeline, leading to leaks and ruptures.

Easy to install: Sanitary check valves are incredibly easy to install. They come with basic fasteners or flanges and can be installed in different orientations. Moreover, they do not require any maintenance.

Lower maintenance cost: Due to their simple design, sanitary check valves require minimal maintenance. The cost of maintaining and repairing a check valve is much lower than other valves.

Affordable: Lastly, they are affordable valves when compared to other types of valves.

Disadvantages of Sanitary Check Valve

Pressure drop: While preventing backflow and maintaining fluid flow, sanitary check valves also cause small pressure drops. This pressure drop can increase the energy consumption of the pump and affect the overall efficiency of the system.

Limited flow rate: Sanitary check valves are only suitable for low to moderate flow rate systems. They are not recommended for high-flow rate systems, mainly because of the increased pressure drop.

Not suitable for vapour: Check valves are unsuitable for managing vapour or gas systems, mainly because of back-pressure concerns and low-pressure sealing.

Limited lifespan: While sanitary check valves are durable, they have a limited lifespan when compared to other types of valves. The life of a check valve depends upon the nature of the flow, pressure, and the environment in which they are used. They may require replacement or repair in a few years.

Conclusion:

Before deciding to use sanitary check valves in your pipeline system, it is essential to weigh their advantages and disadvantages. While they are beneficial for preventing backflow, reducing blockage, and saving maintenance costs, they may not be suitable for high flow rate or gas systems, and they may require replacement every few years. Thus, it is essential to consult with valve experts and adhere to industry standards like ASME BPE or 3A to ensure the effectiveness and safety of your piping system.

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