When working with various fluids that are traversing within enclosed systems, it is very beneficial to have as much control over flow and movement as required for safety, performance, etc. In order to achieve this, it is common to use valves which are devices with adjustable orifices and elements that allow flow to effectively be manipulated. Based on one’s needs, there are a number of valves to choose from, each varying in its specific design and capabilities. One popular type of valve for control is the non-return valve, and this device is a single-way valve that only permits fluids to flow in a singular direction. This is crucial when fluids cannot be allowed to move upstream, whether this is due to issues such as increased fluid pressure, contamination, performance loss, etc. In this blog, we will discuss the functionality and design of non-return valves, allowing you to have a better understanding of the options available for you and when they can be used.