Changeover valves are a switchover valve, switching flow from one line to another. They are sometimes referred to as “selector” valves. Changeover valves are well suited to applications where mandatory pressure relief devices (rupture discs and relief valves) are installed as dual devices.
The design of the changeover valve ensures that at least one of the two pressure relief devices is always in service and full relief flow is guaranteed during changeover.
They are also widely used in Plastic and Polymer, Offshore, and Refining industries to handle process media.