What controls the maximum lift of the disk on a stop check valve?

The maximum lift of the disk on a stop check valve is primarily controlled by the position of the valve stem. In a stop check valve, the valve stem connects to the disk and dictates how far the disk can rise or fall in response to changes within the system. When the stem is positioned to allow for maximum lift, the disk can fully open to facilitate flow. This arrangement is essential for allowing or restricting fluid movement based on system needs.

While the other factors may influence overall operation—like pressure and temperature affecting flow behavior—they do not set the actual limit of how high the disk can move. The size of the valve could affect flow capacity but does not inherently control the disk's maximum lift in relation to operational parameters. Understanding this mechanism is vital for proper valve selection and system design in marine and industrial applications.