There are three cases: case-plug-5mm, case-plug-8mm and case-plug-11mm in Water Valve tutorial directory. They use the same computational setup, but they have different valve plug positions at different flow rates.
The first difference is in the meshFactory folder, where three different meshes are created for the inlet region, which are in the end of the makeMesh.sh script distributed into case directories/constant/polyMesh.
The second difference is in flow rates in order to compare similar total pressure differences.