When a production line experiences uneven thermal expansion between adjacent pump housings, the gap can cause misalignment and premature wear. A spacer plate built to the VW/Audi standard is inserted between the two housings to lock the axial distance at the design value. In a chemical processing plant the part sits directly behind the pump seal, absorbing vibration that would otherwise travel to the pipe network and disturb flow stability. Because the plate provides a repeatable, flat surface, technicians can swap out bearings or impellers without recalibrating the whole assembly, which cuts downtime during scheduled maintenance. The same component is also found in power‑generation turbines where it separates the rotor hub from the casing, allowing thermal growth while preserving clearances. A recent retrofit on a municipal water‑treatment facility replaced a corroded plate, restored the intended clearance and stopped recurring seal leaks within a single shift.