stuffing box manual operation

A stuffing box or gland package is an assembly which is used to house a gland seal. It is used to prevent leakage of fluid, such as water or steam, between sliding or turning parts of machine element

On a boat, a stuffing box typically consists of a stern tube, which is slightly larger than the prop shaft, and a gland nut or packing nut, which threads onto the stern tube. The two compress packing material wrapped around the shaft, which passes through the assembly from the Motor to the propeller.

Creating a proper plunger alignment is critical for correct flow and a long wear life. Stuffing box components are of stainless steel, brass or other application-specific materials. Compression packing is rigorously tested to ensure effective sealing in valves, pumps, agitators, and other rotary equipment.