Replacement of spares of mechanical seal unit of pumps

To describe a standard operating procedure for replacement of spares of mechanical seal unit of pumps. The standard operating procedure describes in detail the method of replacing spares of mechanical seal unit of pumps in the plant.
The responsibility of replacing the spares of mechanical seal unit of pumps lies with the staff of rank not lower than supervisor of maintenance department.
Mechanical seal unit of pumps, Replacement of spares, Engineering, 'O' rings