The main reasons for the leakage of the mechanical seal are the following aspects:
1. Mechanical seal itself has problems, mainly in the following situations. Improper selection of mechanical seals, sealing surface is relatively wide or narrow, or mechanical seal of the spring load coefficient is relatively large or small, or mechanical seal face pressure design is not reasonable, etc..
2. Mechanical seal installation problems. In the installation process, the installation environment is not normal, the installation method is not correct, the installation is not smooth or the installation is not in place.
3. Mechanical seal auxiliary system problems. The main mechanical seal cooling water flow rate is very low, the gland flushing holes to plug, cooling pipe scaling etc..
4. Media and working conditions exist problems. When the pump working medium containing solid particles, or when the pump does not have a working medium when the pump is evacuated, the pump is less than the minimum flow of its own design, pump outlet pressure fluctuations.
5. Boiler feed pump's own fault, pump rotor axial channeling large, rotor periodic vibration.
