1. Spring compression, the greater the sealing effect is better. In fact, excessive compression spring can lead to rapid wear friction, instantaneous burning; excessive compression spring loses its ability to adjust ring face, resulting in seal failure.
2. Moving ring seal the better the better. In fact, dynamic tight ring seals harmful. One is the increased wear, sealing ring and sleeve premature leakage; two is to increase the dynamic axial adjustment of the resistance movement, the frequent changes in working conditions can not adjust; three spring fatigue is easy to damage; the four is to make dynamic ring seal deformation, affecting sealing effect.
3. Static ring sealing ring, the closer the better. Static seal ring is basically in a static state, the relatively tight sealing effect will be better, but too tight is harmful. One is caused by excessive deformation of the static ring, the effect of sealing effect; two is the static ring material in the majority of graphite, generally more brittle, excessive force is very easy to cause fragmentation; three is the installation, demolition difficult, very easy to damage the static ring.
4. Impeller lock the mother, the better. Mechanical seal leakage, leakage between the sleeve and the shaft (inter axis leakage) is relatively common. Generally, the impeller shaft between the leak is not the lock master lock, in fact lead to inter axis leakage of many factors, such as axial pad failure, migration, axis there are impurities, shaft and sleeve with a larger form bit error, contact surface damage, shaft gap between the parts, the first thread long will lead to inter axis leakage. Lock nut lock will only lead to excessive axial pad between premature failure, on the contrary a moderate locked mother, so that axis pad compression always maintain a certain flexibility in the operation of the lock master will automatically lock the right time, so that the shaft is always in good sealed state.
5. New is better than the old one. Relatively speaking, the use of new mechanical seal is better than the old, but the quality of the new mechanical seal material selection or not at that time, with the larger size of the error will affect the sealing effect; and permeability in the polymerization medium, such as static ring without excessive wear, or not replaced at all. Because the static ring in the static ring seat for a long time in a static state, so that the polymer and impurities deposited as a whole, has played a good role in sealing.
6. Demolition repair is better than not. Once the mechanical seal leakage will be eager to repair, in fact, sometimes the seal is not damaged, just adjust the operating conditions or the appropriate adjustment of the seal can eliminate leakage. This will not only avoid waste and can verify their ability to judge the fault, the accumulation of maintenance experience to improve the quality of maintenance.
