1. The greater the amount of spring compression, sealing effect are not necessarily better.Someone to mistake, the greater the amount of spring compression, sealing effect is better.Actually otherwise, large amount of spring compression, can lead to sharp wear and friction pair instantaneous burn out;Excessive compression spring lose the ability of adjusting ring end face, lead to seal failure.

2. The overhaul is better than not hurt.Once appear, the mechanical seal leakage is eager to overhaul, in fact, sometimes mechanical seals are not damaged, only need to adjust working condition or adjust seal can eliminate leakage.So to avoid the waste.

3. The ring seal is not tight, the better.Actually ring seal tight more harm than good, one is the wear between seal and shaft sleeve, premature leakage;2 it is to increase the axial adjustment, mobile, the resistance of the ring in working condition changes frequently unable to timely adjust;3 it is spring fatigue damage easily;Four is to make the ring seal deformation, affect the sealing effect.

4. The static ring seal is not tight, the better.Static ring sealing ring in static state, the basic relatively tight seal when the effect will be better, but too tight is also harmful.One is the cause of excessive static ring seal deformation, affect the sealing effect;The second is the static ring material in the majority with graphite, generally brittle, excessive stress can easily cause fracture;Three is to install and remove the difficult and easy to damage the static ring.

5. Mother impeller lock is not tight, the better.In chemical pump seal leakage, the sleeve and the shaft leakage between (axial leakage) is relatively common.Is generally believed that the leakage of the shaft between the impeller lock the mother didn't lock, actually lead to leakage of the shaft between many factors, such as axial, gasket, deflection, axial end face with impurity, shaft and shaft sleeve with a larger bit error, contact surface damage, the shaft there is gap between various components and shaft thread is too long can lead to leakage between shaft.

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