What are the main materials of chemical pump mechanical seal

How to correctly use chemical pump mechanical seal: 1, chemical pump mechanical seal spring compression the greater the sealing effect, the better. In fact, the spring compression is too large, can lead to rapid wear of the friction pair, instant burning; Excessive compression causes the spring to lose its ability to adjust the end face of the moving ring, resulting in seal failure. 2, the tighter the chemical pump ring seal diagram, the better. In fact, moving ring seal ring too tight harmful. One is to aggravate the wear between the sealing ring and the shaft sleeve, premature leakage; Second, it increases the resistance of axial adjustment and movement of the moving ring of the mechanical seal of fluorine plastic chemical pump, which can not be adjusted timely when the working condition changes frequently; Three is the fluorine plastic chemical pump mechanical seal spring overfatigue easy to damage; Fourth, the moving ring sealing ring deformation, affect the sealing effect. 3, chemical pump static ring seal ring, the tighter the better. Static ring sealing ring is basically in a static state, relatively close sealing effect will be better, but too tight is also harmful. One is caused by excessive deformation of static ring seal, affecting the sealing effect; Second, static ring material with graphite in the majority, generally more brittle, excessive stress is easy to cause fragmentation; Third, it is difficult to install and disassemble, and easy to damage the static ring. 4, chemical pump impeller lock the tighter the better. Mechanical seal leakage, the leakage between the shaft sleeve and shaft (shaft leakage) is more common. Is generally believed that fluorine plastic chemical pump shaft leakage is between the impeller lock the mother didn't lock, actually lead to leakage of the shaft between many factors, such as axial failure, migration, contains impurities between shaft, shaft and shaft sleeve with larger shape error, contact surface damage, fluorine plastic chemical pump shaft have clearance between components, shaft thread is too long can lead to leakage between shaft. Excessive locking of the lock mother will only lead to premature failure of the inter-shaft gasket, on the contrary, properly locking the lock mother, so that the inter-shaft gasket always maintain a certain compression elasticity, in the operation of the lock mother will automatically timely locking, so that the shaft is always in a good sealing state. The new is better than the old. Relatively speaking, the effect of using the new mechanical seal is better than the old, but the quality or material selection of the new mechanical seal is not right, the size error of the mechanical seal will affect the sealing effect; Fluorine plastic chemical pump in the cohesive and permeable medium, static ring such as no excessive wear, or do not replace the best. Because the static ring is in a static state for a long time in the static ring seat, the polymer and impurity deposition as a whole, has a better sealing effect. Demolition repair is better than no demolition. Once there is mechanical seal leakage, it is urgent to disassemble and repair. In fact, sometimes the seal is not damaged, and the leakage can be eliminated only by adjusting the working condition or properly adjusting the seal. In this way, it can not only avoid waste but also verify their fault judgment ability, accumulate maintenance experience and improve maintenance quality.