How To Judge The Quality Of The Mechanical Seal Of A Sanitary Rotary Cam Pump

How to judge the quality of Sanitary Rotary Lobe Pump mechanical seal? The answer is given from the following points.
1. The greater the compression of the spring of the mechanical seal of the sanitary rotary cam pump, the better the sealing effect. In fact, too much spring compression can cause rapid wear and instant burning of the friction pair; excessive compression makes the spring lose the ability to adjust the end face of the dynamic ring, resulting in seal failure.
2. The tighter the dynamic ring seal of the mechanical seal of the sanitary rotary cam pump, the better. In fact, too tight a dynamic ring seal is harmful rather than beneficial. First, it aggravates the wear between the seal ring and the sleeve, causing premature leakage; second, it increases the resistance to axial adjustment and movement of the dynamic ring, and cannot be adjusted in time when the working conditions change frequently; third, the spring is easily damaged due to excessive fatigue; fourth, the dynamic ring seal is deformed, affecting the sealing effect.
3. The tighter the static ring seal of the sanitary rotary cam pump, the better. The static ring seal is basically in a static state, and the sealing effect will be better if it is relatively tight, but too tight is also harmful. First, it causes excessive deformation of the static ring seal, affecting the sealing effect; second, the static ring is mostly made of graphite, which is generally brittle and can easily break under excessive force; third, it is difficult to install and disassemble, and it is easy to damage the static ring.
4. The tighter the lock nut of the impeller of the sanitary rotary cam pump, the better. Among mechanical seal leakage, leakage between the sleeve and the shaft (inter-shaft leakage) is more common. Excessive tightening of the lock nut will only cause the inter-shaft gasket to fail prematurely. On the contrary, moderate tightening of the lock nut will keep the inter-shaft gasket always in a certain compression elasticity. During operation, the lock nut will automatically lock in time to keep the shaft in a good sealing state.
5. The new sanitary rotary cam pump is better than the old one. Relatively speaking, the effect of using a new mechanical seal is better than the old one, but if the quality or material of the new mechanical seal is not selected properly, the large size error will affect the sealing effect; in polymeric and permeable media, if the static ring is not excessively worn, it is better not to replace it. Because the static ring is in a static state in the static ring seat for a long time, the polymer and impurities are deposited as one, which plays a better sealing role. 6. It is better to dismantle the sanitary rotary cam pump than not to dismantle it. Once the mechanical seal leaks, people are eager to dismantle it. In fact, sometimes the seal is not damaged, and the leakage can be eliminated by adjusting the working conditions or adjusting the seal appropriately. This can not only avoid waste but also verify your own fault judgment ability, accumulate maintenance experience and improve the quality of maintenance. Therefore, the seal plays a key role in the sanitary rotary cam pump.