Mechanical seal issue

Not necessarily; it depends on what the medium inside the axe and the sealing fluid is. Sometimes, in order to prevent the sealing fluid from contaminating the medium inside the tank, a relatively low pressure for the sealing fluid is required

Reply to 2# qingsg1: Thank you, user number 2. What I’m more interested in knowing is whether the sealing capability between the stationary and rotating rings also decreases if I reduce the pressure of the sealing fluid (the pressure inside the axe is 18 KG, while the pressure of the sealing fluid inside the mechanical seal is 20 KG)； Can I reduce the sealant pressure to 15 KG or even lower? Sealing fluid leakage is often observed at the dynamic and static rings on the atmospheric side; I would appreciate advice from the experts!

Under normal circumstances, the coolant pressure is about 2 KG higher than that of the medium. If your coolant pressure is low. The seal at the medium side might be pushed open. It is recommended that you not change the original process, but instead find out the cause of the leak at the high-pressure end. There is no leakage at the medium end, and the sealing liquid end is even easier to handle.

If the sealing fluid leaks in a minor amount, what should you do if the liquid inside the tank leaks?

Are you using back-to-back sealing?

If the leakage inside the kettle is severe, the machine seal needs to be replaced. Upon inspection, each issue needs to be analyzed individually; in most cases, it is the O-ring that has been damaged. Next is to observe the friction surface. Many cooling fluids for furnace machine seals use an oil station circulation system. It doesn’t break easily.

Reply to 7# Sealing Cover: Everyone, let me explain in more detail. The machine seals used in our factory are of the double-face, back-to-back type, and they come with separate sealing fluid tanks as well as magnetic pumps for circulation. Nitrogen is used to pressurize these sealing tanks, with a maximum pressure of 20 KG. Usually, within about 3 months of use, leaks start to occur at the dynamic and static rings on the atmosphere side (the sealing fluid is ionized water; if the leakage is severe, it needs to be replaced). However, the pressure inside the seal remains unchanged, meaning there is no leakage at the lower end face. This situation is quite problematic – replacing the seal takes a whole day, which is too time-consuming. Upon disassembly, it was found that the moving ring on the upper surface was worn; everything else was fine. The manufacturer of the materials for both the moving and stationary rings stated that they are made of silicon carbide. Please share your opinions and give some suggestions. Thanks!