Water pump mechanical seal installation steps and precautions

1. Installation steps and precautions of water pump mechanical seal:
1. The spring compression of the water pump mechanical seal is not allowed to be too large or too small. The error value is ±2.00mm. If it is too large, it will increase the specific pressure of the section and accelerate the wear of the section. If it is too small, it will cause insufficient pressure and cannot play the role of sealing. After the mechanical seal spring is installed, it can move freely in the spring seat. When using it, pay attention to the direction of rotation of the spring. The direction of rotation of the spring should be opposite to that of the pump shaft.



2. After the water pump seal moving ring is installed, it should keep moving flexibly. After pressing the moving ring to the spring, it should be able to spring back automatically.



3. Put the static ring sealing ring on the back of the static ring first, and then put it into the sealing end cover. Pay attention to protecting the section of the static ring of the machine seal, and ensure that the section of the static ring is perpendicular to the center line of the end cover, and align the anti-rotation groove on the back of the static ring with the anti-rotation pin, but do not make them touch each other.



4. During the installation of the mechanical seal, it is forbidden to directly hit the sealing element with tools, and special tools must be used to avoid damage to the sealing element.



5. Apply soapy water or other lubricants when installing the mechanical seal sealing ring to avoid damage to the rubber ring during installation. Apply grease between the dynamic and static sealing surfaces of the mechanical seal to prevent the dynamic and static sealing surfaces of the mechanical seal from being activated by the water pump. front wear.



6. When assembling the floating ring of the mechanical seal, be careful not to touch the spring of the floating ring to avoid affecting the floating performance. After the floating ring is assembled, you can try to press it lightly to confirm whether it has good floating performance.



7. When installing the mechanical seal, handle it with care to avoid damage to the mechanical seal. When installing, clean the mechanical seal and the cavity.



8. When strengthening the mechanical seal of the water pump, the force on the bolts should be uniform to avoid damage to the mechanical seal due to uneven force. For the quick-installation mechanical seal, do not forget to move the positioning piece radially away from the shaft after assembly.



9. Since the media conveyed by different water pumps are different, the media encountered by the mechanical seal are also different. For example, the temperature of hot water and cold water is different, the pressure of the pump body cavity is different, and the corrosion of the medium is different, so the design of the mechanical seal will be different. Different, the process will be different.



10. The mechanical seal is one of the most effective ways of water pump sealing. The machining accuracy of the mechanical seal is relatively high, especially the dynamic and static rings of the mechanical seal. There is also the possibility of damage to the mechanical seal elements.