Mechanical Seal Installation and Disassembly Precautions
Mechanical Seal Installation Precautions
Great care should be taken to avoid installation deviations during installation.
The gland should be tightened after the coupling is aligned, and the bolts should be supported evenly to prevent the end face of the gland from being skewed.
Check each point with a feeler gauge, and the error should not be greater than 0.05 mm.
Check the matching clearance (i.e. concentric) between the gland and the outer diameter of the shaft or bushing, and it should be uniform around it
Use a feeler gauge to check that the difference between each point is not more than 0.01 mm.
The spring compression should be carried out in accordance with the regulations, and it is not allowed to be too large or too small, and the error is required to be 2.00 mm.
If it is too large, the specific pressure of the end face will increase and the end face will be worn.
If it is too small, the specific pressure will be insufficient and the sealing effect cannot be achieved.
After the moving ring is installed, it is guaranteed to be able to move flexibly on the shaft. After pressing the moving ring against the spring, it should spring back automatically.
Mechanical Seal Disassembly Precautions
Be careful when disassembling the mechanical seal, and it is strictly forbidden to use a hand hammer and a flat shovel so as to avoid damage to the sealing element.
A pair of wire hooks can be made, which can be inserted into the gap of the transmission seat, and the sealing device can be pulled out. If the scale cannot be removed, it should be cleaned and then removed.
If mechanical seals are used at both ends of the pump, take care of each seal during assembly and disassembly.
For the mechanical seal that has been run, if the gland is loose and the seal moves, the dynamic and static ring parts must be replaced, and should not be re-tightened for continued use. Because after loosening, the original running track will change, and the sealing of the contact surface will be easily damaged.