1. Precautions during installation
a. Pay great attention to avoid installation deviation during installation
(1) The gland should be tightened after the coupling is aligned. The bolts should be supported evenly to prevent the end face of the gland from deflecting. Check each point with a feeler gauge, and the error should not be greater than 0.05 mm.
(2) Check the fit clearance (that is, concentricity) between the gland and the outer diameter of the shaft or bushing, and make sure that the surrounding area is uniform, and check that the tolerance of each point is not greater than 0.01 mm with a feeler gauge.
b. The amount of compression of the spring should be carried out according to the regulations. 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 be increased, and the end face will be worn at a faster rate. Too small will result in insufficient specific pressure and can not play a sealing role.
c. After the moving ring is installed, ensure that it can move flexibly on the shaft, and it should spring back automatically after pressing the moving ring to the spring.
2. Precautions when disassembling
a. Be careful when disassembling the mechanical seal. It is strictly forbidden to use hand hammers and flat shovels to avoid damage to the sealing elements. A pair of steel wire hooks can be used to extend into the gap of the drive seat in the self-financing direction to pull out the sealing device. If the scale cannot be disassembled, it should be cleaned before disassembly.
b. If mechanical seals are used at both ends of the pump, they should take care of each other during assembly and disassembly to prevent one from losing the other.
c. For the mechanical seal that has been in operation, if the gland is loose and the seal moves, the dynamic and static ring parts must be replaced, and it should not be re-tightened to continue to use. Because after such a movement, the original running track of the friction pair will change, and the sealing of the contact surface will be easily damaged.
