Mechanical seal for kettle Technical requirements during installation

Mechanical seal is a high precision mechanical part, which has a great impact on its correct device and operation and its service life. We generally follow the standards of the Ministry of Petrochemical Industry.

The skill requirements for the cooperation between the pump and mechanical seal of the device mechanical seal are as follows:

1. Shaft bending:. not more than 0.05 mm;

2. Rotor runout: the shaft sleeve adjacent to the dynamic ring seal ring shall not be greater than 0.06 mm;

3. The axial displacement of the shaft is not allowed to exceed ± 0.5mm. If there is a shaft sleeve, it is not allowed to loose the shaft sleeve;

4. Alignment error of coupling: not more than 0.08~0.10mm for gear coupling (P2008C), not more than 0.05~0.06mm for elastic coupling; (customary end jump<0.05, radial jump

5. The concentricity tolerance of the shaft centerline of the gland (stationary ring seat) and seal joint lip is 0.05 mm, and the perpendicularity tolerance of the plane near the centerline in contact with the gasket is 0.03~0.05 mm. If the requirements cannot be met, the seal cavity should be processed;

6. The shaft sleeve end of the device moving ring seal ring and the gland (or shell) end of the device stationary ring seal ring shall be chamfered and smoothed.

1. Be careful when installing and disassembling the mechanical seal. Do not use a hammer or flat shovel to avoid damaging the sealing elements. If scaling cannot be removed, it shall be cleaned before removal.

2. If mechanical seals are used at both ends of the pump, take care of each other during assembly and disassembly to avoid overstretching.

3. For the working mechanical seal, if the gland is loose and the seal moves, the moving and stationary ring parts must be replaced and should not be tightened again for further use. Because the working track of the conflict copy will change after loosening, the sealing of the contact surface will be easily damaged.