Mechanical seal the long run, the ring and static ring face wear and tear caused due to friction, springs and bushings corrosion or damage will occur, ring deformation and loss of elasticity due to aging, all of which would result in mechanical seal leakage. Therefore, after a long period after the operation, mechanical seal components for replacement or repair to, to re-use purposes.
1, ring and static ring end face grinding
After the ring removed by grinding, coarse first study, after lapping, polishing conditions can be.
Rough grinding, the use of abrasive particle size 80-160 #, first wore off processing traces. 160 # above and then used for grinding abrasive to finish up the design requirements. Carbide or ceramic ring after fine grinding polishing machine polishing needed. Polishing machine can choose the intensity of M28-M5 of boron carbide. Polished to mirror. M5 can be used agate ring ceramic powder after grinding, polishing with chromium oxide.
Static ring of PTFE filled with graphite, due to the soft material can be used kerosene, gasoline or water lapping, no added abrasive. In the running-in process can also self-development, it is not too high finish demands.
Grinding method, a grinding machine for grinding machine in grinding, no grinding machine can be flat on the 8-shaped hand-grinding method.
2, sleeve check
Remove the sleeve after the overhaul inspection of corrosion and wear, and if corrosion or wear was relatively minor, can be used fine sandpaper then polish, if severe corrosion or wear and tear after the plating process can use the method or replacement sleeve.
3, ring
Ring after a period of use of time, in most cases loss of elasticity or aging, in general, need to replace the new ring.
4, Spring
If the spring corrosion is not serious, can maintain the original flexibility, from time to change. If the corrosion of the more serious or much reduced flexibility, you need to replace the new spring.
Box on a mechanical seal assembly, to clean up the box and check the grooves are worn or deformed, for correction of repair, re-grooving or replaced.
Mechanical seals repair after re-assembly, assembly pressure test carried out after the same, and then put into normal operation.