Gear pump mechanical seal shortcomings

1) is more complex, demanding for processing
2) Installation and replacement of cumbersome, requiring workers to have a certain level of technology
3) fortuitous accident occurred when handling more difficult.
Preparatory work before sealing the highest bid:
1) Check the mechanical seal models. Specifications to check whether the requirements of the design drawings, so parts (extraordinary is the sealing surface, secondary seal) for damage. Deformation. Cracks phenomenon, if defective and must be replaced or repaired
2) Check the mechanical seal with the size of the parts, roughness, parallel with the design requirements
3) Using a small spring mechanical vehicle seals should be checked small springs are the same length and rigidity
4) Check the host runout. Swing amount and around the degree of compliance with the technical requirements, the sealed chamber meets the installation scale, sealed cover and whether the axis perpendicular to the general requirements: Shaft runout is less than ± 0.5mm: axis swing amount (rotation ring seal point) is not greater than 0.06mm: maximum around the axis is not greater than 0.05mm: sealing cover gasket contact with the plane on the vertical centerline of the promise is not bad 0.03 ~ 0.05mm.
5) should be kept clean, the extraordinary is the rotating ring and the stationary ring seal surface and the secondary seal surface should be free of impurities. container seal Dust does not agree with unclean loosen the sealing surface.
6) does not agree with the percussion instruments sealing element. To prevent the seal is damaged.