1. Check the mechanical seals whether accord with the requirement of design drawings, specifications, all parts (especially the sealing surface, auxiliary seal ring) with and without damage, deformation, cracks and other phenomena, if flawed, and must be replaced or repaired.
 
2. Check the mechanical seal parts fit size, roughness, parallelism, meets the design requirements.
 
3. Using a small spring mechanical seal, it shall check the length of the small spring and rigidity are the same.
 
4. Check the host up momentum, momentum and deflection is in line with the technical requirements, the seal chamber is in line with the installation size, sealing cover and shaft is vertical, general requirements: axial channeling momentum is not more than + / - 0.5 mm;Axis throwing (rotating seal) is not greater than 0.06 mm;Axis maximum deflection is not greater than 0.05 mm;Sealing cover and gasket contact surface is not perpendicular to the centerline to allow poor 0.03 ~ 0.05 mm.
 
5. Should be kept clean, especially the rotating ring and static ring sealing surface and auxiliary seal surface should be without impurities, dirt.Not allowed to use clean cloth to wipe seal face.
 
6. Allow tapping packing element with tools, in order to prevent the mechanical seals is damaged.

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