Flowserve Pac-Seal Type 16 - Manual (Page 5)

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2.4 Lubricate inner diameter (ID) of the rotating seal head elastomer
bellows with Pac-Ease. Note: Any oil, Grease, assembly lubricant
fingerprints, or other residue from the installation process can cause
the seal to leak.
2.5 Clean both rotating and stationary seal faces with a lint free rag
and isopropyl alcohol. Note: Any oil, grease, assembly lubricant,
fingerprints, or other residue from the installation process can cause
the seal to leak.
2.6 Slide the rotating seal assembly by hand along the shaft to a
completely parallel contact with the stationary seat. Apply pressure
to the back of the metal shell and elastomer bellows. Applying
pressure to both the back of the metal shell and elastomer bellows
is important to minimize stretching of bellows on the shaft relative
to rotating seal head. Avoid extreme installation pressure or
hammering of the seal.
2.6.1 For back-first installations apply pressure to the outer
diameter of the seal. Whenever possible even pressure
should be applied to the outer diameter of the seal face,
bellows, and outer shell to provide proper installation.
Care should be taken not to apply pressure directly to
the sealing surface of the seal face to avoid any possible
damage. Press the assembly until the back side of the
elastomer bellows is flush and parallel to the equipment.
Clean both rotating and stationary seal faces with a lint
free rag and isopropyl alcohol. Note: Any oil or grease on
the seal faces may cause the seal to leak.