Flowserve Pac-Seal Type 21 - Manual (Page 4)

1.5 Thoroughly inspect and clean the seal chamber and shaft or pump
sleeve. Inspect for corrosion or any defects. Remove all burrs, cuts,
dents or defects that might damage gaskets or allow a leak path.
Replace worn shaft or pump sleeve.
1.6 Check equipment requirements as described in Figure 2. Any
measurement different than what is allowed must be brought within
specifications.
1.7 Handle the seal with care; it is manufactured to precise tolerances.
The seal faces are of special importance and should be kept
perfectly clean at all times.
2 Type 21 and Type 31 Installation
2.1 Lubricate the shaft or sleeve lightly. Use a water-based lubricant
(Pac-Ease recommended). If Pac-Ease is not available use a
solution of liquid dish soap in water as lubricant. Note: Never use
grease or oil as an installation lubricant. Oil used to lubricate the
elastomer bellows/cup gasket will significantly reduce the friction
drive or anti-rotation capability of the component.
2.2 Lubricate the outer diameter (OD) of the stationary elastomer cup
gasket or O-ring with Pac-Ease.
2.3 Press the stationary seal seat firmly into counter bore ensuring it is
bottomed out and squared to the shaft. This can be hand-pressed
or machine-pressed into place taking care to protect the sealing
face from direct contact with any metal object. Use a piece of plastic
between the face and the press or a plastic installation tool when
using a press to install the seat. Additional care must be taken
during the stationary seat assembly to assure the O-ring or cup
gasket is not cut.
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