Flowserve Durametallic Double CRO - Manual (Page 3)

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1.7 Check gland pilot and bolt holes to ensure they are adaptable
to the equipment and are the same as shown on the assembly
drawing.
1.8 Handle all seal parts with care, they are manufactured to precise
tolerances. The seal faces; rotating face and stationary face, are
of special importance. These two sealing faces are lapped flat to
within three light bands (34.8 millionths of an inch).
Keep the seal faces perfectly clean at all times.
1.9 Do not use oil or silicone lubricant on the shaft or sleeve of this
friction driven seal. Use water or a mild water soluble soap solution
to ease installation.
2 Installation on Single End Suction Vertical Split Case
and Vertical In-Line Pumps (1 seal chamber)
2.1 Lubricate one of the two stationary face seat gasket O-rings
with water or mild water soluble soap solution and nest this O-ring
in the gland cavity. Press the stationary face into the gland
with the sealing face orientated toward the inboard side of the
gland. Use hand pressure only. Position the gland over the shaft
or sleeve with the sealing face orientated toward the seal chamber
(stuffing box). Place the gland as close to the bearing bracket as
possible. Do not bump the stationary face against the shaft as it
may chip, crack, or break.
2.2 Lubricate the shaft or sleeve with water or soap solution.
2.3 Install the rotating seal parts on the shaft or sleeve one piece
at a time:
• Outer rotating face with rotating face gasket O-ring.
• Single coil spring.
• Inner rotating face with rotating face gasket O-ring.
The rotating seal parts should be as close to their final axial position as
possible with the rotating face sealing surfaces facing away from the
spring and toward the stationary face sealing surfaces.
2.4 Lubricate the seal chamber bore with water or soap solution.
The seal chamber is usually the stuffing box contained in the
pump back plate.