Flowserve Single Inside Pusher Type Seal - Manual (Page 3)

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.
Single Inside Pusher Type Seal Installation
2 Single End Suction Vertical Split Case Pumps (1 box)
2.1 Scribe mark A on the shaft or sleeve to line up with the face of
the seal housing.
2.2 Scribe mark B at the seal setting point shown enclosed in a
rectangular box on the assembly drawing included with the seal.
This seal setting dimension is measured from the face of the seal
housing to the back of the spring holder. The back of the spring
holder will be located at this point.
2.3 Lubricate the shaft or sleeve lightly with silicone lubricant
provided with the seal before installing any seal parts.
2.4 Lightly lubricate O-ring or Duraflex seat gasket.
2.5 Press the stationary face into the gland (flexibly mounted
stationary faces only). Use hand pressure only. Where a face has
an O-ring mounting on the back shoulder, it is usually better to
nest this O-ring into the gland cavity and then push the face into
the nested O-ring.
2.6 Install the gland with stationary face over the shaft. 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.
2.7 Install the rotating face gasket into the bore of the rotating face.
2.8 Install the rotating face components on the shaft or sleeve in
the proper sequence. Handle PTFE U-cup rings and Durafite
rotating face gaskets with extreme care. PTFE U-cup rings must
be assembled individually and not pushed on the shaft or sleeve
while they are installed on the rotating face. Avoid nicking or
pinching either lip of the U-cup ring. Use both U-cup rings, they
work together to form an effective seal.
3