Flowserve Single Inside Pusher Type Seal - Manual (Page 6)

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4.2 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 seal
spring holder will be located at this point.
4.3 Lubricate the shaft or sleeve lightly with silicone lubricant provided
with the seal before installing any seal parts.
4.4 Install the rotating seal components into the bore of the rotating
face.
4.5 Install the rotating seal component parts 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 in the rotating face. Avoid nicking or pinching
either lip of the U-cup ring. Use both U-rings, they work together to
form an effective seal.
4.6 Set the back of the spring holder at reference mark B, Figure 1,
and tighten set screws firmly and evenly. In cases where the spring
holder is provided with drive slots to engage with the pins there are
no set screws to tighten. Install the rotating components over the
shaft or sleeve and into the bore of the seal housing being sure the
slots in the spring holder engage the drive pins. The rotating
component assembly is now in the proper position to provide the
correct setting and spring compression for final assembly.
4.7 Lightly lubricate O-ring or Duraflex stationary face mountings.
4.8 Press the stationary face into the gland (flexibly mounted 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 stationary face into
the nested O-ring.
4.9 Wipe the seal faces clean with alcohol before completing
equipment assembly. Seal faces should not be lubricated,
but should be left clean and dry.
4.10 Position the gland to the face of the seal housing. Be sure the
gland pilot is properly engaged. Tighten the gland stud nuts
evenly, cross stagger the adjustment of the nuts. Follow the
equipment manufacturer's recommendations for gland stud nut