Flowserve Single Inside Pusher Type Seal - Manual (Page 5)

they are installed in the rotating face. Avoid nicking or pinching either
lip of the U-ring. Use both U-cup rings, they work together to form an
effective seal.
3.6 Set the back of the spring holder at reference mark B, Figure 1,
and tighten set screws firmly and evenly. The rotating component
assembly is now in the proper position to provide the correct setting
and spring compression for final assembly.
3.7 Lightly lubricate O-ring or Duraflex stationary face gaskets.
3.8 Press the stationary face into the gland (flexibly mounted face
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.
3.9 Wipe the seal faces clean with alcohol before completing
equipment assembly. Seal faces should not be lubricated,
but should be left clean and dry.
3.10 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
torque. In the absence of recommendations, gland nuts should
only be torqued to establish a leak tight seal at the gland gasket.
Proper gland bolt adjustment is especially important with clamp
style stationary faces where excessive torque may damage the face.
3.11 Assemble the pump.
3.12 See Operational Recommendations before starting pump.
4 Vertical In-line Pumps
For back pullout designs and shaft designs not incorporating a rigid
spacer coupling use procedure 1, as for single end suction vertical
split case pumps.
For shaft designs incorporating a rigid spacer coupling:
4.1 Scribe mark A on the shaft or sleeve to line up with the face of the
seal housing. Some pump designs incorporate a shaft or sleeve
with vertical or horizontal pins for setting and driving the seal. In
these cases no seal setting measurements are required.
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