Flowserve ST Series - Manual (Page 6)

Shoulder screws 57.2 are designed to hold the rotating portion
of the seal in proper position to the stationary housings during
installation. These screws must not be turned until at least one
allen screw 57 has been set firmly to the shaft. Once at least one
57 allen screw has been firmly set to the shaft shoulder screws
57.2 may be removed, and if necessary the shaft can be rotated
by hand to align the remaining allen set screws to the opening for
tightening.
Dog point set screw 57.1 should never be removed. The only job
this screw does is attach the sleeve collar to the sleeve. Those
screws will never engage the shaft and must not be backed out
of their threaded hole.
The screws may be numbered with different numbers, but the
procedure is similar.
There may be special custom installation instructions for your
seal on the face of the assembly drawing.
2.1.7 Inspect your installation. At this point use any visual method
possible to insure that the seal is positioned axially and radially
in the correct position according to the assembly drawing.
2.1.8 Attach piping to the seal. Referring to Figure 1 insure that the
barrier fluid flow and pressure is injected into the barrier inlet (BI)
and that the barrier outlet (BO) is connected to proper piping to
carry away the barrier fluid after it passes through the seal cavity.
2.1.9 Ensure that the barrier fluid cavity is filled with water before
operating the shaft. The condensate works as a lubricant to the
upper and lower seal face sets and without being properly wetted
they will squeal loudly, or possibly even destroy themselves.
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