Flowserve APKD - Manual (Page 30)

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13
Page 30 of 55 flowserve.com
Note and record the T.I.R. reading. If this
reading is more than 0.25 mm (0.010 in.) for WA
and WSA couplings or 0.15 mm (0.006 in.) for
PA and PSA couplings, unbolt the drive and
reposition the driver in the direction required to
reduce the T.I.R. to within the allowable limits.
If a register fit is used for alignment,
driver will be able to be moved only a few
thousandths of an inch. If enough movement is
not obtainable then the male register can be
filed to obtain acceptable T.I.R. readings (Go to
step g).
f) On pumps using jackscrews for motor
alignment, mount the dial indicator base on the
O.D. of the motor half coupling. Set the
indicator on the shaft, position the dial to zero
being careful that the indicator is in direct line
with one of the jackscrews. Record this reading
then rotate the motor shaft and indicator 180
degrees.
Record this reading being careful to note plus or
minus values. Take the difference of the two
readings and using the jackscrews move the
motor one half of the difference. Repeat this
step until the T.I.R. reading is a maximum of
0.05 mm (0.002 in.).
Then repeat this step for the set of jackscrews
located 90 degrees to the first set. Once all
readings are within 0.05 mm (0.002 in.) tighten
motor bolts and check for any movement in
readings.
g) Set the impeller setting gap between the
adjusting nut and the driver portion of the
coupling. See impeller setting data supplied
along with the pump. If this information is not
found, contact Flowserve. Align the match
marks on the pump half coupling with the driver
half coupling. On pumps with enclosed
impellers the match marks can be lined up by
increasing the impeller gap until the marks are
in line with the driver half coupling marks.
h) Using 2 bolts of the coupling, at 180 degrees to
each other, slowly raise pump half coupling until
impellers are just lifted off the seat (This can be
gauged by trying to turn shaft by hand. At the
point the impellers are lifted the pump will turn).
Be sure to lift both sides evenly.
i) Measure the resultant gap between the motor
half coupling and the adjusting nut.
j) Find the difference between the original gap and
the new gap. Add this difference to the original
gap and reset the adjusting nut.
k) Bolt the coupling together and tighten bolts by
tightening opposite sides.
l) Remove wooden wedges, if used. Mount
magnetic base on pump and set the tip of
indicator on the shaft just above the seal.
Slowly rotate the shaft and note the T.I.R.
reading.
Unless otherwise specified, the allowable T.I.R.
readings are:
 WA and WSA couplings 0.10 mm (0.004 in.)
 PA and PSA couplings 0.05 mm (0.002 in.)
If the reading is larger than the allowable values
specified above, unbolt the pump and rotate the
driver portion of the coupling to different hole and
repeat steps (h) and (i) until acceptable readings are
obtained.
m) If a mechanical seal is used, adjust the
mechanical seal at this time.
5.4 Direction of rotation
Ensure the pump is given the same
rotation as specified or as marked on the
pump/driver. Please contact Flowserve
representative, if you have any questions before
the startup.
To avoid dry running the pump must either be filled
with liquid or have the flexible coupling
disconnected before the driver is switched on.
If maintenance work has been
carried out to the site's electricity supply, the
direction of rotation should be re-checked as above
in case the supply phasing has been altered.
5.5 Guarding
Guarding is supplied fitted to the pump set.
Fasteners for guards must remain captive in the
guard to comply with the Machinery Directive
2006/42/EC. When releasing guards, the fasteners
must be unscrewed in an appropriate way to ensure
that the fasteners remain captive. Whenever
guarding is removed or disturbed ensure that all the
protective guards are securely refitted prior to start-up