Flowserve APKD - Manual (Page 37)

APKD DOUBLE-CASE, DOUBLE-SUCTION USER INSTRUCTIONS 26999903 07-13
Page 37 of 55 flowserve.com
All adjustments of the impellers will
change the seal setting, therefore, the seal must be
loosened from the shaft until the adjustment is
completed and then reset.
6.2.5
Maintenance of the stuffing box
6.2.5.1 General
Maintenance of the stuffing box will consist of
greasing the box when required, tightening the
packing gland occasionally as the leakage becomes
excessive, and installing new packing rings or sets
as required.
6.2.5.2
Greasing the stuffing box
Under ordinary operation, once-a-month greasing of
the stuffing box will be adequate. A high quality
industrial grade # 2 grease is recommended; see the
table below for typical brands and types.
Manufacturer Grease types
Exxon Unirex N2
BP Energrease LS2
Mobil Mobilux 2
Shell Alvania No.2
Texaco Multitak 20
Esso Beacon 2
6.2.5.3 Replacing
packing
Remove gland and all old packing. If the box
contains a lantern ring, remove this and all packing
below it using two long threaded machine screws.
Inspect shaft or sleeve for score marks or rough
spots. Be sure by-pass holes (if supplied) are not
plugged. Repair or replace badly worn shaft or
sleeve.
If wear is minor dress down until smooth and
concentric. Clean box bore.
Oil inside and outside of replacement rings lightly
and install in box, staggering joints 90 degrees. Be
sure to replace lantern ring in proper position when
used.
Replace gland and tighten nuts finger tight. The
packing gland must never be tightened to the point
where leakage from the packing is stopped.
A small amount of leakage is required for packing
lubrication.
Packing ring sizes vary with the shaft diameter.
Packing ring size information are as follows.
PACKING RING SIZES
Packing Dimensions
Shaft size Packing ring size Outside diameter of
packing
mm (in.) mm (in.) mm (in.)
25 (1.00) 9.65 (0.38) 44.4 (1.75)
32 (1.25) 9.65 (0.38) 50.8 (2.00)
38 (1.50) 11.17 (0.44) 60.4 (2.38)
43 (1.69) 12.70 (0.50) 68.3 (2.68)
49 (1.93) 12.70 (0.50) 74.6 (2.93)
56 (2.20) 12.70 (0.50) 81.0 (3.19)
62 (2.44) 12.70 (0.50) 87.3 (3.43)
68 (2.68) 12.70 (0.50) 93.7 (3.69)
75 (2.95) 12.70 (0.50) 100.0 (3.93)
82 (3.22) 12.70 (0.50) 107.9 (4.24)
89 (3.50) 15.74 (0.62) 120.6 (4.74)
95 (3.75) 15.74 (0.62) 127.0 (5.00)
102 (4.00) 15.74 (0.62) 133.3 (5.24)
114 (4.50) 15.74 (0.62) 146.0 (5.74)
6.2.5.4
Startup with new packing
Check to see that the by-pass line (if used) is
connected and the packing gland is loose. Start
pump and allow it to run for 20 to 30 minutes. Do
not tighten the gland during this "run-in" period
even if leakage is excessive. Should the new
packing cause excessive heating during "run-in",
flush the shaft and packing box area with cold
water or shut the pump down and allow to cool.
For all repair instructions please call
Flowserve representative or customer service with
the order no. and unit details for specific repair
instruction literature.
All repair work to be carried out by trained and
authorized personnel only. Flowserve’s written
permission may be required for any
disassembly/repair of the pump that is still under
warranty.
6.3 Spare parts
6.3.1 Ordering of spares
Flowserve keep records of all pumps that have
been supplied. When ordering spare parts we
need the following information: