Flowserve 800 Split-Wedge Gate Valve - Manual (Page 12)

12
9.0 MAINTENANCE INSTRUCTIONS (Continued)
9.2 Replacement of Packing (Reference Figure 1)
If the valve is in service, backseat it. If the valve is not backseated, be sure that line is depressurized.
(Refer to Figure 1 for referenced part designations.)
(a) Remove the two (2) gland stud nuts (234), loosen the two (2) gland retainer setscrews (220) and raise the
gland flange (133).
(b) Lift the gland flange (133) upward and away from the stuffing box area.
(c) Use a packing hook or similar device to remove the old packing.
(d) Install the packing (110, 112) one ring at a time, carefully placing the joint of each ring approximately 180°
from the preceding piece to prevent a leakage path. It might be necessary to slightly flatten each packing
ring prior to installation to allow easy insertion within the stuffing box. Do not use a pointed instrument to
push the rings into position. The gland flange (133) can be used to seat the packing in position once a ring
has been slipped within the box.
(e) Upon completely filling the stuffing box, replace the nuts and bolts and very carefully draw the packing to
assure that the gland flange (133) is even and that the bore of the gland flange is concentric with the valve
stem. If the gland flange (133) is drawn unevenly, scoring of the stem (025) could result; or the gland
flange could be tilted, which could cause binding. Recommended torque values can be found in
Section 11.0.
(f) Check the packing periodically (six-month intervals), replacing as needed.
800-lb. Split-Wedge Gate Valves FCD ADENIM0002-00