Flowserve 1888 Parallel Slide Gate Valve - Manual (Page 10)

(j) Place the gland bolts (210) into the slots and through the
flange gland (133) and tighten the gland stud nuts (234) (see
Section 11.0)
(k) Replacement of the yoke (011), yoke sleeve (017), thrust
washer (147), tee handle (175) and handwheel nut (240) can
be accomplished by reversing the procedure specified in Para
9.1.1 (a), (b), (c), (d), (e), (f)
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) and raise the Gland
Flange (133) allowing the Gland Bolts (210) to be removed.
(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) may result; or the Gland Flange might be tilted
which could cause binding. Recommended torque values can be
found in Section 11.0.
(f) Check the packing periodically (6-month intervals) replacing as
needed.