Flowserve V-377 R4 Edward Valves - Manual (Page 28)

28
Flow Control Division
Edward Valves
Revolving Stem Valves – Valves with
Type II Bonnets
See Illustration No. 22 on page 30.
1. The manual or Limitorque operator
must first be removed in accordance
with instructions on pages 19 or 22.
2. Mark the body and yoke with prick
punch marks so that the parts are ref-
erenced for reassembly.
3. Loosen the gland stud nuts.
4. Remove the yoke stud nuts.
5. Lift the yoke and stem to clear the
studs, and spin the yoke completely
off the stem.
6. The yoke bushing can be removed
from the yoke by breaking the tack
welds on the flats and unscrewing.
Non-Revolving Stem Valves –Valves
with either Type II or III Bonnets
See Illustrations No. 23 on page 31, and
Illustration No. 24 on page 34.
1. The manual or Limitorque operator
must first be removed in accordance
with instructions on pages 19 or 22.
2. Mark the body, yoke, and yoke lock
ring with prick punch marks so that the
parts are referenced for reassembly.
3. Make certain the packing gland nuts
are tight.
4. Remove the yoke lock ring studs and
nuts.
5. Remove the yoke lock ring using a
small pry bar to separate the halves.
6. Loosen the stem guide collar lock nut,
back off the stem guide collar lock
screw and remove the stem guide col-
lar key. Lift the collar to the top of the
stem.
7. Turn the crossarm in a direction to
close the valve, thus unscrewing the
yoke assembly from the stem.
8. If the valve is installed with its stem
other than vertical, a chain hoist will
have to be attached to the yoke to
allow the parts to turn freely.
9. With the hoist, lift the yoke assembly
clear of the stem and body assembly,
simultaneously slipping the stem
guide collar off of the stem.
10. Set the yoke assembly down on its
side and remove the hoist.
11. Disassembly of the yoke assembly
itself is as follows:
a. Remove the crossarm as explained
under “Disassembly Procedure for
Impactor Handles and Hand-
wheels,” step 4, on page 20, or
step 5 on page 21. Be careful that
the yoke bushing does not drop
out of the yoke and bearings.
b. Prepare a bed of clean rags or
paper for the bearings and yoke
bushing.
c. While holding the yoke bushing,
place a clean wood block over the
top and tap to drive the yoke bush-
ing out of the bearings or yoke.
d. Remove the bearing washers (if
any) and the bearings from the
yoke or yoke bushing, being very
careful not to contaminate the
grease with dirt of any kind. Keep
the bearings protected.
Valves with Type IV Bonnets
See Illustration No. 27 on page 39.
It is possible to remove the operator and
yoke assembly as a unit on Type IV
bonnets, but then it is not possible to dis-
assemble the valve bonnet since use of the
yoke is required. Therefore, only “Method
2” is recommended for disassembly of
Type IV bonnets. See page 19.
Disassembly Procedure for Yoke Assemblies
(continued)