Flowserve V-377 R4 Edward Valves - Manual (Page 20)

20
Flow Control Division
Edward Valves
Non-Ball Bearing Type Impactor
Handles and Handwheels
All have 12, 14, 16, 20, 26, or 30 inch
diameters. See Illustrations No. 10, 11,
and 12 on this page.
These handwheels are of relatively simple
design and utilize fewer parts than the ball
bearing type. (Not to be confused with ball
bearings in the valve yoke.) Not illustrated,
but of similar construction to Illustration
No. 10 on this page, are Impactor han-
dles. The following instructions apply, in
general, to all non-ball bearing types.
1. Remove the handwheel locknut,
which is the uppermost part on the
top of the valve stem. On some
designs, it is a friction device and is
merely unscrewed. On others, a roll
pin must first be driven out. On
another design, a small lock screw
must be unscrewed.
2. Mark the relative position of the hand-
wheel and cross arm so the original
relationship can be restored when
reassembling. If this is not done, the
handwheel could be reassembled
180° out of the original position.
3. Lift the handwheel off the valve, using
a suitable capacity chain hoist for
large handwheels. If the stem of the
valve is mounted vertically, position
the hoist directly above the hand-
wheel. Otherwise, the hoist should be
positioned slightly away from the
handwheel in line with the stem.
4. Crossarm Removal: For all valves
being serviced in Area I or revolving
stem valves in Area 2, the crossarm
can be removed by tapping lightly
with a hammer on the underside. If
the crossarm is keyed to the yoke
bushing, as in non-revolving stem
valves, the handwheel bushing is first
removed by unscrewing the cap
screws holding the handwheel bush-
ing to the handwheel, and then
unscrewing the handwheel bushing
from the yoke bushing. The keyed
crossarm can now be removed by
tapping the underside with a hammer
and lifting off.
Illustration No. 12
Impactor Handwheel
Non-Ball Bearing Types
Illustration No. 11
Impactor Handwheel
Non-Ball Bearing Types
Illustration No. 10
Impactor Handwheel
Non-Ball Bearing Types
CROSSARM
ROLL PIN
HANDWHEEL LOCKNUT
HANDWHEEL LOCKNUT
ADAPTER (EQUIVALENT
TO CROSSARM
IMPACTOR
HANDWHEEL
IMPACTOR
HANDWHEEL
IMPACTOR HANDWHEEL
VALVE YOKE BEARING
HANDWHEEL LOCK NUT
LOCKSCREW
HANDWHEEL BUSHING
CROSSARM
KEY
Disassembly Procedures for Impactor Handles & Handwheels