Flowserve V-377 R4 Edward Valves - Manual (Page 23)

23
Flow Control Division
Edward Valves
4. Lift the operator up and completely
off the stem and stem key or the yoke
bushing splines.
5. Position the operator away to a clean
area for further disassembly, if
required.
Non-Revolving Stem Valves with
Torque and Thrust Units
See Illustration No. 17 on this page.
1. Disconnect the electrical wiring to the
operator.
2. Make certain the packing gland nuts
are tight.
3. Position a chain hoist of suitable
capacity so the operator is supported
in such a manner that the handwheel
can still be rotated. If the valve is
installed with its stem other than
vertical, the hoist should be posi-
tioned slightly away from the hand-
wheel in line with the stem.
4. Remove the nuts from the underside
of the yoke flange.
5. Turn the operator handwheel in a
direction to close the valve, thus
unscrewing the operator from the
stem. Try to keep the weight on the
hoist as the handwheel is turned.
6. With the hoist, lift the operator clear
of the stem and place down on a
clean area for further disassembly, if
required.
Procedures for Removing Limitorque Operators from Valve Yokes
(continued)
Torque and Thrust Limitorque Operator on
Non-Revolving Stem Valve