15 | Baker Hughes
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Service
Sealant
Lubricant
Diaphragm Glue
Condensate and Steam
Silver Seal T-J, Turbo 50 or HYLO
-
MAR SQ 32
Molykote G or
GRAPHENE 702
3M High Track adhesive
transfer tape (or equal)
Cryogenic
-20°F to -320°F
(-29°C to -196°C)
Crown N. 9008 Teflon Spray
or RODORSIL CAF 730
Crown N. 9008 Teflon Spray
or GRAPHENE 702
3M Pressure sensitive tape, double
coated (or equal)
Oxygen
Drilube type 822 or
BONNAFLON S/9
Drilube type 822 or
OXIGNENOEX FF250
Eastman 910 Cement
(or equal)
All Others(1)
John Crane Plastic lead N.2
HYLOMAR SQ 32
Molykote G or
GRAPHENE 702
Goodyear Plibond Cement
(or equal)
Figure 15
(1) Except Food Services.
I.
Remove handwheel thread plug (48).
Note: If the actuator is equipped with the optional limit
stop (77), in place of the handwheel thread plug, it must
be removed.
Depending on the size and weight of the actuator, it is
recommended that proper lift and support procedures
be utilized when removing the spring barrel or yoke.
J.
Ensure spring barrel is properly supported.
K.
Loosen and remove capscrews (36) and lockwashers (37)
then remove spring barrel (38).
If the orientation of the actuator to valve requires
that the yoke be rotated about the valve, it is recom-
mended that Section 12 on changing yoke position be
accomplished before proceeding.
L.
With the yoke assembled to the valve in the required
orientation, place spring barrel (38) on desired yoke location
and secure with capscrews (36) and lockwashers (37), and
tighten firmly.
M.
Screw in handwheel powerscrew assembly into the
powerscrew hole of the yoke which is on the opposite side
of the spring diaphragm actuator.
Note: Handwheel action is always the same as air
action and opposes the spring.
N.
Replace handwheel washer (51) and Truarc ring (50) and
back off handwheel so the powerscrew will not interfere with
the operation of the lever.
O.
Replace handwheel thread plug (48).
Note: If the valve is equipped with the optional limit stop
(77) instead of the thread plug, it must now be installed,
but ensure it is backed off as not to interfere with the
operation of the lever at this time.
P.
Proceed to Section 11, on Actuator Stem Adjustment.
14. Manual Actuator Option
The manual type actuator is designed to close the valve by
rotating the handwheel in a clockwise direction. Anti-rotation
of the handwheel is obtained through a detente device located
between handwheel (53) and retainer (87).
14.1 Disassembly Procedure
The disassembly procedure for manual actuator is similar to the
procedure for spring diaphragm actuator see Section 8.1.
14.2 Maintenance
Routine maintenance of the manual actuator requires that a
suitable lubricant be periodically applied to the handwheel
powerscrew.
Bearings may require replacement due to service conditions or
corrosion.
The replacement of the handwheel detent mechanism should be
required.
14.3 Reassembly Procedure
There is no specific adjustment for the reassembly of manual
actuator. For details see Figure 21.
