18 | Baker Hughes
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4.4 Remove the Adapter Housing Cap Screws and lift the
Adapter Housing using the provided lifting holes.
4.5 Remove the Upper Crush Gasket and lift the Cage from
the Body. Clean and inspect the Cage for any sign of
abrasive wear or damage.
4.6 Remove the Seat Ring and Lower Crush Gasket. Inspect
the Seat Ring for any sign of abrasive wear or damage.
Replace if necessary. Due to the close fit between the
Seat and Cage, the Seat may require prying to remove it
from the cage.
4.7 Insert Lower Crush Gasket.
Note: The two Crush Gaskets are not re-usable and
must be replaced if the Adapter Housing is removed
during teardown and reassembly.
4.8 Insert the Seat Ring, Cage and Upper Crush Gasket.
4.9 Position the Adapter Housing in place on top of the
Upper Crush Gasket and install Cap Screws.
Note: The torqueing of the Adapter Housing Cap
Screws is critical to setting the Upper and Lower
Crush Gaskets and must be done in an even
crisscross manner to provide even force for setting
the gaskets. Torque should be applied in intervals of
1/3 the final torque, 2/3 final torque and final torque.
4.10 Torque Adapter Housing Cap Screws to specified levels
(see Table 5).
4.11 Prior to reinstalling the Actuator assembly onto the
Adapter Housing, clean and inspect the Adapter Housing
O-ring as noted in the figure below. Replace if necessary.
4.12 Apply Parker O-lube to the Plug Seal and the Adapter
O-ring prior to lowering the Actuator into position.
4.13 While lowering the Actuator housing, care should be
taken to assure that the unit is centered and that the Plug
Seal slides properly into place as the unit is lowered.
4.14 The inner diameter of the Adapter Housing has a slight
taper which acts to compress the Plug Seal as it slides
into place.
4.15 A slight clicking sound can be heard as the Plug Seal
transitions from the Adapter Housing into the valve Cage.
4.16 Once the Actuator is properly seated, the Cap Screws
can be re-installed and torqued to specified levels (see
Table 5). Always torque the Cap Screws in a crisscross
pattern.
4.17 Reconnect the Inlet, Sense and Loading tubing.
4.18 Pressure test for leaks prior to returning to service.
