7 | Baker Hughes
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G. Install body gasket (22).
Note: Spiral wound body gaskets (22) are standard in
the 500 Series design. It is imperative that a new gasket
be installed each time the valve is disassembled.
H. Assemble bonnet (10) and body stud nuts (21). Bonnet must
be positioned so the packing flange studs are at 90° to the
flow center line.
Tighten nuts (21) until metal to metal contact is
obtained with proper bolt torque. Refer to Table 1 for
properbolttorqueandtighteningsequencespecifica
-
tions.
I. lnsert packing (16) (and lantern ring (17) on valves equipped
with an optional lubricator connection). Refer to Section 8.5
for proper packing assembly procedure for standard or
optional designs.
J. Install packing follower (12) and packing flange (13).
K. lnstall packing flange stud nuts (15).
Do not over tighten (See Section “8.5. Packing Box”).
L. If a leak detection connection was installed, connect it on
the lateral NPT port in the bonnet. If not, insure that the 1/4”
NPT plug remained in place (Figure 2).
M. For actuator assembly and plug stem adjustment, proceed
as per the Instruction Manual 31593 for 10900 Series
Actuators.
9. Actuators
9.1 Type 10900 Actuators
Refer to Instruction Manual 31593 for removal, maintenance,
assembly and adjustment.
Figure 1a: Typical Reducing Application
Figure 1b: Typical Back Pressure Application
Figure 2: Lubricator Connection (Optional)
Figure 3: Seat Lapping Device
