2. Using a small amount of lubricant, lubricate
lower threads and base guide diameter of
nozzle.
3.
Screw the nozzle into the base, hand tight. For
nozzles with hex flanges, use method A or B.
Nozzles with round flanges, use method B:
a.
Tighten with wrench/socket to a maximum
torque not to exceed that value listed in
Table 10 at the wrench tightening location in
Figure 48.
b. Tighten to a maximum torque not to exceed
that value listed in Table 10 with the use of
the 2900 IS Torqueing Tool Insert per the
drawing in Section XXIII. at the Special
Tightening Tools Only location in Figure 48.
4. Using a small amount of lubricant, lubricate
lower threads and base guide diameter of
nozzle.
5.
Screw the nozzle into the base, hand tight. For
nozzles with hex flanges, use method A or B.
Nozzles with round flanges, use method B:
a.
Tighten with wrench/socket to a maximum
torque not to exceed that value listed in
Table 10 at the wrench tightening location in
Figure 48.
b. Tighten to a maximum torque not to exceed
that value listed in Table 10 with the use of
the 2900 IS Torqueing Tool Insert per the
drawing in Section XXIII. at the Special
Tightening Tools Only location in Figure 48.
Figure 48: IS Nozzle Tightening Locations
B.2.1 Integral Sensing Ring Assembly
1. Attach NPT fitting to Integral Sensing Ring.
2. The included tubing and union fitting shall be
used to connect the Integral Sensing Ring to the
3/8” tubing going to the inlet of the pilot valve.
3. The 1/4” to 3/8” tubing reducer should be
installed to allow the shortest length of 1/4”
tubing required, however, the tubing shall be
long enough to have the fitting outside the Inlet
Flange diameter.
B.3 Disc/Disc Holder Assembly
1.
Assemble the disc/disc holder as follows:
a. Prior to assembly of the Disc into the Disc
Holder, remove the Disc Retainer from the
back of the Disc. Use 1000 grit grinding
compound on the bearing surface to grind
the Disc into the Disc Holder to properly
establish the bearing surface.
b.
For “D” through “U” orifice valves, place the
Disc Retainer into the groove in the disc. The
Disc with the Disc Retainer should “snap”into
the Disc Holder pocket with moderate finger
or hand force. Do not use excessive force to
assemble these parts. Be sure that the Disc
is free to “wobble” after it is in place. For
V and W orifice discs, place Disc into Disc
Holder and secure Disc Retaining Bolts.
C. Assembly Procedure with O-Ring
Seats
1.
If the valve Nozzle was removed, apply thread
lubricant to the nozzle threads before reinstalling
in the Base. Insert it into the inlet flange of the
Base, and torque to the correct value listed in
Table 10.
2.
Assemble the disc/disc holder as follows:
a. For disc sizes “D” thru “J”, reassemble the
Disc Holder using a new O-Ring, O-Ring
Retainer, and new Lock Screw(s). Refer to
Table 11 for the proper torque. These Disc
Holders are ready for the next step.
b. For disc sizes “K” thru “W”, reassemble the
Disc using a new O-Ring, O-Ring Retainer,
and new Lock Screws. Refer to Table 11 for
the proper torque.
i.
Prior to assembly of the Disc into the
Disc Holder, remove the Disc Retainer
from the back of the Disc. Use 1000
grit grinding compound on the bearing
XVI. Reassembly of the 2900 Main Valve (Cont.)
52 |
Baker Hughes
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