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Plug Guide
Plug Stem
Pin Hol e
Dia. "E"
Dia. "F"
Dia. "C"
in.
mm
in.
mm
in.
7/8
22.22
1/2
12.70
.138
1 1/2
38.10
1/2
12.70
.138
2 3/8
60.32
3/4
19.05
.197
2 3/4
69.85
3/4
19.05
.197
Cylindrical machining
diameter of the jaw =
plug guide diameter "E"
Soft metal
or plastic
vise jaws
10.3 Plug and Seat Ring Seating
Surfaces
It is not possible to lap the plug and seat ring seating
surfaces after the bellows has been assembled to the
stem.
If the seat ring shows signs of minor wear, it should be turned on
a lathe to clean up the worn area. The seating surface of the seat
ring is 30 degrees from centerline axis. However, no more than
0.010 in. (0.25 mm) of material should be removed.
In cases where the seat ring cannot be repaired, or if the plug is
also damaged the only alternative is to replace both parts.
10.4 Bonnet Reassembly
Place new gasket (28) into the groove of the bonnet spacer. Install
the bonnet (25) and assemble nuts (27) and studs (26). Bonnet
must be positioned so the packing flange studs are at a 90° angle
to the flow centerline.
Refer to table in Figure 11 for proper bolt torque and tightening
sequence.
10.5 Valve Body Reassembly
Refer to instructions stated in Section 8 for the specific trim type
involved.
Copyright 2023 Baker Hughes Company. All rights reserved.
"D"
"L"
mm
in.
mm
in.
mm
29
3.50
42
1.65
.70
18
3.50
2.17
55
1.25
32
5.00
2.75
70
2.00
50
5.00
2.75
70
2.00
50
30
28
Figure 18 - Unpinning and Pinning of the Plug to Stem
Pull plug out of the Bonnet
Extension (29) for access to
the plug pin
Lower Mechanical Stop
to Protect the Bellows
=
L
=
Plug and Plug Stem-Bellows S/A Stem
10.6 Actuator to Body S/A and Plug
Stem Adjustment
Refer to instruction Ref. 19530.
WARNING
Assembly of the No. 6 actuator on a bellows seal
valve requires a three-sectioned coupling. Follow
coupling instructions as described for the No. 10, 16
and 23 actuators.
CAUTION
The bellows assembly causes a "spring back" effect.
Measure this plug spring back before referring to
Instruction Ref. 19530. Be sure to add this spring
back length to the over seat adjustment.
CAUTION
Masoneilan 21000 Series Top Guided Globe Valve Instruction Manual | 17
16
17
C Dia.
D
E Dia.
F Dia.
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