Baker Hughes Masoneilan 41005 Series, Instruction Manual

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Baker Hughes
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5.3 Assembly of the Parts Inside the
Valve Body
Proceed as follow:
1. Preliminary Controls : refer back to section 5.1
2. Mount the cage (B107)
3. In case of double cage TRIM 41355 API 6A see Table 4,
assembly as Figure 11
a. Put the inner cage (13) upside down
b. Screw the outer cage (B110) and the inner cage
(B107) at the torque value as per Table 4.
c. Screw Sets screws (B914) to the outer cage (B110)
Figure 11 - Exploded View of 41355 API 6A Trim
5.4 Assembly of the Bonnet
1. Check that the packing ring (B207), anti-extrusion rings
(B208) and the guide bushing (B203) have been removed
from the bonnet (B003).
2. Make sure that the body gasket (B015) is fitted in the
Body (B001) and the Bonnet (B003) groove.
3. Position the bonnet (B003) above the valve, so that the
packing flange studs (B220) are perpendicular to the flow
direction of the valve.
4. Lower the bonnet (B003) onto the valve stem (B150) and
push it down carefully until it goes into the valve body
studs (B002) and takes up its correct position.
5. Make sure that the valve plug (B112) operates freely, for
the 41305 valves take in account the friction force of the
plug seal ring (B118).
6. No need to lubricate the stud thread as it is coated with
PTFE. During the body nut tightening, take care that the
plug stays in contact with the seat ring. For 41300 Series,
it can be necessary to apply a constant force on the plug
stem (B150) to achieve and maintain this contact.
7. Screw on the body stud nuts (B014) by hand. Tighten the
nuts lightly and evenly so that the internal parts are held
in place. The face of the bonnet (B003) should be parallel
to the upper face of the body (B001).
8. Slide the guide bushing (B203) onto the valve plug stem
(B150) and let it drop to the bottom of the packing box
housing.
5.5 Tightening of Body Studs
Alignment of internal parts:
In order to achieve perfect alignment of the cage (B118) and
the valve plug (B112), a force must be applied to the plug
stem (B150) during tightening of the bonnet (B003) which
results in correct relative positioning of the two parts.
The force can be applied with the pneumatic actuator as
follows:
Place the actuator on the valve bonnet (B003) by means
of the yoke nut (B017) or attachment screws (B915) and
connect the valve plug stem (B150) to the actuator stem.
1. 41355 option is not available for 10” API 6A 41005 valves
Table 4 - Torque Value for 41355 API 6A Trim
D
es
cri
pt
io
n
Valve
Size
(inch)
3 4 6 8 10
(1)
Valve
Class
10K/
15K
10K/
15K
10K/
15K
10K/
15K
10K/
15K
Outer/
Inner
Thread
size
4’’1/2-
16UN-
2B
5’’5/8-
16UN-
2B
6’’3/8-
16UN-2B
8’’1/2-
16UN-2B
N/A
Torque
[daN.m]
276 396 414 750 N/A
Torque
[ft-lb]
2036 2921 3053 5532 N/A