Consolidated 1511 Series Safety Valve Instruction Manual
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© 2020 Baker Hughes Company. All rights reserved.
XII. Inspection and Part Replacement (Cont’d)
4. Adjusting rings:
If damage is present on the lower surface of the upper
adjusting ring, or on the upper surfaces of the lower
adjusting ring, the damaged part must be replaced.
Thread damage may also be a cause for replacement,
if it prevents adjustments when the valve is heated.
5. Bushing Seat:
Seat bushings are normally treated as part of the
valve body and should be machined when necessary,
inside the valve body. (See Seat Bushing Machining
3. Clearance between the disc and upper ring/guide:
Measure the I.D. of the guide and the O.D. of the disc;
subtract to find the cold clearance.
The maximum clearance should not be greater than
the value indicated in Table 7. Greater clearances can
indicate wear and can generate alignment problems
and cause the valve not to reseat properly.
F
E
G
B
C
Figure 9: Bushing Seat
1. Once clearance exceeds table values, further inspection is required for the disc and
upper adjusting ring.
Instructions, Section XI.B) When the “E” dimension
is reduced by machining or lapping to the minimum
given in Table 8b, the valve seat bushing should be
remachined to the given dimension. The bushing seat
can be remachined until the limiting Dimension “G” is
reached as per Table 8a. See instructions concerning
the “G” dimension in Table 8b. The bushing seat
must be lapped to a mirror finish to determine if they
are flat and free of nicks, cuts and scratches. (See
Section XI.C for Lapping Instructions.)
Table 7: Allowable Clearance Between
Upper Adjusting Ring and Disc
(1)
Orifice
Clearance
Disc Outside
Diameter
Upper Adjusting
Ring (Inside
Diameter)
min
max
in.
mm
in.
mm
in.
mm
in.
mm
H
.007
0.18
.014
0.36
1.905
48.39
1.919
48.74
J
.007
0.18
.014
0.36
2.445
62.10
2.459
62.46
K
.006
0.15
.013
0.33
2.930
74.42
2.939
74.65
L
.007
0.18
.014
0.36
3.638
92.41
3.652
92.76
M
.007
0.18
.014
0.36
4.079
103.61
4.093
103.96
N
.012
0.30
.019
0.48
4.483
113.87
4.502
114.35
P
.008
0.20
.017
0.43
5.448
138.38
5.465
138.81
Q
.010
0.25
.019
0.48
7.137
181.28
7.156
181.76
Table 8a: Seat Bushing
Replacement Criteria
Orifice
G min
in.
mm
H
.937
23.80
J
.937
23.80
K
1.187
30.15
L
1.375
34.93
M
1.375
34.93
N
1.500
38.10
P
1.750
44.45
Q
2.187
55.55
