Consolidated 1811 Series Safety Valve Instruction Manual
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© 2020 Baker Hughes Company. All rights reserved.
Adjusting Ring Settings
Note: It is important to note that all adjustments
of adjusting rings are Baker Hughes initial
adjustments only, and are not intended to be
final adjustments. This final adjustment must be
made on the operating system with conditions
approximating those that will be realized under
actual operating conditions.
1.
After final set pressure adjustment, set and pin the upper ring to the above specification.
2. These specifications are approximate starting positions. Adjust ring until “good” pop is achieved. Lock ring and record this
position on test report.
XIV. Setting and Testing (Cont.)
D. Electronic Valve Testing (EVT)
Periodic tests may be required for verification of valve
set pressure. The Consolidated EVT provides for this
capability. However, set pressure is the only factor
which can be verified. Valves should be initially set
using full system pressure (as outlined in Section XVI).
The EVT may be used for subsequent checks of set
pressure.
Accuracy of results obtained by the use of this device
depends on several factors. First, friction must be
reduced as a source of error so that, for a given
pressure, the EVT repeatedly produces exactly the
same lifting force. Second, gauge calibration and
vibration, and the effective seating area between
valves of the same size and type, will also affect
accuracy. With well calibrated gauges and valve
seats in good condition, accuracy on the order of
1% of set pressure may be expected. Upon request,
Baker Hughes will provide pertinent written material
concerning the EVT. This material specifies all required
information necessary to insure proper usage of this
device.
Table 9: Adjusting Ring Settings
Orifice
Upper Ring No. of
Notches
Lower Ring No. of
Notches
Upper Ring Position
from Being Level
with Bottom of the
Disc
1
Lower Ring Position
From Disc Contact
2
F
30
26
Down Two Turns
Down 4 to 6 Notches
G
30
30
Down Two Turns
Down 4 to 6 Notches
H
30
24
Down Two Turns
Down 5 to 8 Notches
J
36
30
Down Two Turns
Down 5 to 8 Notches
K
45
32
Down Two Turns
Down 6 to 10 Notches
L
54
40
Down Two Turns
Down 6 to 15 Notches
M
45
36
Down Two Turns
Down 6 to 15 Notches
N
50
40
Down Two Turns
Down 6 to 15 Notches
P
50
42
Down Two Turns
Down 8 to 15 Notches
Q
60
48
Down Two Turns
Down 8 to 15 Notches
becomes level with the bottom of disk. Then after
choosing the appropriate orifice size, turn the adjusting
ring down the corresponding number of turns (360°)
listed in the “Upper Ring” column. Then replace the
adjusting ring pin. The adjusting ring must be free to
move both directions, but not rotate.
The adjusting rings are now in a starting position for
full lift steam testing. These adjusting ring settings will
generally provide a blowdown greater than required by
Section I of the ASME Code, and should be adjusted
for the particular application.
