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Baker Hughes
© 2022 Baker Hughes Company. All rights reserved.
XIV. Re-Assembly Instructions
A. General Information
The Consolidated Series 2700 Safety Valve can
be easily re-assembled after required inspection/
maintenance of internal parts has been performed.
All parts should be clean prior to assembly. See
Section XVI for recommended compounds,
lubricants, and tools.
B. Steps
1.
Prior to reinstalling the lower adjusting ring,
lubricate the threads of the lower adjusting ring pin
and partially insert the pin into the valve body. Now
the pin can again serve as a “pointer,” or reference
point, as previously described in Section XI.B. of
“Disassembly.”
2. Lubricate the threads of the lower adjusting ring,
and install the ring in the valve body. Then, turn the
lower adjusting ring clockwise until the top of the
ring clears the seat.
3. The lower adjusting ring is to be installed in the
position it originally held prior to disassembly. To do
this, place a clean ring lap on the nozzle seat and
turn the lower adjusting ring in a counterclockwise
direction until it makes contact with the ring
lap. If the original location of the adjusting ring
was recorded, simply lower the ring, by turning
it clockwise, the same number of notches as
was recorded in Step XI.B. of “Disassembly.” If
information on the original lower ring position is not
available, the ring should be lowered, by turning it
clockwise one notch for every 600 psig (20.7 barg)
of set pressure. This position represents a staring
position. See the following note.
Note:
For a valve set pressure of 1200 psig (81.6
barg), the ring will have to be lowered two (2)
notches below the bushing seat. This will be
the starting position, with the final position
determined during field testing.
4. Once the lower adjusting ring is in its correct
location, lock it in place by installing in the lower
adjusting ring pin. Verify that the lower ring is
capable of a slight movement. If the lower ring does
not move, the pin is too long. Should this be the
case, grind the end of the pin slightly to shorten it,
while retaining the original tip contour, then reinstall
the pin.
5. If the upper adjusting ring has been removed from
the guide, lubricate the ring threads and re-install
the ring on the guide.
6. Install the adjusting ring and guide assembly into
the valve base such that the scribe marks will be
visible from the valve outlet or the inspection port.
7. Measure the overall length of the upper ring and
guide assembly. Adjust the upper ring to the
Dimension C recorded in Step 12 of Section XI.B.,
“Disassembly.” Observe the marks made on the ring
and guide and adjust the ring to align the marks.
Recheck the overall length of the adjusting ring and
guide assembly to assure that the upper ring is in its
original position.
8. Measure from the top of the guide to the bushing
seat with a depth micrometer. Subtract Dimension
B as measured in Step 11, Section XI.B. of
“Disassembly,” from the dimension previously
measured. The difference is the distance the upper
adjusting ring must be lowered. Refer to Table 7 to
Table 7: General Adjusting Ring Information
Orifice
Pressure
Class
Total Number of
Notches
Number of Notches Disc
Holder to Seat
Vertical Ring Travel for each
Notch of Adjustment
Lower
Ring
Upper
Ring
Lower Ring Upper Ring
Lower Ring
Upper Ring
in.
mm
in.
mm
#1
All
18
22
7
10
.0035
0.089
.0025
0.064
#2
All
21
31
8
12
.0030
0.076
.0020
0.051
#3
All
31
41
12
16
.0020
0.051
.0015
0.038
#5
All
31
37
12
17
.0020
0.051
.0015
0.038
#4
All
31
47
12
16
.0020
0.051
.0015
0.038
#6
All
41
56
30
45
.0015
0.038
.0010
0.025
Q
All
48
62
30
45
.0015
0.038
.0010
0.025
