Consolidated 2700 Series Safety Valve Instruction Manual
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© 2022 Baker Hughes Company. All rights reserved.
A. General
Once the valve is disassembled, appropriate parts
can be inspected for damage to determine their
suitability for reuse.
B. Specific Components
1. Lever and Cap Assembly
Visually inspect the lever and cap assembly
for damage from improper handling or severe
corrosion. Components should be replaced if
damage interferes with proper function or manual
lifting of the valve.
2. Compression Screw and Locknut
The compression screw must be replaced if the
threads are damaged to the point that spring
adjustment is affected. The wrench flats should
not be worn, rounded or distorted due to the
improper use of an adjusting wrench on either the
compression screw or locknut. The spring washer
bearing surface or compression screw adapter
surface (5 through Q orifice only), should not be
pitted or torn and should have a 32 RMS finish.
3. Thrust Bearing
The aligning washer must match evenly to the
lower thrust bearing spherical surface, such that
full face contact is achieved between the parts.
Therefore, grind together, or replace the entire
thrust bearing, as necessary.
4. Top and Bottom Spring Washers
The lower spring washer bearing surface must be
ground to the spindle. To grind the lower spring
washer, a 320-grit (Clover 1A) lapping compound
is used for roughing in, and then finish the lap with
1000-grit Kwik-Ak-Shun lapping compound until a
satisfactory bearing band is obtained. The bearing
width should be 1.800” (3.20 mm) minimum to 3.160”
(4.80 mm) maximum. Clean the lower spring washer
and spindle when complete.
5. Spring
Visually inspect for pitting and corrosion of coils
that will reduce the coil diameter. When this
condition is found, replace the spring. Inspect for
end parallelism in the free height and any obvious
unevenness in coils, collapse of coils or general
distortion.
6. Spindle
It is important that the spindle be kept very straight
in order to transmit the spring force to the disc
without lateral binding. Overgagging is one of the
common causes of bent spindles. A method to
check the essential working surfaces of the spindle
is illustrated in Figure 10. This may be performed
either with or without the disc collar and lift stop on
the spindle.
a. Using Figure 10 as a reference, clamp a V
block (A) made of wood, fiber or other suitable
material onto the platform railing. Imbed the
ball end of the spindle in a piece of soft wood
(B) and place the top of the spindle below
the threads, in the V block (A). Clamp a dial
indicator onto the railing and locate at point (C).
The total indicator reading should not exceed
.007” (0.18 mm) when the spindle is rotated. If it
does, the spindle must be straightened prior to
reuse.
XIII. Inspection and Part Replacement
C
B
X
Section X-X
A
X
45
0
A
Figure 10: Spindle
