Inspection And Part Replacement; Base; Metal Seat Disc; O-Ring Seat Seal Assembly - Baker Hughes Consolidated 19000 Series Instruction Manual

XIV. Inspection and Part Replacement
A. Base (1)
The base should be replaced if:
1. Seat surface
a. Metal seated-seat surface "N" (see Figure 11), is
scratched, nicked, corroded, leaks or is too wide and
cannot be machined (see Table 2 and Section XIII.
A3.2.b).
b. O-ring seat surface "N" (see insert, Figure 11), is
scratched, nicked, corroded or leaks.
2. Threads (all) are torn, stripped or galled.
3. Guide seating surface "U" is scratched, nicked, corroded
or dimension "L" is less than "L" minimum (see Figure 11,
Tables 3 to 5, and Section XIII. A3.2.b).
4. Seat step "F" is at or above minimum listed in Table 5. "F"
can be reestablished by machining as long as "L" stays
within tolerance (see Section XIII. A3.2.b).
B. Metal Seat Disc (2)
The metal seat disc should be replaced if:
1. Seat surface "Y" (see Figure 12), is damaged beyond
lapping or machining limits.
2. Seat relief height "R" is less than "R" minimum and
dimension "S" cannot be maintained (see Table 7).
3. Length "S" is less than "S" minimum (see Table 7).
C. O-Ring Seat Seal Assembly
The O-ring seat seal assembly parts should be replaced as
follows:
1. O-ring seat seal (37) – always replace.
2. O-ring retainer (3)
a. Lapped seat relief height "R" is less than "R"
minimum and dimension "S" cannot be maintained
(see Figure 12 and Table 7).
b. Length "S" is less than "S" minimum
(see Table 7).
c. Retainer lockscrew - always replace.
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D. Bonnet (6)
The bonnet should be replaced if:
1. Threads are stripped, torn or galled.
2. The guide seating surface is scratched, nicked,
corroded or leaks.
3. Condition is porous, corroded or distorted.
E. O-Ring Disc Holder (4)
The O-ring disc holder should be replaced if:
1. The outside surface is worn, egged or galled and/or
cannot meet "H" dimension (see Figure 14 and Table
8).
2. The spindle pocket bearing surface is galled or pitted.
3. The O-ring groove is nicked, scratched or pitted.
4. The O-ring retainer screw threads are torn, stripped or
galled.
Figure 14a: -1 Design
H
X
Z
Y
Figure 14c: Soft Seat-DA/DA-BP
Figure 14: Disc Holder
Consolidated 19000 Series Safety Relief Valve Instruction Manual
Figure 14b: -2 Design
H
Y
H
X
W
Z
Y
V
Z
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