Baker Hughes Mooney 20 Series, Instruction Manual

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3. Install the Guide Ring(s) on Disc outside diameter. If
the valve is equipped with two guide rings, position the
space where the guide ring ends meet 180º apart.
D. Guide and Disc Assembly
1. Make sure the chamfer on the Top of the Guide is
smooth. If any sharp edges exist, polish the chamfer,
since the seal could be damaged during assembly.
2. Drop Guide O-Ring into top of Base for outside diameter
of Guide.
3. Insert Guide into top of Base. It will not fit flush. The
Cover Plate will force it down during its installation.
4. Insert Disc Assembly into Guide with the Disc seat
going in first. Continue pushing disc into Guide, being
careful of not pinching the Guide Rings. Push Disc in
until the Disc is in contact with the Nozzle.
5. Install Cover Plate on top of Base such that the pilot will
be aligned for proper tubing connections. Make note of
the length of the studs or Cap screws.
6. Install Spring into dome cavity with smaller coils on
bottom. When installing the Cover Plate, make sure the
spring coils remain in the groove and centered.
7. Install the Cover Plate on top of Base. Torque bolts to
the values found in table 4 using the torque patterns in
Figure 10 and table 5.
Nozzle Torque Values
Valve Inlet Size Nozzle Installation Torque
in. mm ft-lbs ± 5% N-m ± 5%
1.00 25.4 100 136
1.50 38.1 100 136
2.00 50.8 160 217
3.00 76.2 475 644
4.00 101.6 1070 1451
6.00 152.4 1445 1959
8.00 203.2 1865 2529
Bolted Nozzles 60 81
Table 3
Coverplate Cap Screw / Nut Torque
Inlet Size
Orifice
150CL 300CL
in. mm ft-lb N-m ft-lb N-m
1.50 38.1 Full Bore 120 163 120 163
2.00 50.8 Full Bore 210 285 210 285
3.00 76.2 Full Bore 340 461 340 461
4.00 101.6 Full Bore 340 461 340 461
6.00 152.4 Full Bore 510 691 510 691
8.00 203.2 Full Bore 720 976 720 976
10.00 254.0 Full Bore 720 976 720 976
12.00 304.8 Full Bore 720 976 720 976
Table 4
4
Holes
1 3
2 4
6
Holes
1
3
2
5
6
4
12
Holes
1
7 9
3
2
8
12
5
6
10
11
4
20
Holes
1 7
9
3
2
8
12
13
17
15
20
14
5
6
10
18
11
19
16
4
8
Holes
1
7
3
2
8
5
6
4
Figure 10
Bolt Tightening Patterns
Torque Required for Each Round of Pattern
Round Percentage of Required Torque
1 Wrench Tight
2 25
3 60
4 100
5 100
Table 5