Disc To Guide Seal; Guide And Disc Assembly (D, E, F, G, H, J, K, & 3"L) - Baker Hughes Consolidated 4900 Series Instruction Manual

XV. Reassembly of 4900 Series Main Valve (Cont.)
B.2 Disc to Guide seal
1. For Teflon seals make sure of the integrity of
the Teflon seal and seal spring. Install Disc Seal
on Disc outside diameter on the opposite end of
the disc seat as shown in Figure 12.
2. If an O-Ring seal is used, it is installed in the
groove between where the Guide Ring is
installed and where a Spring Energized Seal
would be installed (Figure 12).
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 180° apart.
Figure 15: Disc Seal Installation
Valve Size
Bore
Type
in. mm
1.00 25.40
1.50 38.10
1.50 38.10
2.00 50.80
Standard
Bore
3.00 76.20
4.00 101.60 L, M, N, P 340 460.98 340 460.98 340 460.98 340 460.98 340 460.98 N/A
6.00 152.40
8.00 203.20
1.50 38.10
2.00 50.80 Full Bore
3.00 76.20
Full Bore 4.00 101.60 Full Bore
6.00 152.40 Full Bore
8.00 203.20 Full Bore
10.00 254.00 Full Bore
1. Contact factory.
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Disc Seal
Disc
Disc O-Ring
Table 4: Coverplate Cap Screw/Nut Torque
4905
Orifice
ft-lb. Nm ft-lb.
D, E, F 40 54.23 40
D, E, F 40 54.23 40
G, H 120 162.70 120 162.70 120 162.70 120 162.70 120 162.70
G, H, J 120 162.70 120 162.70 120 162.70 120 162.70 120 162.70
J, K, L 210 284.72 210 284.72 210 284.72 210 284.72 210 284.72 1015 1376.16
Q, R 340 460.98 340 460.98 340 460.98 N/A
T 510 691.47 510 691.47 510 691.47 N/A
Full Bore 120 162.70 120 162.70 120 162.70 120 162.70 120 162.70 Note 1
210 284.72 210 284.72 210 284.72 210 284.72 210 284.72 Note 1 Note 1
Full Bore 340 460.98 340 460.98 340 460.98 340 460.98 340 460.98 Note 1 Note 1
340 460.98 340 460.98 340 460.98 340 460.98 N/A
510 691.47 510 691.47 510 691.47 N/A
720 976.19 720 976.19 720 976.19 N/A
720 976.19 720 976.19 N/A
B.3 Guide and Disc Assembly
(D, E, F, G, H, J, K, & 3"L)
1. Make sure the chamfer on the BOTTOM of
the Guide is smooth. If any sharp edges exist,
polish the chamfer, since the seal could be
damaged during assembly.
2. Insert Disc Seal (Disc O-Ring) into bottom of
Guide first. Continue pushing Disc into Guide,
being careful of not pinching the Guide Rings.
Push Disc in until shoulder of Disc hits bottom
of Guide.
3. Drop Guide O-Ring into top of Base for outside
diameter of Guide.
4. Insert Guide/Disc assembly into top of Base.
It will not fit flush. The Coverplate will force it
down during its installation. Push Disc in until the
Disc is in contact with the Nozzle. Use threaded
hole on top of disc if necessary to lift assembly.
5. Install Coverplate O-Ring into top groove
on Guide.
6. Thread the Sensing Element into the bottom
of the Coverplate. Torque to 50±5 ft-lbs
(67.8±6.8N-m).
4910 4912
Nm ft-lb. Nm ft-lb.
54.23 40 54.23 40
54.23 40 54.23 40
N/A N/A
Consolidated 4900 MPV Series POSRV Manual
4914 4916
Nm ft-lb. Nm ft-lb.
54.23 40 54.23 90
54.23 40 54.23 340
510
720
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
4918
Nm
122.02
460.98
691.47
976.19
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
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