Consolidated 13900 Series POSRV Maintenance Manual
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© 2018 Baker Hughes, a GE company. All rights reserved.
XVIII. Assembly of Pilot and Main Valve
1. Before reassembly, all surfaces should be thoroughly cleaned and free from burns.
2. Refer to Figure 1 for proper nomenclature.
3. Install the lower Gasket (52) for sensing tube in the main valve bonnet.
Note: There are two gaskets used to seal this joint. One above and one below the
sensing tube flange.
4. Install the Sensing Tube (17) in the main bonnet.
5. Install second Gasket (52) in the groove in the sensing tube flange.
6. Install the pilot Base (20) into the main valve bonnet. The outlet of the pilot should
face the outlet of the main valve.
7. Install the pilot flange Stud Nuts (45) and torque down evenly. See Figure 19 and
Table 7 for torquing values.
8. Install the fittings on the discharge tube. Also install O-Rings (12) onto the discharge
tube.
9. Insert the Discharge Tube (43b) into pilot valve outlet. Loosely tighten the Pilot
Valve Tube Fitting (43a).
10. Loosely tighten the main valve boss Tube Fitting (43a).
11. Once alignment of tube is properly adjusted, Tube Fittings (43a) should be securely
tightened.
Decontaminate or clean
if necessary before
pretesting or disassembly.
Safety and environmental
precautions must be taken
for the decontamination or
cleaning method used.
Table 7: Pilot Flange Nut Torque
Round
10% / -0%
ft-lb
N-m
1
20
27.1
2
40
54.2
3
60
81.3
4
80
108.5
5
110
149.1
11
3
5
2
4
6
Figure 19: Pilot Flange Nuts Tightening Sequence
XVII. Assembly of Main Valve (Contd.)
