Baker Hughes Masoneilan 4700P, Инструкция по эксплуатации

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Masoneilan 4700P/E & 4800P/E Positioners Manual | 49 © 2021 Baker Hughes Company. All rights reserved.
Reassembly
See Figure 18 (page 56) and Figure 19 (page 58).
1. Position the diaphragm assembly (9) on the case sub-assembly. If positioner is 6-30 psi
range, install reducer plate per Figure 19. Secure the body subassembly to the case
subassembly with cap screws (10). Tighten evenly to 60 inch-lbs of torque.
2. Replace spring (5), lever S/A (3), washer (16), and retaining ring (17).
3. On 4700E/4800E, carefully place module in position against body making sure that O-rings
do not come out of grooves. Secure to body using screws (21).
4. Install the pilot assembly (11) and pressure gauges.
5. Install the positioner on the actuator. Reconnect air lines, electrical leads if 4700E/4800E,
and coupling linkage if mounted on reciprocating valve.
6. Assemble cam to shaft per procedure under “Cam Lobe Change” on page 38. Recalibrate
per appropriate Valve Action/Positioner Action calibration section.
Diaphragm
If the diaphragm has deteriorated, replace the diaphragm assembly. This requires separation of
the body and case subassemblies as outlined under Disassembly48.
I/P Module
Replacement of the I/P module requires removal of electrical connections, including conduit if
used. Remove positioner from valve if module mounting screws are not accessible. Remove
and replace module as outlined under “Disassembly” on page 48.
NOTE
There are no adjustments in the I/P module.