Baker Hughes Masoneilan 4700P, Инструкция по эксплуатации

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Bypass Valve Option (4700P Only)
See Figure 20 (page 60).
Assembly to Positioner
Figure 20 (page 60).
It may be necessary to remove positioner from valve to assemble bypass.
1. Remove air connections, vent plug, and instrument gauge.
2. Clean surface of body and remove any thread sealant left in threaded ports.
3. Install O-rings (50) in each of the four recesses on the rear surface of the module (45),
making sure they are seated in the bottom of the recess.
4. Assemble to positioner using four 8-32 x 1.25” long screws (21).
5. Reinstall vent plug, instrument gauge, and air connections.
Disassembly
1. To remove from positioner, reverse assembly steps 5 and 4.
Do not use silicone grease on silicone O-rings.
2. To replace valve (48) O-ring seals, remove retaining ring (49) and slide valve out of block.
Remove O-rings (46) and (47), replace with new rings which have a thin coat of Krytox
TM
or other silicone-compatible lubricant. Replace valve in block and secure with retaining ring
(49).
3. Reassemble bypass module to positioner.
Figure 17 - Pilot Assembly
NOTE