Emerson 63EG Instruction Manual page 11

12. Being careful not to cut the stem O-ring with the
stem threads, install the indicator fitting (key 5)
down over the indicator stem (key 10) until resting
on the spring. Install the hex nut (key 8) and then
the flanged indicator nut (key 22) on the indicator
stem, pushing on the fitting if necessary to provide
sufficient stem thread exposure. To maintain
clearance for indicator part installation, draw up
the spring seat by turning the hex nut down on the
stem until the threads bottom.
13. Install the indicator fitting (key 5) with attached
parts into the body flange (key 2). Back the hex
nut off (key 8) until the spring completely closes
the valve plug against the port and upper seals,
as indicated by stem threads showing between
this nut and the fitting. Hold the indicator scale
(key 18) against the fitting with the scale base
resting against the shoulder of the fitting and turn
the indicator nut (key 22) until its flange is aligned
with the bottom scale marking. Then lock both nuts
against each other and install the indicator scale
and protector (keys 18 and 19).
Type 1098 Actuator and Pilot Mounting
Perform this procedure if changing the actuator
or inspecting, cleaning or replacing actuator and/
or pilot mounting parts. Actuator part key numbers
are referenced in Figure 13 and mounting part key
numbers in Figure 12 unless otherwise indicated.
1. The actuator and pilot(s) may be removed and
replaced as a unit by disconnecting the pilot
supply tubing (key 28) from the main valve.
2. Access to all internal parts except the stem
O-rings, bearings and wiper ring (keys 6, 56
and 57) may be gained without removing the
bonnet (key 3) or upper diaphragm case (key 2)
from the main valve or the pilot(s) from the bonnet
pipe nipple (key 22). Disconnect the actuator
tubing (key 33) from the connector fitting (key 25).
3. Remove the cap screws (key 10), nuts (key 11),
lower diaphragm case (key 1), diaphragm (key 7)
and diaphragm plate (key 8). To separate the stem
(key 12) from the diaphragm plate (key 8), remove
the stem cap screw (key 9).
4. To remove the case O-ring (key 5), unscrew
the four case cap screws (key 4), remove the
upper diaphragm case (key 2) and remove the
case O-ring.
Types 63EG and 1098-63EGR
5. Lubricate both stem O-rings (key 6) and wiper
ring (key 57). Install them with the stem bearings
(key 56) in the bonnet (key 3). Lubricate the case
O-ring (key 5) and install it in the bonnet (key 3).
Line up the upper diaphragm hole with the holes
in the bonnet; insert and tighten the four case
cap screws. Thread the bonnet into the main
valve body.
6. Secure the diaphragm plate to the stem with
the stem cap screw (key 9). Lay the entire
diaphragm, diaphragm plate and stem assembly
into the lower diaphragm case so the diaphragm
convolution laps up over the diaphragm plate
according to Figure 13. Then install the stem
slowly up into the bonnet to prevent stem or
O-ring damage and secure the lower diaphragm
case to the upper diaphragm case with the cap
screws and nuts. Tighten the cap screws and nuts
evenly in a crisscross pattern to avoid crushing
the diaphragm.
7. Grease the stem O-rings through the grease
fitting (key 28) until excess grease starts coming
out the vent (key 27).
8. Install the pipe nipple(s) and pilot(s) if they
were removed during maintenance. Connect
the actuator and pilot supply tubing if they
were disconnected.
6358 Series Pilots
Key numbers are referenced in Figures 14 and 15. The
pilot may remain on the pipe nipple (key 22, Figure 12)
during maintenance.
Avoid personal injury or damage
to property from sudden release
of pressure or uncontrolled gas or
other process fluid. Before starting
to disassemble, carefully release all
pressures according to the shutdown
procedure. Use gauges to monitor inlet,
loading and outlet pressures while
releasing these pressures.
Disassembly
1. If necessary to check the outlet end of the body
cavity and the seating surfaces for moisture or
debris, remove the body plug (key 3) and body
plug O-ring (key 13) from the body (key 1).
WARNING
!
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