Types 1098-EGR and 1098H-EGR
15
!
wARNINg
To avoid personal injury resulting
from sudden release of pressure,
isolate the regulator from all pressure
and cautiously release trapped
pressure from the regulator before
attempting disassembly.
Type EgR Main Valve
Replacing Quick-Change Trim Package
Perform this procedure if the entire trim package
is replaced. Key numbers for both the complete
main valve and its trim package are referenced in
Figures 12 and 13. Some replacement trim package
assembly numbers are listed in a table in the parts list.
Note
All disassembly, trim change, and
reassembly steps in this section may be
performed with the regulator in the main
line and without disconnecting the pilot
supply or control lines.
1. Remove the cap screws (key 3) with a cast iron
body or remove the hex nuts (key 29, not
shown) with a steel body. Pry the body flange
(key 2) from the valve body (key 1) and lift out the
trim package.
2. Perform any required inspection, cleaning, or
maintenance on the exposed surfaces of the valve
body (key 1) or trim package. Replace the gasket
(key 4) or cage O-ring (key 17) as necessary.
3. On a pre-built replacement trim package, check
indicator zeroing by unscrewing the indicator
protector (key 19) and seeing if the flange of
the indicator nut (key 22) lines up evenly with
the bottom marking on the indicator scale
(key 18). If not, remove the indicator scale
and separate the indicator nut and hex nut
(key 8). Hold the indicator scale against
the indicator fitting (key 5) with the scale base
resting against the shoulder of the fitting, and
turn the indicator nut until its flange is aligned
with the bottom scale marking. Then lock both
nuts against each other, and install the indicator
scale and protector.
10C1212
Figure 11.
Types 1098-EGR and 1098H-EGR Travel
Indicator Assembly
19
10
37
35
7
21
6
9
28
23
36
5
8
22
18
4. Coat the cage seating surface of the valve body
(key 1) web and the body flange (key 2) seating
surfaces of the valve body neck with a good grade
of general-purpose grease. Install the trim
package, and secure it evenly with the cap screws
(key 3) or stud bolt nuts (key 29, not shown).
No particular trim package orientation in the body
is required.
Replacing Travel Indicator Assembly
The Types 1098-EGR and Type 1098H-EGR travel
indicator assemblies now incorporate a redesigned
O-ring retainer (key 6), Polytetrafluoroethylene
(PTFE)
backup rings (key 36), and an additional indicator
fitting (key 35).
When performing maintenance on the original
Type 1098-EGR or 1098H-EGR body flange,
travel indicator replacement is recommended. The
redesigned travel indicator assembly is incorporated
into all Quick-Change Trim Kits (e.g. 25A3170X012)
and on the Travel Indicator Kits (see table by size).
The elastomer repair kits contain the components for
the redesigned travel indicator assembly.
