Types 1098-EGR and 1098H-EGR
16
SIZE TORQUE
NPS DN Ft-lbs m
1 25 75 to 95 102 to 129
2 50 55 to 70 75 to 95
3 80 100 to 130 136 to 176
4 100 160 to 200 217 to 271
6, 8 x 6, 1
2 x 6
150, 200 x 150,
300 x 150
275 to 300 373 to 407
Table 8. Type EGR Main Valve Cap Screw (key 3) Torque
6. Thoroughly clean and inspect all parts
before reassembling.
7. Apply a minimal amount (2 to 3 drops) of silicon oil
to the port seal (key 12) and install it at side down
in the gland in the seat ring (key 13). Run a nger
around the port seal (key 12) until it is completely
at to remove any trapped air. Lubricate the
seat ring threads and rmly tighten the seat ring
(key 13) into the cage (key 11) using a bar. Use a
back and forth motion during tightening to ensure
the seal doesn’t wrinkle. Back out the seat ring
(key 13) 1 in. / 2.5 cm after tightening.
8. Install the plug O-ring (key 20) and piston ring
(key 14) onto the valve plug (key 16). Insert the
valve plug into the body ange (key 2).
9. Apply a minimal amount (2 to 3 drops) of silicon
oil to the upper seal (key 15) and install it at
side down in the gland in the cage (key 11). Run
a nger around the upper seal (key 15) until
it is completely at to remove any trapped air.
Lubricate the cage threads and using a bar or
strap wrench, rmly tighten the cage (key 11) into
the body ange (key 2). Use a back and forth
motion during tightening to ensure the seal doesn’t
wrinkle. Back out the cage (key 11) 1 in. / 2.5 cm
after tightening.
10. Remove the upside-down body ange (key 2)
if it was anchored on the body. Coat the cage
(key 11) seating surfaces of the valve body
(key 1) web and the body ange (key 2) seating
surfaces of the valve body neck with a good
grade of general- purpose grease. Install the body
ange on the body and secure it evenly with the
cap (key 3) screws or stud bolt nuts (key 29,
not shown). Except on the NPS 1 / DN 25 body,
which does not use it, the pipe plug (key 31) must
be installed in the side tapping of the ange for
proper operation.
11. Make sure that the ange (key 2) and stem
O-rings (key 7) and the bushings are installed
in the indicator tting (key 5). Orient the spring
seat (key 28) as shown in Figure 11 and attach
it with the E-ring (key 23) to the slotted end of
the indicator stem (key 10). Install the travel stop
(key 32) (if used) on the spring seat and then
install the spring (key 9).
12. Being careful not to cut the stem O-ring (key 7)
with the stem threads, install the indicator tting
(key 5) down over the indicator stem (key 10)
until resting on the spring (key 9). Install the hex
nut (key 8) and then the anged indicator nut
(key 22) on the indicator stem, pushing on the
tting if necessary to provide suf cient stem thread
exposure. To maintain clearance for indicator part
installation, draw up the spring seat (key 28) by
turning the hex nut down on the stem until the
threads bottom.
13. Install the indicator tting (key 5) with attached
parts into the body ange (key 2). Back the hex
nut off until the spring completely closes the valve
plug (key 16) against the port (key 12) and upper
seals (key 15), as indicated by stem threads
showing between this nut and the tting. Hold the
indicator scale (key 18) against the tting with
the scale base resting against the shoulder of the
tting and turn the indicator nut (key 22) until its
ange is aligned with the bottom scale marking.
Then lock both nuts against each other and install
the indicator scale and protector (key 19).
Figure 10. Seat Ring / Cage Removal Using
Body as Holding Fixture
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