IMO-227 EN
9
IMO 8/17
12. Place the valve in a vertical position, insert end up, on
a clean soft surface such as a folded rag or a piece of
cardboard. If the valve has grounded option, insert
bottom grounding spring (71) into hole at the bottom
of the stem (4). Insert the ball (3) rotating it onto the
stem (4) in the closed position. If necessary, turn the
stem blade to align with the ball slot. Make certain
that the stem blade is in the middle of the ball slot; i.e.
equal distance from the ends of the slot. Rotate the ball
if necessary (see Figure 7).
Figure 10 Disc Springs Orientation
13. Place the second seat (5) into the insert (2) with the
proper surface (see Figure 7) adjacent to the ball.
14. Insert the body seal (6) into the body, and gently press
it into the groove.
15. Apply a lubricant compatible with the fl ow media to
the threads of insert (2) and screw the insert into the
body. The tightening of the insert should be done
using the insert fi eld wrench. The insert must be tight-
ened the same number of turns as in Step 12, insuring
that the marks are no more than 1/8” (3.18 mm) apart,
as shown in right view of (Figure 11).
Figure 11 Insert Installation
16. Cycle the valve slowly with a gentle back and forth
motion building gradually to the full quarter turn. By
cycling slowly, the seat lips will seat against the ball.
Take care to avoid scratching the ball O.D.
17. Replace top grounding spring (70) and retaining ring
(72) to stem (4).
4 .8
Assembly - Emission-Pak Valve
It is advisable to replace seats and all seals if complete
disassembly becomes necessary. Refer to Repair Kit chart
(see Table 9B). A lubricant, compatible with the fl ow media
MUST be applied to the threads on insert (2) to prevent
during assembly.
1. Clean all valve components if not done previously.
2. With a wire brush, clean studs (29) and stud nuts (30)
of foreign material, such as paint, thread locker, grime
and commodity. Inspect the threads for damage or
defects with appropriate ring or plug gauge. Repair
any out-of-tolerance threads, or replace in-kind. Check
that nut can be run up and down entire usable portion
of the threads. See (Figure 19).
3. Re-inspect all components for damage before reas-
sembling the valve. Look for damage to the seating
areas, stem, body and insert; and look for wear in the
bearing areas. Replace any damaged parts.
4. Carefully clean and polish the ball (3) sealing surface: It
should be free of all scratches and grooves.
5. If the ball is slightly damaged, it may be possible to
smooth the sealing surface with crocus cloth or equiv-
alent. If deep scratches are present, replace the ball.
6. With the body insert side facing up, slide one valve seat
(5) sideways into the body (1) to below the stem bore,
and tilt it into place so that the proper surface (see
Figure 7) will be adjacent to the ball (3), being careful
not to cut or scratch the seat.
7. Insert new bearing strip (109) into recess inside lower
stem bore of
Emission-Pak
housing (101) (see Figure
20).
8. Place inner and outer stem retainer seals (105) and (106)
on the
Emission-Pak
housing (111) shown in (Figure 20).
9. Slide one thrust bearing (13), the secondary stem seal (7)
and the second thrust bearing (13) over the stem (4) (see
Figure 8 for proper orientation).
10. Insert the stem subassembly into the
Emission-Pak
housing (101). Pull the stem outward to seat the thrust
bearings. Install one set of stem seals (104) and lantern
ring/spacer (103) over the stem as shown in (Figure 9).
For optimal performance, pre-compress the fi rst set of
stem seals.
11. Install the compression ring (111) and compression
plate (20) over the stem. Using stud nut (30), apply the
torque value listed in (Table 2).
12. Remove the stud nuts, compression plate, and compres-
sion ring from
Emission-Pak
housing.
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