10
IMO-227 EN
IMO 8/17
13. Install the top set of stem seals (104) over the stem as
shown in (Figure 9).
14. Hold the stem in place and slide the compression ring
(111) and compression plate (20) over the stem (4) and
studs (29).
15. Place the disc springs (31) over each stud (29) (see
Figure 20 for proper orientation). A lubricant, compat-
ible with the flow media, MUST be applied to the stud
(29) threads and the face of the stud nut (30).
16. Place the stud nut (30) on each stud (29) and tighten
nuts a few turns alternately so that the compression
plate (20) remains parallel with the body bonnet. Do
not fully torque down stud nuts (30) at this time.
17. Insert the
Emission-Pak
subassembly into the body,
being careful not to damage the
Emission-Pak
housing
seals. A lubricant, compatible with the flow media,
MUST be applied to the stud (102) threads and the face
of the nut (111).
18. It is recommended for optimal performance to press
the
Emission-Pak
subassembly fully into the body so
the body bonnet and the bottom flange surface of the
Emission-Pak
subassembly are metal to metal contact.
Recommended press loads can be found in (Table 3).
19. Once metal to metal contact has been achieved, tighten
the nuts (111) to the torque values in (Table 4). Apply
the torque evenly in a crisscross pattern.
20.
Screw the insert (2) into the body until it is fully down,
and then mark its position as shown in the left view
of (Figure 11). Counting the number of turns, remove
the insert.
TABLE 2
Bonnet Stud Nut Torque (Emission-Pak Valve)
Size
Series
V-RING STEM SEALS
GRAPHITE STEM SEALS
ft-lbs
In-lbs
N-m
ft-lbs
In-lbs
N-m
3
7150/7180
8
96
11
16
192
22
3
7300/7380
8
96
11
16
192
22
3
730S/738S
8
96
11
16
192
22
4
7150/7180
8
96
11
16
192
22
4
7300/7380
15
180
20
36
432
49
4
730S/738S
15
180
20
36
432
49
6
7150/7180
15
180
20
36
432
49
6
7300/7380
22
264
30
48
576
65
6
730S/738S
22
264
30
48
576
65
TABLE 3
Emission-Pak Housing Press Load
Size
Series
Minimum Load
Maximum Load
tons
tons
3
7150/7180
8
10
3
7300/7380
8
10
3
730S/738S
8
10
4
7150/7180
8
10
4
7300/7380
10
12
4
730S/738S
10
12
6
7150/7180
10
12
6
7300/7380
10
12
6
730S/738S
10
12
TABLE 4
Emission-Pak Housing Nut Torques
Lubricated Torques ft-lbs (N-m)
Fastener
Size
A193 GR.
B7
A193 GR.
B8
A193 GR.
B7M
B473 UNS
N08020
QQ-N-286
Fastener Identification Mark
B7
B8
B7M
35
K or 71
M8
21 – 26
(29 – 35)
20 – 25
(27 – 34)
16 – 20
(22 – 27)
12 – 15
(16 – 20)
17 – 21
(23 – 28)
M10
42 – 51
(57 – 69)
40 – 49
(54 – 67)
32 – 39
(43 – 53)
24 – 29
(32 – 39)
34 – 41
(46 – 56)
M12
73 – 89
(99 – 121)
69 – 85
(93 – 115)
56 – 68
(76 – 92)
42 – 51
(57 – 70)
59 – 72
(80 – 98)
21. 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 the
bottom grounding spring (71) into the hole at the bot-
tom 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 nec-
essary (see Figure 7).
22. Place the second seat (5) into the insert (2) with the
proper surface (see Figure 7) adjacent to the ball.
23. Insert the body seal (6) into the body, and gently press
into the groove.
24. Apply a lubricant compatible with the flow 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 field wrench. The insert must be tight-
ened the same number of turns as in Step 20, insuring
that the marks are no more than 1/8” (3.18 mm) apart,
as shown in right view of (Figure 11).
25. While pulling the stem (4) outward, tighten the hex
nuts (30) to the torque values in (Table 2). Apply the
torque evenly, alternating between the two nuts so
that the compression plate (20) remain parallel with
the
Emission-Pak
housing bonnet.
26. 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.
27. Replace top grounding spring (70) and retaining ring
(72) to stem (4).
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