E. Press the seals (7) and (24), or (8), up into the lower
stem bore.
F. From the outside, insert the upper stem seal (8).
G. Press the stem (4) up into the stem bore until
resistance is felt from the lower stem seal. Go on to
Step 2.
1. ½” – 2” (DN15-50) Series 5000 or 6000 Valves
A.
From inside the body cavity, first insert the
secondary stem seal (7) and then the lower stem
seal (24) (for fire-tested valves), or insert only the
lower stem seal (8) (for non-fire-tested valves), up
into the lower stem bore.
B. From the outside insert the upper stem seal (8)
into the upper stem bore.
C. Insert the stem (4) into the body cavity and press it
gently up into the stem bore until resistance is felt
from the lower stem seal. Be careful not to scratch
the seals. Go to Step 2.
2. Holding the stem in place from inside the body, drop
the compression ring (21) and the stem nut lock (15)
into place. Screw on the stem nut (16) and torque to the
value shown in (Table 1).
3. Select the tab of the stem nut lock that aligns with a flat on
the stem nut and bend the tab up until it contacts the flat.
4. If you have a torque wrench, skip this step and proceed
to Step 5. Screw the insert (2) into the body until it is
fully seated. Use a pencil or felt tip marker to mark the
position as shown in (Figure 8). Counting the number
of turns, remove the insert.
5. Insert the body seat (5) into the body at an angle to
slide it past the ball end of the stem, then rotating it so
it sits flat on the seat face in the body.
6. Insert the ball (3), rotating it on the stem (4) in the
closed position. If necessary, turn the stem blade to
align with the ball slot.
7. Insert the second seat (5) so that the sealing surface of
the seat is towards the ball (see Figure 10).
8. Insert the body seal (6) and gently press it into the
groove in the body.
9. After applying a lubricant compatible with the media
to the insert threads, screw the insert (2) into the body
and tighten to the required torque shown in (Table
2). If a torque-wrench is not available, tighten the
insert the same number of turns as in Step 4 until the
marks match the “A” dimension shown in (Table 2) and
illustrated in (Figure 9).
TABLE 1
Stem Nut Assembly Torque
Valve Size
Item #16
Inches
DN
IN•LBS
N•m
1/2 – 3/4
15 – 20
30 – 40
4 – 5
1 & 1-1/4
25 & 30
70 – 80
8 – 9
1-1/2 & 2
40 & 50
160 – 170
18 – 19
TABLE 2
Series 5000 Valves
Valve Size
Torque
A
Alum.& Bronze
Other Material
inches DN
FT•LBS
N•m
FT•LBS
N•m
inches
mm
1/2
15
90 – 100 122 – 136 125 – 150 170 – 203 7/32
5.56
3/4
20
90 – 100 122 – 136 125 – 150 170 – 203
1/4
6.35
1
25
90 – 100 122 – 136 125 – 150 170 – 203 5/16
7.94
1-1/2
40
125 – 150 170 – 203 170 – 200 231 – 271
3/8
9.53
2
50 125 – 150 170 – 203 170 – 200 231 – 271
7/16 11.11
Series 6000 Valves
Valve Size
Torque
A
inches DN
FT•LBS
N•m
inches mm
1/2
15
125-150
170-203
7/32
5.56
3/4
20
125 – 150
170 – 203
5/16
7.94
1
25
125 – 150
170 – 203
11/32
8.73
1-1/2
40
170 – 200
231 – 271
7/16 11.11
Bonnet of Valve
Figure 7 Stem Orientation
Mark
Insert
Body
Figure 8 Marking the Insert Position
A
Figure 9 Insert Orientation
IMO 4/18
IMO-50 EN
7
