IM-S24-42
CTLS Issue 10
46
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TRANSLATION RUN OVER
5
6
7
-
Repeat Steps 5, 6 and 7 until the bonnet nuts or bolts have an even tension.
-
Continue Steps 5, 6 and 7 but use a torque wrench set at 10% of maximum required torque setting.
-
Again, repeat Steps 5, 6 and 7, incrementally increasing the torque value to 20%, 40%, 60%,
80% and finally 100% of the required torque value (as specified in Table 1).
-
Pull the plug off its seat, rotate by 120
°
and slowly push it back down into the seat checking for any signs
of resistance as the plug comes into contact with the seat.
-
Repeat the above Step, three more times.
-
If any resistance is felt, this can indicate the plug and seat is
misaligned and the process will need repeating.
-
Tighten the gland nut (
18
) until:
i) PTFE gland assembly: Metal-to-metal contact with the bonnet
is achieved.
ii) Graphite gland assembly: A gap of 3 mm between the underside
of the gland nut and the bonnet is achieved. See Figure 12.
-
Refit the lock-nut (
3
).
-
Reinstall the actuator.
-
Bring the valve back into service.
-
Check for leakage at the gland.
Note:
Recheck the graphite seals and retighten the gland if necessary
after a few hundred cycles as the seals fully bed in.
3 mm
Fig. 12
Using a spanner lightly and
evenly tighten each bolt or nut
by 45
°
, following the sequence
illustrated in Figure 5, page 37.
After each tightening
sequence lift the stem fully.
Firmly and briskly push the
stem fully down.
18
Summary of Contents for Spira-trol K Series
Page 2: ...IM S24 42 CTLS Issue 10 2...
Page 53: ...IM S24 42 CTLS Issue 10 53 Fig 22 Balanced 3 19 4 6 16 31 Fig 21 15...
Page 57: ...IM S24 42 CTLS Issue 10 57 C1 C D1 D2 D B E G A H Soft seat arrangement C2 Fig 26 H1...
Page 61: ...IM S24 42 CTLS Issue 10 61 C2 B D4 D5 E G D F A H Soft seat arrangement Fig 28 H1...
Page 66: ...IM S24 42 CTLS Issue 10 66...
Page 67: ...IM S24 42 CTLS Issue 10 67...
Page 68: ...IM S24 42 CTLS Issue 10 68...
