8 3 R 74 en
4.2.2 RE / RE1 series
In gland packings, tightness is ensured by the contact
between the gland follower and the packing rings. See Fig.
18.
The gland packing (20) must be replaced if leakage occurs
even after the hexagon nuts (25) have been tightened.
Make sure that the valve is not pressurized.
Detach the actuator and bracket according to the
instructions in Section 4.3.
Remove the key (13).
Remove the hexagon nuts (25), disc spring sets (32),
one stud (24), retaining plates (30) and gland fol-
lower (9).
Remove the packing rings (20) from around the shaft
using a knife or some other pointed instrument
without scratching the surfaces.
Clean the packing ring counterbore.
Place the new packing rings (20) over the shaft (11).
The gland follower may be used for pushing the
rings into the counterbore. Do not damage packing
rings in the shaft keyway. See Fig. 18.
Screw down the removed stud.
Deform the packing rings first by tightening the
gland nuts (25) without disc springs to the torque Tt,
see the value from Table 3.
Remove the gland nuts and one stud. Mount the
retaining plates (30) with the text UPSIDE on top and
the removed stud and place the disc spring sets (32)
on the gland studs. Tighten the nuts (25) so that the
disc springs are compressed to the height Hc, see
Table 3. Lock the nuts with locking compound e.g.
Loctite 221. See Fig. 18.
Check leakage when the valve is pressurized.
4.3 Detaching the actuator
It is generally most convenient to detach the actuator and
its auxiliary devices before removing the valve from the
pipeline. If the valve package is small or if it is difficult to
access, it may be more practical to remove the entire pack-
age at the same time.
See Section 6 for details of detaching actuators.
4.4 Removing the valve from the pipeline
Make sure that the pipeline is not pressurized and
that it is empty. Also make sure that no medium is
led into the pipeline while the valve is being
removed or after it has been removed.
Place the hoisting ropes carefully, unscrew the pipe
flange bolts and lift the valve from the pipeline using
the ropes. Note the correct lifting method. See also
Fig. 13.
Fig. 18 Gland packing, RE/RE1
CAUTION:
For safety reasons the retainer plates MUST always be
installed according to the above instructions.
Fig. 19 Installing the retainer plates
Table 2 Tightening of the gland packing
Valve size A (mm) Hc (mm) Tt (Nm)
DN 25 / 01 20 20.5 5
DN 40 / 1H 20 20.5 5
DN 50 / 02 20 20.5 5
DN 65 / 2H 20 20.5 5
DN 80 / 03 20 20.0 7
DN 100 / 04 20 20.0 7
DN 150 / 06 25 29.0 12
DN 200 / 08 25 29.0 14
DN 250 / 10 25 28.0 16
DN 300 / 12 25 28.0 18
DN 350 / 14 35.5 38.0 38
DN 400 / 16 35.5 37.0 45
DN 500 / 20 40 42.0 70
DN 600 / 24 40 41.5 90
DN 700 / 28 40 41.5 90
CAUTION:
When handling the valve or the valve package, take its
weight into account!
NOTE:
Before dismantling, carefully observe the position of the
valve in relation to the actuator and positioner/limit
switch so as to make sure that the package can be prop-
erly re-assembled.
CAUTION:
Do not dismantle the valve or remove it from the pipe-
line while the valve is pressurized!
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