3 R 74 en
13
with the drive shaft in lower position (before the
valve is installed). Tighten the nut of the tool in
such a way that the tool pulls the drive shaft to
the uppermost position. The position may be
checked from the side of the tool.
❑
Install the actuator on the valve and attach the
valve mounting screws loosely by hand. Then
tighten the tightening screw (I) according to
Table 5. The required torque is also marked on a
plate close to the drive shaft on the actuator
housing. The installation tool is removed, and the
coupling plate is reattached. Finally, tighten the
valve mounting screws.
❑
Check the axial position of the drive shaft. The
shaft position may not be at the upper or lower
position X given in Table 5, or close to those val-
ues. Remount the actuator if the position is not
correct.
The valve may malfunction if the tightening of
the connection has been carried out improperly.
❑
Finally, the extreme positions of the valve are
adjusted with the stop screws at the ends of the
actuator. The location of the screws for adjusting
the Close and Open positions of the valve are
marked with letters on the ends of the actuator
housing, see Fig. 34.
6.3
Detaching EC and EJ actuators
The actuator is detached in the same way that it is
attached, but the order is reversed.
The actuator must always be depressurized and the air
supply pipes removed before detaching the actuator.
❑
First detach the positioner, or any other accessory,
from the actuator, and detach the coupling plate from
the drive shaft. Next, the bushing is loosened by turn-
ing the tightening screw counter-clockwise. The tight-
ening screw also acts as an extractor. It is highly
recommended to use a suitable bushing from the
tool set H061544 between the tightening screw
(I) and drive shaft. The bushing dimensions are
given in Table 6.
❑
Detach the actuator finally from the valve after
the screws that attach the actuator to the valve
have been removed.
❑
Observe the respective positions between the
actuator and valve and also between the key and
keyway before removal. Attaching the actuator
back is then easier.
6.4
Installing B1C actuators
❑
Drive the actuator piston to the extreme outward
position and turn the valve into the closed posi-
tion, see Fig. 36.
❑
Clean the shaft bore and file off any burrs. Lubri-
cate the shaft bore.
❑
If a coupling is needed between the actuator
shaft bore and the valve shaft, lubricate the cou-
pling and install it in the actuator.
❑
Fasten the bracket loosely to the valve using
lubricated screws.
❑
Push the actuator carefully onto the valve shaft.
Avoid forcing it, since this may damage the seg-
ment and seat. We recommend mounting the
actuator so that the cylinder is pointing upwards.
❑
Align the actuator as accurately as possible
using the valve as a guide. Lubricate the mount-
ing screws. Install the washers and tighten all
screws, see Table 4.
❑
Adjust the segment open and closed positions
(limits to piston movement) by means of the actu-
ator stop screws, see Fig. 36. The correct open-
ing angle is 90°, for the R2_S valve 70°. The
accurate position can be seen in the flow port.
Check that the yellow arrow indicates the posi-
tion of the segment.
Keep your fingers out of the flow port!
Table 6
Bushing dimensions
Actuator
Outer dim.
(mm)
Inner dim.
(mm)
Height
(mm)
EC/EJ05
24.5
12.5
15
EC/EJ07
24.5
16.5
32.75
EC/EJ10
24.5
20.5
45
Fig. 35
Detaching an actuator by loosening the tight-
ening screw
CAUTION:
Beware of the segment movement!
Fig. 36
Open and closed positions of a B1 actuator
Stop screw for the
OPEN position
Stop screw for the
CLOSED position
