12
2 L6 70 en
Install the gasket (18) and the blind flange (10).
Tighten the screws (26) lightly.
Then tighten the screws (26) crosswise and evenly.
First to 50 % of recommended torque, then to 100 %.
Recommended torque values for screws are listed in
Table 10.
Install the seat ring. See details in Section 5.5.
Install the body seal (19) and the clamp ring (2). See
details in Section 5.5.
Install the gland packing (see Section 5.3).
Check the contact line between the seat ring and the
disc (see Fig. 14).
6
DETACHING AND INSTALLING THE
ACTUATOR
6.1
General
The actuator is factory-mounted on the valve and the
stroke limit stop screws are adjusted in advance.
6.2
Detaching the B1 series actuators
Disconnect the actuator from its power source;
detach the air supply pipe and control signal cables
or pipes from their connectors.
Unscrew the bracket screws.
Detach the actuator using a suitable extractor. The
correct tool can be ordered from the manufacturer
(see Fig. 20).
Remove the bracket and coupling, if any.
6.3
Detaching the EC and EJ actuators
Disconnect the actuator from its power source;
detach the air supply pipe and control signal cables
or pipes from their connectors.
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 turning the tightening screw counter-clockwise.
The tightening 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 12.
Detach the actuator finally from the valve after the
screws that attach the actuator to the valve have
been removed.
6.4
Installing the B1 series actuator
Turn the valve to the closed position before mount-
ing the actuator.
Clean the shaft and the shaft bore and file off any
burrs which could interfere with mounting. Protect
the joint surfaces from corrosion, e.g. with Cortec
VCI 369 or an equivalent anti-corrosive agent..
Table 11. Pressing the pins, forces kN
Pin diameter,
mm
Force, kN
Pin diameter,
mm
Force, kN
5
45
20
500
6
70
25
780
8
95
30
1125
10
140
35
1500
12
200
40
2000
15
300
50
3150
CAUTION:
When handling the valve or the valve package, bear in
mind its weight!
CAUTION:
The actuator must not be removed from the valve in a
pipeline under pressure as result of dynamic torque!
CAUTION:
Do not detach a spring-return actuator unless a stop-
screw is carrying the spring force!
NOTE:
Do not turn the disc more than 90° as this could damage
the seat. The valve is so constructed that the disc operates
only between 0-90°.
NOTE:
Before dismantling, carefully observe the position of the
valve with respect to the actuator and positioner/limit
switch so as to ensure that the package can be properly
reassembled.
Fig. 20.
Actuator removal, B1 series
Fig. 21.
Detaching the EC/EJ actuator
Table 12. 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
EC/EJ12
Summary of Contents for NELDISC L4 Series
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